./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c --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/weaver/unroll-2.wvr.c -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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:56:50,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:56:50,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:56:50,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:56:50,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:56:50,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:56:50,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:56:50,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:56:50,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:56:50,952 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:56:50,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:56:50,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:56:50,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:56:50,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:56:50,955 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:56:50,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:56:50,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:56:50,955 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:56:50,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:56:50,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:56:50,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:56:50,956 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:56:50,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:56:50,957 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:56:50,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:56:50,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:56:50,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:56:50,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:56:50,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:56:50,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:56:50,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:56:50,959 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:56:50,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:56:50,960 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:56:50,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:56:50,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:56:50,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:56:50,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:56:50,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:56:50,961 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:56:50,961 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:56:50,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:56:50,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:56:50,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2024-01-27 15:56:51,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:56:51,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:56:51,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:56:51,200 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:56:51,200 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:56:51,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-2.wvr.c [2024-01-27 15:56:52,200 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:56:52,333 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:56:52,334 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c [2024-01-27 15:56:52,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570468a76/525d197001c7448a84428fa249fb1505/FLAG01bd2c94f [2024-01-27 15:56:52,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/570468a76/525d197001c7448a84428fa249fb1505 [2024-01-27 15:56:52,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:56:52,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:56:52,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:56:52,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:56:52,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:56:52,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43985789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52, skipping insertion in model container [2024-01-27 15:56:52,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:56:52,508 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2024-01-27 15:56:52,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:56:52,522 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:56:52,539 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-2.wvr.c[2454,2467] [2024-01-27 15:56:52,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:56:52,556 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:56:52,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52 WrapperNode [2024-01-27 15:56:52,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:56:52,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:56:52,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:56:52,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:56:52,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,569 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,586 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 139 [2024-01-27 15:56:52,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:56:52,587 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:56:52,587 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:56:52,587 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:56:52,596 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,596 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,598 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,610 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:56:52,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,616 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,624 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,625 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,626 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,628 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:56:52,629 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:56:52,629 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:56:52,629 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:56:52,629 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (1/1) ... [2024-01-27 15:56:52,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:56:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:52,653 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 15:56:52,670 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 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:56:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:56:52,712 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:56:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:56:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:56:52,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:56:52,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:56:52,716 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 15:56:52,804 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:56:52,805 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:56:53,049 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:56:53,050 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:56:53,233 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:56:53,234 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:56:53,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:56:53 BoogieIcfgContainer [2024-01-27 15:56:53,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:56:53,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:56:53,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:56:53,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:56:53,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:56:52" (1/3) ... [2024-01-27 15:56:53,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608e5b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:56:53, skipping insertion in model container [2024-01-27 15:56:53,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:56:52" (2/3) ... [2024-01-27 15:56:53,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608e5b9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:56:53, skipping insertion in model container [2024-01-27 15:56:53,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:56:53" (3/3) ... [2024-01-27 15:56:53,254 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2024-01-27 15:56:53,260 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:56:53,267 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:56:53,267 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:56:53,268 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:56:53,318 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:56:53,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:56:53,379 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:56:53,379 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:56:53,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-27 15:56:53,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:56:53,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:56:53,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:56:53,406 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;@7126ac7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:56:53,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:56:53,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:56:53,419 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:56:53,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:56:53,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:53,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:53,421 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 15:56:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash 792465794, now seen corresponding path program 1 times [2024-01-27 15:56:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:53,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940122769] [2024-01-27 15:56:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:53,747 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 15:56:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940122769] [2024-01-27 15:56:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940122769] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:53,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:56:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:56:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321224566] [2024-01-27 15:56:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:53,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:56:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:56:53,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:56:53,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:53,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:56:53,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:53,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:53,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:53,898 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2024-01-27 15:56:53,898 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-01-27 15:56:53,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2024-01-27 15:56:53,904 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2024-01-27 15:56:53,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2024-01-27 15:56:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:56:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:56:53,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-01-27 15:56:53,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-01-27 15:56:53,917 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2024-01-27 15:56:53,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2024-01-27 15:56:53,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:56:53,923 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2024-01-27 15:56:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2024-01-27 15:56:53,928 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:56:53,928 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2024-01-27 15:56:53,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 15:56:53,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:53,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:56:53,932 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 15:56:53,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1619189987, now seen corresponding path program 1 times [2024-01-27 15:56:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065536011] [2024-01-27 15:56:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:54,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:54,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065536011] [2024-01-27 15:56:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065536011] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:54,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:56:54,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:56:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545738909] [2024-01-27 15:56:54,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:56:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:56:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:56:54,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:54,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 15:56:54,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:54,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:54,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:54,158 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2024-01-27 15:56:54,159 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-27 15:56:54,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 330 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2024-01-27 15:56:54,161 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2024-01-27 15:56:54,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2024-01-27 15:56:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:56:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:56:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-27 15:56:54,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-27 15:56:54,164 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2024-01-27 15:56:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2024-01-27 15:56:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:56:54,166 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2024-01-27 15:56:54,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2024-01-27 15:56:54,167 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2024-01-27 15:56:54,167 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2024-01-27 15:56:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 