./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/queue_ok_longer.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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/queue_ok_longer.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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:21:36,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:21:36,771 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:21:36,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:21:36,775 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:21:36,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:21:36,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:21:36,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:21:36,805 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:21:36,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:21:36,810 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:21:36,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:21:36,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:21:36,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:21:36,813 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:21:36,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:21:36,814 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:21:36,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:21:36,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:21:36,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:21:36,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:21:36,815 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:21:36,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:21:36,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:21:36,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:21:36,816 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:21:36,816 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:21:36,816 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:21:36,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:21:36,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:21:36,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:21:36,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:21:36,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:36,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:21:36,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:21:36,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:21:36,820 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:21:36,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:21:36,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:21:36,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:21:36,821 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:21:36,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:21:36,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:21:36,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:21:37,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:21:37,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:21:37,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:21:37,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:21:37,092 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:21:37,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_ok_longer.i [2024-02-20 11:21:38,331 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:21:38,620 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:21:38,624 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_ok_longer.i [2024-02-20 11:21:38,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f931c1c79/598a5d499fc84267b4bf0c34b254aa4a/FLAG6935573d5 [2024-02-20 11:21:38,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f931c1c79/598a5d499fc84267b4bf0c34b254aa4a [2024-02-20 11:21:38,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:21:38,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:21:38,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:38,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:21:38,675 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:21:38,676 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,677 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3716e0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:38, skipping insertion in model container [2024-02-20 11:21:38,677 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:21:38" (1/1) ... [2024-02-20 11:21:38,723 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:21:39,112 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/queue_ok_longer.i[43272,43285] [2024-02-20 11:21:39,117 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/queue_ok_longer.i[43545,43558] [2024-02-20 11:21:39,123 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:39,140 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:21:39,180 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/queue_ok_longer.i[43272,43285] [2024-02-20 11:21:39,186 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/queue_ok_longer.i[43545,43558] [2024-02-20 11:21:39,193 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:21:39,247 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:21:39,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39 WrapperNode [2024-02-20 11:21:39,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:21:39,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:39,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:21:39,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:21:39,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,285 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,321 INFO L138 Inliner]: procedures = 275, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2024-02-20 11:21:39,321 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:21:39,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:21:39,322 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:21:39,322 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:21:39,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,346 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,364 INFO L175 MemorySlicer]: Split 38 memory accesses to 6 slices as follows [2, 24, 5, 3, 2, 2]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0, 0]. The 15 writes are split as follows [0, 11, 0, 2, 1, 1]. [2024-02-20 11:21:39,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:21:39,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:21:39,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:21:39,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:21:39,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (1/1) ... [2024-02-20 11:21:39,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:21:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:39,445 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) [2024-02-20 11:21:39,453 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 [2024-02-20 11:21:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-20 11:21:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-20 11:21:39,480 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-20 11:21:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:21:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-20 11:21:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-20 11:21:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-02-20 11:21:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:21:39,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:21:39,485 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:21:39,594 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:21:39,596 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:21:39,878 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:21:39,879 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:21:40,038 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:21:40,038 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-20 11:21:40,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:40 BoogieIcfgContainer [2024-02-20 11:21:40,039 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:21:40,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:21:40,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:21:40,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:21:40,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:21:38" (1/3) ... [2024-02-20 11:21:40,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753b14f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:40, skipping insertion in model container [2024-02-20 11:21:40,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:21:39" (2/3) ... [2024-02-20 11:21:40,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753b14f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:21:40, skipping insertion in model container [2024-02-20 11:21:40,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:21:40" (3/3) ... [2024-02-20 11:21:40,044 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2024-02-20 11:21:40,057 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:21:40,057 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-20 11:21:40,057 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:21:40,094 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 11:21:40,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 41 transitions, 96 flow [2024-02-20 11:21:40,133 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2024-02-20 11:21:40,133 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:21:40,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 39 events. 