15:56:54,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:54,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:56:54,171 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 15:56:54,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 43187384, now seen corresponding path program 1 times [2024-01-27 15:56:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:54,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324755538] [2024-01-27 15:56:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:54,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:54,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324755538] [2024-01-27 15:56:54,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324755538] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:54,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154129475] [2024-01-27 15:56:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:54,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:54,349 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 15:56:54,364 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 15:56:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:54,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:56:54,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:54,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:56:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154129475] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:54,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:56:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-01-27 15:56:54,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149015181] [2024-01-27 15:56:54,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:54,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:56:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:56:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:56:54,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:54,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 15:56:54,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:54,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:54,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:54,691 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2024-01-27 15:56:54,691 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-01-27 15:56:54,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 413 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2024-01-27 15:56:54,693 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2024-01-27 15:56:54,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2024-01-27 15:56:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:56:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:56:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2024-01-27 15:56:54,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:56:54,694 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2024-01-27 15:56:54,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2024-01-27 15:56:54,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:56:54,697 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2024-01-27 15:56:54,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2024-01-27 15:56:54,698 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-01-27 15:56:54,699 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2024-01-27 15:56:54,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 15:56:54,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:54,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:54,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:56:54,910 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 15:56:54,910 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 15:56:54,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash 655494007, now seen corresponding path program 1 times [2024-01-27 15:56:54,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:54,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571274789] [2024-01-27 15:56:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:54,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:55,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:55,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571274789] [2024-01-27 15:56:55,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571274789] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:55,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:56:55,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:56:55,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132381926] [2024-01-27 15:56:55,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:56:55,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:55,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:56:55,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:56:55,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:55,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:55,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:55,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:55,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:55,153 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2024-01-27 15:56:55,153 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-01-27 15:56:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 619 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2024-01-27 15:56:55,155 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2024-01-27 15:56:55,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2024-01-27 15:56:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:56:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:56:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-01-27 15:56:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-27 15:56:55,159 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2024-01-27 15:56:55,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2024-01-27 15:56:55,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:56:55,161 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2024-01-27 15:56:55,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2024-01-27 15:56:55,163 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2024-01-27 15:56:55,163 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2024-01-27 15:56:55,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:55,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:55,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:56:55,163 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 15:56:55,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1389158956, now seen corresponding path program 2 times [2024-01-27 15:56:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790607559] [2024-01-27 15:56:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790607559] [2024-01-27 15:56:55,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790607559] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:55,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867501583] [2024-01-27 15:56:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:56:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:55,275 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 15:56:55,287 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 15:56:55,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:56:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:56:55,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:56:55,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:55,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:56:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:55,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867501583] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:56:55,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:56:55,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-27 15:56:55,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098442383] [2024-01-27 15:56:55,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:56:55,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:56:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:56:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:56:55,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:55,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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 15:56:55,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:55,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:55,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:55,527 INFO L124 PetriNetUnfolderBase]: 117/235 cut-off events. [2024-01-27 15:56:55,527 INFO L125 PetriNetUnfolderBase]: For 276/276 co-relation queries the response was YES. [2024-01-27 15:56:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 235 events. 117/235 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 814 event pairs, 42 based on Foata normal form. 6/240 useless extension candidates. Maximal degree in co-relation 764. Up to 135 conditions per place. [2024-01-27 15:56:55,529 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 34 selfloop transitions, 11 changer transitions 6/52 dead transitions. [2024-01-27 15:56:55,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 52 transitions, 340 flow [2024-01-27 15:56:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:56:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:56:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-01-27 15:56:55,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-01-27 15:56:55,531 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 5 states and 58 transitions. [2024-01-27 15:56:55,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 52 transitions, 340 flow [2024-01-27 15:56:55,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 52 transitions, 322 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:56:55,533 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 196 flow [2024-01-27 15:56:55,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-01-27 15:56:55,533 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-27 15:56:55,534 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 196 flow [2024-01-27 15:56:55,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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 15:56:55,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:55,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:55,561 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 15:56:55,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:55,764 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 15:56:55,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2130320995, now seen corresponding path program 2 times [2024-01-27 15:56:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:55,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515615223] [2024-01-27 15:56:55,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:55,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515615223] [2024-01-27 15:56:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515615223] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047135647] [2024-01-27 15:56:55,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:56:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:55,887 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 15:56:55,911 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 15:56:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:56:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:56:55,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:56:55,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:56,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:56:56,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047135647] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:56,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:56:56,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-01-27 15:56:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085763663] [2024-01-27 15:56:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:56,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:56:56,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:56:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:56:56,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:56,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:56,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:56,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:56,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:56,097 INFO L124 PetriNetUnfolderBase]: 123/245 cut-off events. [2024-01-27 15:56:56,097 INFO L125 PetriNetUnfolderBase]: For 475/475 co-relation queries the response was YES. [2024-01-27 15:56:56,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 245 events. 123/245 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 889 event pairs, 38 based on Foata normal form. 4/248 useless extension candidates. Maximal degree in co-relation 906. Up to 147 conditions per place. [2024-01-27 15:56:56,100 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 37 selfloop transitions, 11 changer transitions 4/53 dead transitions. [2024-01-27 15:56:56,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 399 flow [2024-01-27 15:56:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:56:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:56:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2024-01-27 15:56:56,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-01-27 15:56:56,103 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 196 flow. Second operand 5 states and 57 transitions. [2024-01-27 15:56:56,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 399 flow [2024-01-27 15:56:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 397 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 15:56:56,108 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 273 flow [2024-01-27 15:56:56,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-01-27 15:56:56,110 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-01-27 15:56:56,110 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 273 flow [2024-01-27 15:56:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:56,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:56,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:56,128 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 15:56:56,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:56,329 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 15:56:56,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 499055579, now seen corresponding path program 3 times [2024-01-27 15:56:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015794273] [2024-01-27 15:56:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015794273] [2024-01-27 15:56:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015794273] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142788351] [2024-01-27 15:56:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:56:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:56,413 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 15:56:56,432 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 15:56:56,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:56:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:56:56,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:56:56,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:56,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:56:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:56,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142788351] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:56,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:56:56,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-01-27 15:56:56,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426090529] [2024-01-27 15:56:56,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:56,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:56:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:56:56,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:56:56,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:56,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 15:56:56,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:56,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:56,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:56,604 INFO L124 PetriNetUnfolderBase]: 123/238 cut-off events. [2024-01-27 15:56:56,604 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2024-01-27 15:56:56,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 238 events. 123/238 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 830 event pairs, 38 based on Foata normal form. 4/241 useless extension candidates. Maximal degree in co-relation 990. Up to 146 conditions per place. [2024-01-27 15:56:56,606 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 34 selfloop transitions, 9 changer transitions 4/48 dead transitions. [2024-01-27 15:56:56,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 424 flow [2024-01-27 15:56:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:56:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:56:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-01-27 15:56:56,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-01-27 15:56:56,607 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 273 flow. Second operand 4 states and 46 transitions. [2024-01-27 15:56:56,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 424 flow [2024-01-27 15:56:56,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 48 transitions, 409 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:56:56,610 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 302 flow [2024-01-27 15:56:56,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-01-27 15:56:56,611 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-01-27 15:56:56,611 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 302 flow [2024-01-27 15:56:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 15:56:56,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:56,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:56,633 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 15:56:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:56,823 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 15:56:56,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -934365726, now seen corresponding path program 3 times [2024-01-27 15:56:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:56,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636463158] [2024-01-27 15:56:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:56,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636463158] [2024-01-27 15:56:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636463158] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:56,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:56:56,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:56:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461271055] [2024-01-27 15:56:56,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:56,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:56:56,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:56:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:56:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:56,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:56,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:56,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:56,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:56,965 INFO L124 PetriNetUnfolderBase]: 106/197 cut-off events. [2024-01-27 15:56:56,965 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-01-27 15:56:56,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 197 events. 106/197 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 580 event pairs, 34 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 855. Up to 149 conditions per place. [2024-01-27 15:56:56,967 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 31 selfloop transitions, 11 changer transitions 2/45 dead transitions. [2024-01-27 15:56:56,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 45 transitions, 423 flow [2024-01-27 15:56:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:56:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:56:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2024-01-27 15:56:56,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:56:56,969 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 302 flow. Second operand 5 states and 45 transitions. [2024-01-27 15:56:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 45 transitions, 423 flow [2024-01-27 15:56:56,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 391 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:56:56,972 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 297 flow [2024-01-27 15:56:56,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2024-01-27 15:56:56,974 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-01-27 15:56:56,974 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 297 flow [2024-01-27 15:56:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:56,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:56,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:56,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:56:56,975 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 15:56:56,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -545012286, now seen corresponding path program 4 times [2024-01-27 15:56:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602200051] [2024-01-27 15:56:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:56,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:56:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602200051] [2024-01-27 15:56:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602200051] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:56:57,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:56:57,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:56:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198582695] [2024-01-27 15:56:57,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:56:57,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:56:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:57,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:56:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:56:57,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:57,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 297 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:57,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:57,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:57,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:57,133 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2024-01-27 15:56:57,133 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2024-01-27 15:56:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 182 events. 100/182 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 513 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 830. Up to 130 conditions per place. [2024-01-27 15:56:57,135 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2024-01-27 15:56:57,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 428 flow [2024-01-27 15:56:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:56:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:56:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2024-01-27 15:56:57,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:56:57,137 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 297 flow. Second operand 5 states and 45 transitions. [2024-01-27 15:56:57,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 428 flow [2024-01-27 15:56:57,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 400 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:56:57,140 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 306 flow [2024-01-27 15:56:57,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2024-01-27 15:56:57,141 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-01-27 15:56:57,141 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 306 flow [2024-01-27 15:56:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 15:56:57,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:57,141 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 15:56:57,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:56:57,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:56:57,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1203904628, now seen corresponding path program 1 times [2024-01-27 15:56:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:57,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156176244] [2024-01-27 15:56:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:56:57,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:56:57,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156176244] [2024-01-27 15:56:57,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156176244] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:56:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090462636] [2024-01-27 15:56:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:57,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:56:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:56:57,214 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 15:56:57,237 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 15:56:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:56:57,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-27 15:56:57,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:56:57,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:56:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:56:57,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:56:57,598 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 87 treesize of output 77 [2024-01-27 15:56:57,632 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:56:57,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-01-27 15:56:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:56:58,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090462636] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:56:58,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:56:58,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2024-01-27 15:56:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130769080] [2024-01-27 15:56:58,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:56:58,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:56:58,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:56:58,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:56:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:56:58,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:56:58,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 306 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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 15:56:58,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:56:58,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:56:58,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:56:59,140 INFO L124 PetriNetUnfolderBase]: 311/555 cut-off events. [2024-01-27 15:56:59,140 INFO L125 PetriNetUnfolderBase]: For 1980/1980 co-relation queries the response was YES. [2024-01-27 15:56:59,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2646 conditions, 555 events. 