7/39 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-02-20 11:21:40,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 41 transitions, 96 flow [2024-02-20 11:21:40,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 37 transitions, 83 flow [2024-02-20 11:21:40,144 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:21:40,149 INFO L369 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=All, 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;@6c507182, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:21:40,149 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-20 11:21:40,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:21:40,151 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-20 11:21:40,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-20 11:21:40,151 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,152 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-20 11:21:40,152 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash 541883, now seen corresponding path program 1 times [2024-02-20 11:21:40,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745941352] [2024-02-20 11:21:40,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745941352] [2024-02-20 11:21:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745941352] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:40,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:40,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:21:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124424920] [2024-02-20 11:21:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,420 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-02-20 11:21:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-02-20 11:21:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-02-20 11:21:40,440 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 83 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2024-02-20 11:21:40,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,580 INFO L124 PetriNetUnfolderBase]: 303/522 cut-off events. [2024-02-20 11:21:40,582 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-20 11:21:40,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 522 events. 303/522 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2052 event pairs, 209 based on Foata normal form. 16/458 useless extension candidates. Maximal degree in co-relation 914. Up to 485 conditions per place. [2024-02-20 11:21:40,589 INFO L140 encePairwiseOnDemand]: 39/41 looper letters, 26 selfloop transitions, 0 changer transitions 2/33 dead transitions. [2024-02-20 11:21:40,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 131 flow [2024-02-20 11:21:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-02-20 11:21:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-02-20 11:21:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2024-02-20 11:21:40,599 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-02-20 11:21:40,604 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-02-20 11:21:40,604 INFO L507 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 131 flow [2024-02-20 11:21:40,604 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2024-02-20 11:21:40,604 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,605 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:40,605 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:21:40,605 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:40,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:40,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2030950034, now seen corresponding path program 1 times [2024-02-20 11:21:40,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:40,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315924183] [2024-02-20 11:21:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315924183] [2024-02-20 11:21:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315924183] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:40,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:40,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:21:40,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133104704] [2024-02-20 11:21:40,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:40,877 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:40,881 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:40,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-02-20 11:21:40,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:40,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:40,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:40,988 INFO L124 PetriNetUnfolderBase]: 231/444 cut-off events. [2024-02-20 11:21:40,988 INFO L125 PetriNetUnfolderBase]: For 73/107 co-relation queries the response was YES. [2024-02-20 11:21:40,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309 conditions, 444 events. 231/444 cut-off events. For 73/107 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1813 event pairs, 121 based on Foata normal form. 14/414 useless extension candidates. Maximal degree in co-relation 1074. Up to 413 conditions per place. [2024-02-20 11:21:40,992 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 28 selfloop transitions, 2 changer transitions 9/44 dead transitions. [2024-02-20 11:21:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 259 flow [2024-02-20 11:21:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-20 11:21:40,995 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-02-20 11:21:40,996 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-02-20 11:21:40,997 INFO L507 AbstractCegarLoop]: Abstraction has has 38 places, 44 transitions, 259 flow [2024-02-20 11:21:40,997 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-02-20 11:21:40,997 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:40,998 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,000 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:21:41,000 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:41,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2039704393, now seen corresponding path program 1 times [2024-02-20 11:21:41,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:41,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704631499] [2024-02-20 11:21:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:41,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704631499] [2024-02-20 11:21:41,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704631499] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:41,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:41,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:21:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874954338] [2024-02-20 11:21:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,074 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:41,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:41,075 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:41,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 44 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-02-20 11:21:41,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:41,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:41,238 INFO L124 PetriNetUnfolderBase]: 246/471 cut-off events. [2024-02-20 11:21:41,240 INFO L125 PetriNetUnfolderBase]: For 110/162 co-relation queries the response was YES. [2024-02-20 11:21:41,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 471 events. 246/471 cut-off events. For 110/162 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1917 event pairs, 121 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 1526. Up to 440 conditions per place. [2024-02-20 11:21:41,242 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 34 selfloop transitions, 2 changer transitions 11/52 dead transitions. [2024-02-20 11:21:41,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 404 flow [2024-02-20 11:21:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-20 11:21:41,244 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-02-20 11:21:41,245 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-02-20 11:21:41,246 INFO L507 AbstractCegarLoop]: Abstraction has has 40 places, 52 transitions, 404 flow [2024-02-20 11:21:41,246 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2024-02-20 11:21:41,246 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:41,246 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,246 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:21:41,247 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:41,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:41,247 INFO L85 PathProgramCache]: Analyzing trace with hash -453168286, now seen corresponding path program 1 times [2024-02-20 11:21:41,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:41,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132826268] [2024-02-20 11:21:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:41,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132826268] [2024-02-20 11:21:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132826268] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:21:41,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:21:41,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:21:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791201080] [2024-02-20 11:21:41,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,400 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:21:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:21:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:21:41,402 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:41,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-02-20 11:21:41,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:41,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:41,481 INFO L124 PetriNetUnfolderBase]: 189/412 cut-off events. [2024-02-20 11:21:41,481 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2024-02-20 11:21:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 412 events. 