311/555 cut-off events. For 1980/1980 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 26 based on Foata normal form. 26/579 useless extension candidates. Maximal degree in co-relation 2591. Up to 239 conditions per place. [2024-01-27 15:56:59,144 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 61 selfloop transitions, 31 changer transitions 56/149 dead transitions. [2024-01-27 15:56:59,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 149 transitions, 1361 flow [2024-01-27 15:56:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:56:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:56:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 188 transitions. [2024-01-27 15:56:59,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 15:56:59,146 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 306 flow. Second operand 20 states and 188 transitions. [2024-01-27 15:56:59,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 149 transitions, 1361 flow [2024-01-27 15:56:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 149 transitions, 1257 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-01-27 15:56:59,152 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 540 flow [2024-01-27 15:56:59,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=540, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-01-27 15:56:59,152 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 49 predicate places. [2024-01-27 15:56:59,153 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 540 flow [2024-01-27 15:56:59,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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 15:56:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:56:59,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:56:59,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:56:59,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:56:59,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:56:59,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:56:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1670041114, now seen corresponding path program 2 times [2024-01-27 15:56:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:56:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297044076] [2024-01-27 15:56:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:56:59,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:56:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:00,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297044076] [2024-01-27 15:57:00,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297044076] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037857461] [2024-01-27 15:57:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:57:00,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:00,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:00,190 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 15:57:00,200 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 15:57:00,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:57:00,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:00,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:57:00,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:00,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:57:00,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-27 15:57:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:00,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:00,437 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:57:00,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:57:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:57:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037857461] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:00,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 14 [2024-01-27 15:57:00,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492509080] [2024-01-27 15:57:00,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:57:00,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:57:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:57:00,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:00,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 540 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 15:57:00,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:00,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:00,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:00,863 INFO L124 PetriNetUnfolderBase]: 289/524 cut-off events. [2024-01-27 15:57:00,863 INFO L125 PetriNetUnfolderBase]: For 2826/2826 co-relation queries the response was YES. [2024-01-27 15:57:00,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 524 events. 289/524 cut-off events. For 2826/2826 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1988 event pairs, 50 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2851. Up to 346 conditions per place. [2024-01-27 15:57:00,868 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 80 selfloop transitions, 36 changer transitions 1/118 dead transitions. [2024-01-27 15:57:00,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 1274 flow [2024-01-27 15:57:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:57:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:57:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 128 transitions. [2024-01-27 15:57:00,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40634920634920635 [2024-01-27 15:57:00,869 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 540 flow. Second operand 15 states and 128 transitions. [2024-01-27 15:57:00,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 1274 flow [2024-01-27 15:57:00,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 1113 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-01-27 15:57:00,877 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 772 flow [2024-01-27 15:57:00,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=772, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-01-27 15:57:00,878 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2024-01-27 15:57:00,878 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 772 flow [2024-01-27 15:57:00,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 15:57:00,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:00,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:00,894 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 15:57:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:01,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:01,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 458175700, now seen corresponding path program 3 times [2024-01-27 15:57:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330928055] [2024-01-27 15:57:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:57:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330928055] [2024-01-27 15:57:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330928055] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:01,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386267907] [2024-01-27 15:57:01,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:57:01,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:01,797 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 15:57:01,824 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 15:57:01,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:57:01,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:01,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-27 15:57:01,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:01,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:57:01,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-27 15:57:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:57:01,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:02,063 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-27 15:57:02,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-27 15:57:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386267907] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:02,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:02,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 4] total 15 [2024-01-27 15:57:02,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099052845] [2024-01-27 15:57:02,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:57:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:57:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:57:02,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:02,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 772 flow. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 15:57:02,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:02,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:02,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:02,480 INFO L124 PetriNetUnfolderBase]: 385/695 cut-off events. [2024-01-27 15:57:02,481 INFO L125 PetriNetUnfolderBase]: For 3255/3255 co-relation queries the response was YES. [2024-01-27 15:57:02,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3636 conditions, 695 events. 385/695 cut-off events. For 3255/3255 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2886 event pairs, 74 based on Foata normal form. 1/695 useless extension candidates. Maximal degree in co-relation 3060. Up to 493 conditions per place. [2024-01-27 15:57:02,487 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 96 selfloop transitions, 36 changer transitions 1/134 dead transitions. [2024-01-27 15:57:02,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 134 transitions, 1479 flow [2024-01-27 15:57:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:57:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:57:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 126 transitions. [2024-01-27 15:57:02,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-27 15:57:02,489 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 772 flow. Second operand 15 states and 126 transitions. [2024-01-27 15:57:02,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 134 transitions, 1479 flow [2024-01-27 15:57:02,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 1383 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-01-27 15:57:02,500 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 997 flow [2024-01-27 15:57:02,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=997, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-01-27 15:57:02,501 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2024-01-27 15:57:02,501 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 997 flow [2024-01-27 15:57:02,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 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 15:57:02,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:02,502 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:02,518 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 15:57:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:02,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:02,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1323799445, now seen corresponding path program 4 times [2024-01-27 15:57:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783284473] [2024-01-27 15:57:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783284473] [2024-01-27 15:57:02,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783284473] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:02,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183242186] [2024-01-27 15:57:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:57:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:02,897 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:57:03,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:57:03,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:03,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:03,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:03,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183242186] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:03,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:03,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-27 15:57:03,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447502705] [2024-01-27 15:57:03,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:03,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-27 15:57:03,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-27 15:57:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-01-27 15:57:03,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:03,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 997 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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 15:57:03,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:03,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:04,457 INFO L124 PetriNetUnfolderBase]: 605/1105 cut-off events. [2024-01-27 15:57:04,457 INFO L125 PetriNetUnfolderBase]: For 5204/5204 co-relation queries the response was YES. [2024-01-27 15:57:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5748 conditions, 1105 events. 605/1105 cut-off events. For 5204/5204 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5245 event pairs, 88 based on Foata normal form. 12/1117 useless extension candidates. Maximal degree in co-relation 5122. Up to 381 conditions per place. [2024-01-27 15:57:04,463 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 131 selfloop transitions, 46 changer transitions 0/178 dead transitions. [2024-01-27 15:57:04,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 178 transitions, 2069 flow [2024-01-27 15:57:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:57:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:57:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-01-27 15:57:04,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-01-27 15:57:04,465 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 997 flow. Second operand 11 states and 120 transitions. [2024-01-27 15:57:04,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 178 transitions, 2069 flow [2024-01-27 15:57:04,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 178 transitions, 1858 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-01-27 15:57:04,476 INFO L231 Difference]: Finished difference. Result has 95 places, 112 transitions, 1248 flow [2024-01-27 15:57:04,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1248, PETRI_PLACES=95, PETRI_TRANSITIONS=112} [2024-01-27 15:57:04,476 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 73 predicate places. [2024-01-27 15:57:04,476 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 112 transitions, 1248 flow [2024-01-27 15:57:04,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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 15:57:04,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:04,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:04,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:57:04,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:57:04,691 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:04,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash -222521120, now seen corresponding path program 5 times [2024-01-27 15:57:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713885955] [2024-01-27 15:57:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:04,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713885955] [2024-01-27 15:57:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713885955] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940405698] [2024-01-27 15:57:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:57:04,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:04,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:04,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:57:04,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:57:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:04,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:04,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:04,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:05,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940405698] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:05,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:05,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-01-27 15:57:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806156477] [2024-01-27 15:57:05,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:05,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:57:05,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:57:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:57:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:05,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 112 transitions, 1248 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 15:57:05,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:05,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:05,703 INFO L124 PetriNetUnfolderBase]: 621/1199 cut-off events. [2024-01-27 15:57:05,703 INFO L125 PetriNetUnfolderBase]: For 8883/8883 co-relation queries the response was YES. [2024-01-27 15:57:05,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6528 conditions, 1199 events. 621/1199 cut-off events. For 8883/8883 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6319 event pairs, 61 based on Foata normal form. 32/1231 useless extension candidates. Maximal degree in co-relation 6067. Up to 413 conditions per place. [2024-01-27 15:57:05,711 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 146 selfloop transitions, 86 changer transitions 26/259 dead transitions. [2024-01-27 15:57:05,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 259 transitions, 2961 flow [2024-01-27 15:57:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:57:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:57:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 184 transitions. [2024-01-27 15:57:05,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41723356009070295 [2024-01-27 15:57:05,713 INFO L175 Difference]: Start difference. First operand has 95 places, 112 transitions, 1248 flow. Second operand 21 states and 184 transitions. [2024-01-27 15:57:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 259 transitions, 2961 flow [2024-01-27 15:57:05,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 259 transitions, 2813 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-01-27 15:57:05,740 INFO L231 Difference]: Finished difference. Result has 120 places, 161 transitions, 1952 flow [2024-01-27 15:57:05,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1952, PETRI_PLACES=120, PETRI_TRANSITIONS=161} [2024-01-27 15:57:05,741 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2024-01-27 15:57:05,742 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 161 transitions, 1952 flow [2024-01-27 15:57:05,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 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 15:57:05,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:05,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:05,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:05,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:57:05,954 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:05,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:05,955 INFO L85 PathProgramCache]: Analyzing trace with hash -577321258, now seen corresponding path program 6 times [2024-01-27 15:57:05,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:05,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002828405] [2024-01-27 15:57:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:05,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:06,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002828405] [2024-01-27 15:57:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002828405] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66534137] [2024-01-27 15:57:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:57:06,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:06,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:06,121 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:06,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:57:06,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:57:06,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:06,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:06,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:06,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66534137] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:06,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:06,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:57:06,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527392361] [2024-01-27 15:57:06,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:06,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:57:06,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:06,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:57:06,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:57:06,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:06,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 161 transitions, 1952 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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 15:57:06,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:06,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:06,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:07,051 INFO L124 PetriNetUnfolderBase]: 614/1163 cut-off events. [2024-01-27 15:57:07,051 INFO L125 PetriNetUnfolderBase]: For 10797/10797 co-relation queries the response was YES. [2024-01-27 15:57:07,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7287 conditions, 1163 events. 614/1163 cut-off events. For 10797/10797 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5956 event pairs, 116 based on Foata normal form. 68/1231 useless extension candidates. Maximal degree in co-relation 7162. Up to 493 conditions per place. [2024-01-27 15:57:07,060 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 121 selfloop transitions, 147 changer transitions 6/275 dead transitions. [2024-01-27 15:57:07,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 275 transitions, 3782 flow [2024-01-27 15:57:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:57:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:57:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 188 transitions. [2024-01-27 15:57:07,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-01-27 15:57:07,062 INFO L175 Difference]: Start difference. First operand has 120 places, 161 transitions, 1952 flow. Second operand 20 states and 188 transitions. [2024-01-27 15:57:07,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 275 transitions, 3782 flow [2024-01-27 15:57:07,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 275 transitions, 3273 flow, removed 208 selfloop flow, removed 8 redundant places. [2024-01-27 15:57:07,100 INFO L231 Difference]: Finished difference. Result has 132 places, 212 transitions, 2934 flow [2024-01-27 15:57:07,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2934, PETRI_PLACES=132, PETRI_TRANSITIONS=212} [2024-01-27 15:57:07,101 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 110 predicate places. [2024-01-27 15:57:07,101 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 212 transitions, 2934 flow [2024-01-27 15:57:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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 15:57:07,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:07,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:07,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:07,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:57:07,313 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:07,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1789827872, now seen corresponding path program 7 times [2024-01-27 15:57:07,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:07,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250837495] [2024-01-27 15:57:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250837495] [2024-01-27 15:57:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250837495] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560598335] [2024-01-27 15:57:07,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:57:07,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:07,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:07,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:07,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:57:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:07,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:07,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:07,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:07,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560598335] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:07,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:07,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:57:07,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013078119] [2024-01-27 15:57:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:57:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:57:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:57:07,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:07,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 212 transitions, 2934 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:07,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:07,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:07,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:08,622 INFO L124 PetriNetUnfolderBase]: 619/1255 cut-off events. [2024-01-27 15:57:08,622 INFO L125 PetriNetUnfolderBase]: For 9636/9636 co-relation queries the response was YES. [2024-01-27 15:57:08,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7383 conditions, 1255 events. 619/1255 cut-off events. For 9636/9636 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6985 event pairs, 65 based on Foata normal form. 18/1273 useless extension candidates. Maximal degree in co-relation 7080. Up to 349 conditions per place. [2024-01-27 15:57:08,633 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 144 selfloop transitions, 153 changer transitions 11/309 dead transitions. [2024-01-27 15:57:08,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 309 transitions, 4047 flow [2024-01-27 15:57:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-27 15:57:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-27 15:57:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 246 transitions. [2024-01-27 15:57:08,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-01-27 15:57:08,638 INFO L175 Difference]: Start difference. First operand has 132 places, 212 transitions, 2934 flow. Second operand 31 states and 246 transitions. [2024-01-27 15:57:08,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 309 transitions, 4047 flow [2024-01-27 15:57:08,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 309 transitions, 3579 flow, removed 201 selfloop flow, removed 5 redundant places. [2024-01-27 15:57:08,682 INFO L231 Difference]: Finished difference. Result has 161 places, 225 transitions, 2972 flow [2024-01-27 15:57:08,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2972, PETRI_PLACES=161, PETRI_TRANSITIONS=225} [2024-01-27 15:57:08,683 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-01-27 15:57:08,683 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 225 transitions, 2972 flow [2024-01-27 15:57:08,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:08,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:08,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:08,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:08,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:57:08,901 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash -157880706, now seen corresponding path program 8 times [2024-01-27 15:57:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633333677] [2024-01-27 15:57:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:08,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:09,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:09,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633333677] [2024-01-27 15:57:09,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633333677] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:09,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581216161] [2024-01-27 15:57:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:57:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:09,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:09,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:57:09,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:57:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:09,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:09,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:09,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581216161] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:09,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:09,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 15:57:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626784508] [2024-01-27 15:57:09,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:09,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:57:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:57:09,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:57:09,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:09,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 225 transitions, 2972 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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) [2024-01-27 15:57:09,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:09,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:09,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:11,425 INFO L124 PetriNetUnfolderBase]: 794/1629 cut-off events. [2024-01-27 15:57:11,425 INFO L125 PetriNetUnfolderBase]: For 12654/12654 co-relation queries the response was YES. [2024-01-27 15:57:11,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9826 conditions, 1629 events. 