189/412 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1661 event pairs, 45 based on Foata normal form. 10/394 useless extension candidates. Maximal degree in co-relation 1508. Up to 355 conditions per place. [2024-02-20 11:21:41,483 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 42 selfloop transitions, 3 changer transitions 17/67 dead transitions. [2024-02-20 11:21:41,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 660 flow [2024-02-20 11:21:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:21:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:21:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-02-20 11:21:41,486 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-02-20 11:21:41,487 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-02-20 11:21:41,487 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 67 transitions, 660 flow [2024-02-20 11:21:41,488 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-02-20 11:21:41,488 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:41,488 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,488 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:21:41,488 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:41,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 395729065, now seen corresponding path program 1 times [2024-02-20 11:21:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109045627] [2024-02-20 11:21:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:41,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109045627] [2024-02-20 11:21:41,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109045627] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:41,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392807761] [2024-02-20 11:21:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:41,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:41,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:41,569 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) [2024-02-20 11:21:41,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 11:21:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:41,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-20 11:21:41,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392807761] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:41,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:41,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-20 11:21:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278610134] [2024-02-20 11:21:41,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:41,775 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 11:21:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 11:21:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-20 11:21:41,776 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:41,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 67 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2024-02-20 11:21:41,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:41,908 INFO L124 PetriNetUnfolderBase]: 219/472 cut-off events. [2024-02-20 11:21:41,908 INFO L125 PetriNetUnfolderBase]: For 462/462 co-relation queries the response was YES. [2024-02-20 11:21:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 472 events. 219/472 cut-off events. For 462/462 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1860 event pairs, 45 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 2162. Up to 415 conditions per place. [2024-02-20 11:21:41,911 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 55 selfloop transitions, 5 changer transitions 20/85 dead transitions. [2024-02-20 11:21:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 1009 flow [2024-02-20 11:21:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:21:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:21:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-02-20 11:21:41,916 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-02-20 11:21:41,918 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-02-20 11:21:41,918 INFO L507 AbstractCegarLoop]: Abstraction has has 47 places, 85 transitions, 1009 flow [2024-02-20 11:21:41,918 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2024-02-20 11:21:41,918 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:41,919 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:41,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-20 11:21:42,129 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:42,130 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:42,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash -977352800, now seen corresponding path program 2 times [2024-02-20 11:21:42,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:42,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977648689] [2024-02-20 11:21:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:42,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:42,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:42,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977648689] [2024-02-20 11:21:42,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977648689] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:42,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940417783] [2024-02-20 11:21:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:21:42,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:42,313 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) [2024-02-20 11:21:42,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 11:21:42,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:21:42,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:42,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-20 11:21:42,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:42,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940417783] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:42,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-20 11:21:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000532277] [2024-02-20 11:21:42,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:42,585 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:21:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:21:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:21:42,587 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:42,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 85 transitions, 1009 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 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) [2024-02-20 11:21:42,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:42,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:42,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:42,774 INFO L124 PetriNetUnfolderBase]: 279/592 cut-off events. [2024-02-20 11:21:42,774 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-02-20 11:21:42,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 592 events. 279/592 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2272 event pairs, 45 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 3362. Up to 535 conditions per place. [2024-02-20 11:21:42,777 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 79 selfloop transitions, 11 changer transitions 26/121 dead transitions. [2024-02-20 11:21:42,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 121 transitions, 1691 flow [2024-02-20 11:21:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:21:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:21:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-02-20 11:21:42,779 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-02-20 11:21:42,779 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-02-20 11:21:42,779 INFO L507 AbstractCegarLoop]: Abstraction has has 58 places, 121 transitions, 1691 flow [2024-02-20 11:21:42,780 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 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) [2024-02-20 11:21:42,780 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:42,780 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:42,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-20 11:21:42,996 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-20 11:21:42,997 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:42,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 550042368, now seen corresponding path program 3 times [2024-02-20 11:21:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:42,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39310361] [2024-02-20 