794/1629 cut-off events. For 12654/12654 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9908 event pairs, 88 based on Foata normal form. 32/1661 useless extension candidates. Maximal degree in co-relation 9540. Up to 393 conditions per place. [2024-01-27 15:57:11,437 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 215 selfloop transitions, 205 changer transitions 15/436 dead transitions. [2024-01-27 15:57:11,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 436 transitions, 5805 flow [2024-01-27 15:57:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:57:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:57:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 356 transitions. [2024-01-27 15:57:11,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-01-27 15:57:11,440 INFO L175 Difference]: Start difference. First operand has 161 places, 225 transitions, 2972 flow. Second operand 44 states and 356 transitions. [2024-01-27 15:57:11,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 436 transitions, 5805 flow [2024-01-27 15:57:11,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 436 transitions, 5292 flow, removed 102 selfloop flow, removed 16 redundant places. [2024-01-27 15:57:11,484 INFO L231 Difference]: Finished difference. Result has 198 places, 309 transitions, 4365 flow [2024-01-27 15:57:11,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4365, PETRI_PLACES=198, PETRI_TRANSITIONS=309} [2024-01-27 15:57:11,485 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2024-01-27 15:57:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 309 transitions, 4365 flow [2024-01-27 15:57:11,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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) [2024-01-27 15:57:11,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:11,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:11,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:57:11,691 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:11,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash -789733728, now seen corresponding path program 9 times [2024-01-27 15:57:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:11,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302497400] [2024-01-27 15:57:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:11,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:11,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:11,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302497400] [2024-01-27 15:57:11,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302497400] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:11,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213553453] [2024-01-27 15:57:11,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:57:11,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:11,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:11,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:57:11,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:57:11,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:11,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:11,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:11,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213553453] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:12,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:57:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837264308] [2024-01-27 15:57:12,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:57:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:57:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:57:12,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:12,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 309 transitions, 4365 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:12,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:12,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:12,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:13,275 INFO L124 PetriNetUnfolderBase]: 785/1610 cut-off events. [2024-01-27 15:57:13,275 INFO L125 PetriNetUnfolderBase]: For 11306/11306 co-relation queries the response was YES. [2024-01-27 15:57:13,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10170 conditions, 1610 events. 785/1610 cut-off events. For 11306/11306 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9730 event pairs, 153 based on Foata normal form. 12/1622 useless extension candidates. Maximal degree in co-relation 10004. Up to 707 conditions per place. [2024-01-27 15:57:13,287 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 193 selfloop transitions, 188 changer transitions 0/382 dead transitions. [2024-01-27 15:57:13,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 382 transitions, 5593 flow [2024-01-27 15:57:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:57:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:57:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 222 transitions. [2024-01-27 15:57:13,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2024-01-27 15:57:13,291 INFO L175 Difference]: Start difference. First operand has 198 places, 309 transitions, 4365 flow. Second operand 26 states and 222 transitions. [2024-01-27 15:57:13,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 382 transitions, 5593 flow [2024-01-27 15:57:13,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 382 transitions, 5062 flow, removed 185 selfloop flow, removed 9 redundant places. [2024-01-27 15:57:13,353 INFO L231 Difference]: Finished difference. Result has 216 places, 314 transitions, 4423 flow [2024-01-27 15:57:13,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4423, PETRI_PLACES=216, PETRI_TRANSITIONS=314} [2024-01-27 15:57:13,354 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 194 predicate places. [2024-01-27 15:57:13,354 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 314 transitions, 4423 flow [2024-01-27 15:57:13,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:13,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:13,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:13,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:13,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:57:13,556 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:13,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1132249824, now seen corresponding path program 10 times [2024-01-27 15:57:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:13,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845193370] [2024-01-27 15:57:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845193370] [2024-01-27 15:57:13,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845193370] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314579938] [2024-01-27 15:57:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:57:13,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:13,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:13,708 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:13,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:57:13,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:57:13,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:13,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:13,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:13,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:13,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314579938] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:13,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:13,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:57:13,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315322454] [2024-01-27 15:57:13,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:13,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:57:13,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:57:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:57:13,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:13,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 314 transitions, 4423 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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 15:57:13,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:13,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:13,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:14,679 INFO L124 PetriNetUnfolderBase]: 859/1724 cut-off events. [2024-01-27 15:57:14,680 INFO L125 PetriNetUnfolderBase]: For 12209/12209 co-relation queries the response was YES. [2024-01-27 15:57:14,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 1724 events. 859/1724 cut-off events. For 12209/12209 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10418 event pairs, 191 based on Foata normal form. 18/1742 useless extension candidates. Maximal degree in co-relation 10970. Up to 953 conditions per place. [2024-01-27 15:57:14,696 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 224 selfloop transitions, 185 changer transitions 0/410 dead transitions. [2024-01-27 15:57:14,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 410 transitions, 6333 flow [2024-01-27 15:57:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:57:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:57:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 187 transitions. [2024-01-27 15:57:14,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38716356107660455 [2024-01-27 15:57:14,702 INFO L175 Difference]: Start difference. First operand has 216 places, 314 transitions, 4423 flow. Second operand 23 states and 187 transitions. [2024-01-27 15:57:14,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 410 transitions, 6333 flow [2024-01-27 15:57:14,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 410 transitions, 6057 flow, removed 30 selfloop flow, removed 19 redundant places. [2024-01-27 15:57:14,765 INFO L231 Difference]: Finished difference. Result has 226 places, 355 transitions, 5440 flow [2024-01-27 15:57:14,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5440, PETRI_PLACES=226, PETRI_TRANSITIONS=355} [2024-01-27 15:57:14,765 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 204 predicate places. [2024-01-27 15:57:14,765 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 355 transitions, 5440 flow [2024-01-27 15:57:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 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 15:57:14,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:14,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:14,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-27 15:57:14,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:14,967 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:14,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1107126112, now seen corresponding path program 11 times [2024-01-27 15:57:14,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:14,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712564058] [2024-01-27 15:57:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:14,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:15,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712564058] [2024-01-27 15:57:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712564058] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123409411] [2024-01-27 15:57:15,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:57:15,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:15,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:15,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:15,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:57:15,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:57:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:15,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:15,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:15,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123409411] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:15,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:57:15,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826622801] [2024-01-27 15:57:15,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:15,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:57:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:57:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:57:15,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:15,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 355 transitions, 5440 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:15,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:15,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:15,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:19,239 INFO L124 PetriNetUnfolderBase]: 1329/2780 cut-off events. [2024-01-27 15:57:19,239 INFO L125 PetriNetUnfolderBase]: For 25041/25041 co-relation queries the response was YES. [2024-01-27 15:57:19,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18742 conditions, 2780 events. 1329/2780 cut-off events. For 25041/25041 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19647 event pairs, 112 based on Foata normal form. 62/2842 useless extension candidates. Maximal degree in co-relation 18438. Up to 551 conditions per place. [2024-01-27 15:57:19,264 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 320 selfloop transitions, 371 changer transitions 24/716 dead transitions. [2024-01-27 15:57:19,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 716 transitions, 11574 flow [2024-01-27 15:57:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-27 15:57:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-27 15:57:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 404 transitions. [2024-01-27 15:57:19,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36996336996337 [2024-01-27 15:57:19,266 INFO L175 Difference]: Start difference. First operand has 226 places, 355 transitions, 5440 flow. Second operand 52 states and 404 transitions. [2024-01-27 15:57:19,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 716 transitions, 11574 flow [2024-01-27 15:57:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 716 transitions, 11219 flow, removed 56 selfloop flow, removed 13 redundant places. [2024-01-27 15:57:19,419 INFO L231 Difference]: Finished difference. Result has 283 places, 542 transitions, 9661 flow [2024-01-27 15:57:19,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=9661, PETRI_PLACES=283, PETRI_TRANSITIONS=542} [2024-01-27 15:57:19,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 261 predicate places. [2024-01-27 15:57:19,420 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 542 transitions, 9661 flow [2024-01-27 15:57:19,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 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 15:57:19,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:19,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:19,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:57:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:19,633 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:19,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1738979134, now seen corresponding path program 12 times [2024-01-27 15:57:19,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:19,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468451435] [2024-01-27 15:57:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468451435] [2024-01-27 15:57:19,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468451435] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:19,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409569390] [2024-01-27 15:57:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:57:19,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:19,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:19,779 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:19,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:57:19,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:57:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:19,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:19,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:19,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:20,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409569390] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:20,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:20,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:57:20,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808878834] [2024-01-27 15:57:20,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:57:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:20,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:57:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:57:20,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:20,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 542 transitions, 9661 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:57:20,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:20,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:20,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:24,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:57:26,584 INFO L124 PetriNetUnfolderBase]: 1619/3477 cut-off events. [2024-01-27 15:57:26,584 INFO L125 PetriNetUnfolderBase]: For 41580/41580 co-relation queries the response was YES. [2024-01-27 15:57:26,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26323 conditions, 3477 events. 