11:21:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:43,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:43,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39310361] [2024-02-20 11:21:43,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39310361] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:43,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231469837] [2024-02-20 11:21:43,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:21:43,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:43,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:43,237 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) [2024-02-20 11:21:43,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 11:21:48,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-20 11:21:48,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:48,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-20 11:21:48,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:48,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:48,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231469837] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:48,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-20 11:21:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240277572] [2024-02-20 11:21:48,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:48,701 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-20 11:21:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-20 11:21:48,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-20 11:21:48,704 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:48,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 121 transitions, 1691 flow. Second operand has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 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) [2024-02-20 11:21:48,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:48,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:48,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:49,033 INFO L124 PetriNetUnfolderBase]: 399/832 cut-off events. [2024-02-20 11:21:49,033 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2024-02-20 11:21:49,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6339 conditions, 832 events. 399/832 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3106 event pairs, 45 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 5774. Up to 775 conditions per place. [2024-02-20 11:21:49,039 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 127 selfloop transitions, 23 changer transitions 38/193 dead transitions. [2024-02-20 11:21:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 193 transitions, 3111 flow [2024-02-20 11:21:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-20 11:21:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-20 11:21:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 364 transitions. [2024-02-20 11:21:49,041 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-02-20 11:21:49,041 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 44 predicate places. [2024-02-20 11:21:49,042 INFO L507 AbstractCegarLoop]: Abstraction has has 81 places, 193 transitions, 3111 flow [2024-02-20 11:21:49,042 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.64) internal successors, (241), 25 states have internal predecessors, (241), 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) [2024-02-20 11:21:49,042 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:49,042 INFO L234 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:49,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 11:21:49,252 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:49,253 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:49,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:49,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1997747638, now seen corresponding path program 4 times [2024-02-20 11:21:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:49,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757766221] [2024-02-20 11:21:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:49,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:49,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757766221] [2024-02-20 11:21:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757766221] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:49,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116570598] [2024-02-20 11:21:49,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:21:49,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:49,984 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) [2024-02-20 11:21:49,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 11:21:50,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:21:50,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:21:50,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-20 11:21:50,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:21:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:50,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:21:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116570598] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:21:50,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:21:50,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-02-20 11:21:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771903979] [2024-02-20 11:21:50,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:21:50,900 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-02-20 11:21:50,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:21:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-02-20 11:21:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-02-20 11:21:50,902 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-02-20 11:21:50,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 193 transitions, 3111 flow. Second operand has 49 states, 49 states have (on average 9.326530612244898) internal successors, (457), 49 states have internal predecessors, (457), 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) [2024-02-20 11:21:50,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:21:50,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-02-20 11:21:50,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:21:51,661 INFO L124 PetriNetUnfolderBase]: 639/1312 cut-off events. [2024-02-20 11:21:51,662 INFO L125 PetriNetUnfolderBase]: For 1261/1261 co-relation queries the response was YES. [2024-02-20 11:21:51,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11482 conditions, 1312 events. 639/1312 cut-off events. For 1261/1261 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4755 event pairs, 45 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 10850. Up to 1255 conditions per place. [2024-02-20 11:21:51,671 INFO L140 encePairwiseOnDemand]: 38/41 looper letters, 223 selfloop transitions, 47 changer transitions 62/337 dead transitions. [2024-02-20 11:21:51,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 337 transitions, 6151 flow [2024-02-20 11:21:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-20 11:21:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-20 11:21:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 712 transitions. [2024-02-20 11:21:51,675 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3617886178861789 [2024-02-20 11:21:51,677 INFO L308 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-02-20 11:21:51,677 INFO L507 AbstractCegarLoop]: Abstraction has has 128 places, 337 transitions, 6151 flow [2024-02-20 11:21:51,678 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.326530612244898) internal successors, (457), 49 states have internal predecessors, (457), 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) [2024-02-20 11:21:51,678 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:21:51,678 INFO L234 CegarLoopForPetriNet]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:21:51,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-20 11:21:51,890 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:51,891 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-20 11:21:51,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:21:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 666012106, now seen corresponding path program 5 times [2024-02-20 11:21:51,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:21:51,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294068543] [2024-02-20 11:21:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:21:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:21:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:21:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:21:54,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:21:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294068543] [2024-02-20 11:21:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294068543] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:21:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101785694] [2024-02-20 11:21:54,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:21:54,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:21:54,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:21:54,215 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) [2024-02-20 11:21:54,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15