1619/3477 cut-off events. For 41580/41580 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 26036 event pairs, 287 based on Foata normal form. 36/3513 useless extension candidates. Maximal degree in co-relation 25987. Up to 1375 conditions per place. [2024-01-27 15:57:26,614 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 390 selfloop transitions, 374 changer transitions 0/765 dead transitions. [2024-01-27 15:57:26,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 765 transitions, 14749 flow [2024-01-27 15:57:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 15:57:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 15:57:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 246 transitions. [2024-01-27 15:57:26,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-01-27 15:57:26,616 INFO L175 Difference]: Start difference. First operand has 283 places, 542 transitions, 9661 flow. Second operand 29 states and 246 transitions. [2024-01-27 15:57:26,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 765 transitions, 14749 flow [2024-01-27 15:57:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 765 transitions, 13465 flow, removed 549 selfloop flow, removed 11 redundant places. [2024-01-27 15:57:27,008 INFO L231 Difference]: Finished difference. Result has 304 places, 650 transitions, 12196 flow [2024-01-27 15:57:27,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12196, PETRI_PLACES=304, PETRI_TRANSITIONS=650} [2024-01-27 15:57:27,008 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 282 predicate places. [2024-01-27 15:57:27,008 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 650 transitions, 12196 flow [2024-01-27 15:57:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:57:27,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:27,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:27,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:57:27,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:27,215 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:27,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash 495128360, now seen corresponding path program 13 times [2024-01-27 15:57:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:27,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858433167] [2024-01-27 15:57:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:27,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:27,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858433167] [2024-01-27 15:57:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858433167] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858850423] [2024-01-27 15:57:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:57:27,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:27,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:27,346 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:27,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:57:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:27,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:27,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:27,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858850423] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:27,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:27,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:57:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358255923] [2024-01-27 15:57:27,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:27,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:57:27,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:57:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:57:27,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:27,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 650 transitions, 12196 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:57:27,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:27,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:33,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:57:38,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:57:42,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:57:43,660 INFO L124 PetriNetUnfolderBase]: 1835/3816 cut-off events. [2024-01-27 15:57:43,660 INFO L125 PetriNetUnfolderBase]: For 53468/53468 co-relation queries the response was YES. [2024-01-27 15:57:43,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30787 conditions, 3816 events. 1835/3816 cut-off events. For 53468/53468 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28366 event pairs, 190 based on Foata normal form. 78/3894 useless extension candidates. Maximal degree in co-relation 30439. Up to 986 conditions per place. [2024-01-27 15:57:43,698 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 358 selfloop transitions, 525 changer transitions 0/884 dead transitions. [2024-01-27 15:57:43,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 884 transitions, 17965 flow [2024-01-27 15:57:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-27 15:57:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-27 15:57:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 352 transitions. [2024-01-27 15:57:43,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3352380952380952 [2024-01-27 15:57:43,700 INFO L175 Difference]: Start difference. First operand has 304 places, 650 transitions, 12196 flow. Second operand 50 states and 352 transitions. [2024-01-27 15:57:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 884 transitions, 17965 flow [2024-01-27 15:57:44,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 884 transitions, 16938 flow, removed 448 selfloop flow, removed 15 redundant places. [2024-01-27 15:57:44,275 INFO L231 Difference]: Finished difference. Result has 349 places, 781 transitions, 15824 flow [2024-01-27 15:57:44,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11567, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=15824, PETRI_PLACES=349, PETRI_TRANSITIONS=781} [2024-01-27 15:57:44,276 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 327 predicate places. [2024-01-27 15:57:44,276 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 781 transitions, 15824 flow [2024-01-27 15:57:44,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:57:44,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:44,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:44,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:44,477 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:44,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 159243258, now seen corresponding path program 14 times [2024-01-27 15:57:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354692241] [2024-01-27 15:57:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354692241] [2024-01-27 15:57:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354692241] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424939799] [2024-01-27 15:57:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:57:44,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:44,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:44,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:57:44,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:57:44,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:44,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:44,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:44,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:44,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424939799] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:44,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:44,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:57:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344218725] [2024-01-27 15:57:44,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:44,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:57:44,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:57:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:57:44,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:44,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 781 transitions, 15824 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 15:57:44,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:44,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:44,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:48,198 INFO L124 PetriNetUnfolderBase]: 2169/4399 cut-off events. [2024-01-27 15:57:48,198 INFO L125 PetriNetUnfolderBase]: For 65185/65185 co-relation queries the response was YES. [2024-01-27 15:57:48,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37999 conditions, 4399 events. 2169/4399 cut-off events. For 65185/65185 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33073 event pairs, 367 based on Foata normal form. 70/4469 useless extension candidates. Maximal degree in co-relation 37633. Up to 2217 conditions per place. [2024-01-27 15:57:48,235 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 427 selfloop transitions, 634 changer transitions 0/1062 dead transitions. [2024-01-27 15:57:48,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1062 transitions, 23294 flow [2024-01-27 15:57:48,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-27 15:57:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-27 15:57:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 324 transitions. [2024-01-27 15:57:48,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282674772036474 [2024-01-27 15:57:48,236 INFO L175 Difference]: Start difference. First operand has 349 places, 781 transitions, 15824 flow. Second operand 47 states and 324 transitions. [2024-01-27 15:57:48,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1062 transitions, 23294 flow [2024-01-27 15:57:48,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1062 transitions, 22541 flow, removed 314 selfloop flow, removed 16 redundant places. [2024-01-27 15:57:48,998 INFO L231 Difference]: Finished difference. Result has 392 places, 963 transitions, 21336 flow [2024-01-27 15:57:48,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15187, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=21336, PETRI_PLACES=392, PETRI_TRANSITIONS=963} [2024-01-27 15:57:48,999 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 370 predicate places. [2024-01-27 15:57:48,999 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 963 transitions, 21336 flow [2024-01-27 15:57:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 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 15:57:48,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:48,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:49,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:49,200 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:49,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1851493202, now seen corresponding path program 15 times [2024-01-27 15:57:49,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:49,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824549170] [2024-01-27 15:57:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:49,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824549170] [2024-01-27 15:57:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824549170] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637489657] [2024-01-27 15:57:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:57:49,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:49,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:49,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:57:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:57:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:49,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:49,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:49,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637489657] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:49,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 15:57:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741494080] [2024-01-27 15:57:49,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:49,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:57:49,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:57:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:57:49,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:49,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 963 transitions, 21336 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 15:57:49,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:49,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:49,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:57:51,928 INFO L124 PetriNetUnfolderBase]: 3006/6112 cut-off events. [2024-01-27 15:57:51,929 INFO L125 PetriNetUnfolderBase]: For 110597/110597 co-relation queries the response was YES. [2024-01-27 15:57:51,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57612 conditions, 6112 events. 3006/6112 cut-off events. For 110597/110597 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49072 event pairs, 89 based on Foata normal form. 32/6144 useless extension candidates. Maximal degree in co-relation 57125. Up to 3114 conditions per place. [2024-01-27 15:57:51,983 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 1112 selfloop transitions, 312 changer transitions 12/1437 dead transitions. [2024-01-27 15:57:51,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1437 transitions, 34926 flow [2024-01-27 15:57:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:57:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:57:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 126 transitions. [2024-01-27 15:57:51,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-27 15:57:51,985 INFO L175 Difference]: Start difference. First operand has 392 places, 963 transitions, 21336 flow. Second operand 14 states and 126 transitions. [2024-01-27 15:57:51,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1437 transitions, 34926 flow [2024-01-27 15:57:53,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1437 transitions, 34105 flow, removed 292 selfloop flow, removed 14 redundant places. [2024-01-27 15:57:53,847 INFO L231 Difference]: Finished difference. Result has 401 places, 1173 transitions, 27570 flow [2024-01-27 15:57:53,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20682, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=27570, PETRI_PLACES=401, PETRI_TRANSITIONS=1173} [2024-01-27 15:57:53,848 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 379 predicate places. [2024-01-27 15:57:53,848 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1173 transitions, 27570 flow [2024-01-27 15:57:53,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 15:57:53,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:57:53,848 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:57:53,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:57:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:54,049 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:57:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:57:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1034585726, now seen corresponding path program 16 times [2024-01-27 15:57:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:57:54,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184869572] [2024-01-27 15:57:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:57:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:57:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:57:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:57:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184869572] [2024-01-27 15:57:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184869572] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:57:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215257242] [2024-01-27 15:57:54,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:57:54,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:57:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:57:54,232 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:57:54,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:57:54,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:57:54,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:57:54,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:57:54,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:57:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:54,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:57:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:57:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215257242] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:57:54,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:57:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:57:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560808582] [2024-01-27 15:57:54,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:57:54,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:57:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:57:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:57:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:57:54,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:57:54,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1173 transitions, 27570 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:57:54,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:57:54,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:57:54,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:01,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:02,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:05,234 INFO L124 PetriNetUnfolderBase]: 3987/8132 cut-off events. [2024-01-27 15:58:05,234 INFO L125 PetriNetUnfolderBase]: For 159638/159638 co-relation queries the response was YES. [2024-01-27 15:58:05,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78141 conditions, 8132 events. 3987/8132 cut-off events. For 159638/159638 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68273 event pairs, 65 based on Foata normal form. 60/8192 useless extension candidates. Maximal degree in co-relation 77427. Up to 1887 conditions per place. [2024-01-27 15:58:05,327 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 770 selfloop transitions, 1157 changer transitions 43/1971 dead transitions. [2024-01-27 15:58:05,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1971 transitions, 48231 flow [2024-01-27 15:58:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:58:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:58:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 414 transitions. [2024-01-27 15:58:05,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40233236151603496 [2024-01-27 15:58:05,329 INFO L175 Difference]: Start difference. First operand has 401 places, 1173 transitions, 27570 flow. Second operand 49 states and 414 transitions. [2024-01-27 15:58:05,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1971 transitions, 48231 flow [2024-01-27 15:58:08,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1971 transitions, 47770 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-01-27 15:58:08,580 INFO L231 Difference]: Finished difference. Result has 465 places, 1691 transitions, 44180 flow [2024-01-27 15:58:08,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27038, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=699, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=44180, PETRI_PLACES=465, PETRI_TRANSITIONS=1691} [2024-01-27 15:58:08,581 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 443 predicate places. [2024-01-27 15:58:08,581 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1691 transitions, 44180 flow [2024-01-27 15:58:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:58:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:08,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:08,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:08,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:58:08,782 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:08,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash 402732704, now seen corresponding path program 17 times [2024-01-27 15:58:08,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:08,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216987292] [2024-01-27 15:58:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:08,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:08,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:08,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216987292] [2024-01-27 15:58:08,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216987292] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:08,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438427168] [2024-01-27 15:58:08,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:58:08,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:08,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:08,950 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:08,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:58:09,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:58:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:09,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:58:09,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:09,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:09,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:09,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438427168] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:09,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:09,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:58:09,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719221892] [2024-01-27 15:58:09,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:09,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:58:09,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:09,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:58:09,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:58:09,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:09,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1691 transitions, 44180 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 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 15:58:09,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:09,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:09,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:14,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:18,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:22,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:58:27,607 INFO L124 PetriNetUnfolderBase]: 4429/9246 cut-off events. [2024-01-27 15:58:27,607 INFO L125 PetriNetUnfolderBase]: For 220319/220319 co-relation queries the response was YES. [2024-01-27 15:58:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97101 conditions, 9246 events. 4429/9246 cut-off events. For 220319/220319 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 80709 event pairs, 102 based on Foata normal form. 60/9306 useless extension candidates. Maximal degree in co-relation 96335. Up to 3368 conditions per place. [2024-01-27 15:58:27,709 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1213 selfloop transitions, 908 changer transitions 10/2132 dead transitions. [2024-01-27 15:58:27,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2132 transitions, 58309 flow [2024-01-27 15:58:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:58:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:58:27,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 316 transitions. [2024-01-27 15:58:27,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42993197278911566 [2024-01-27 15:58:27,712 INFO L175 Difference]: Start difference. First operand has 465 places, 1691 transitions, 44180 flow. Second operand 35 states and 316 transitions. [2024-01-27 15:58:27,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2132 transitions, 58309 flow [2024-01-27 15:58:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 2132 transitions, 55837 flow, removed 1127 selfloop flow, removed 10 redundant places. [2024-01-27 15:58:33,032 INFO L231 Difference]: Finished difference. Result has 499 places, 1907 transitions, 51617 flow [2024-01-27 15:58:33,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=42404, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=51617, PETRI_PLACES=499, PETRI_TRANSITIONS=1907} [2024-01-27 15:58:33,034 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 477 predicate places. [2024-01-27 15:58:33,034 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1907 transitions, 51617 flow [2024-01-27 15:58:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 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 15:58:33,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:33,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:33,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:58:33,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:58:33,245 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:33,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash 984797792, now seen corresponding path program 18 times [2024-01-27 15:58:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792519669] [2024-01-27 15:58:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:33,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792519669] [2024-01-27 15:58:33,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792519669] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:33,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137745610] [2024-01-27 15:58:33,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:58:33,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:33,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:33,418 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:33,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:58:33,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:58:33,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:58:33,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:58:33,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:33,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:58:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137745610] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:33,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:33,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:58:33,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833126666] [2024-01-27 15:58:33,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:33,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:58:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:58:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:58:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1907 transitions, 51617 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:58:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:41,341 INFO L124 PetriNetUnfolderBase]: 4885/10025 cut-off events. [2024-01-27 15:58:41,341 INFO L125 PetriNetUnfolderBase]: For 261170/261170 co-relation queries the response was YES. [2024-01-27 15:58:41,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110223 conditions, 10025 events. 4885/10025 cut-off events. For 261170/261170 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 87890 event pairs, 28 based on Foata normal form. 72/10097 useless extension candidates. Maximal degree in co-relation 109675. Up to 4191 conditions per place. [2024-01-27 15:58:41,459 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 984 selfloop transitions, 1341 changer transitions 2/2328 dead transitions. [2024-01-27 15:58:41,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 2328 transitions, 67200 flow [2024-01-27 15:58:41,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:58:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:58:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 323 transitions. [2024-01-27 15:58:41,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495670995670996 [2024-01-27 15:58:41,461 INFO L175 Difference]: Start difference. First operand has 499 places, 1907 transitions, 51617 flow. Second operand 44 states and 323 transitions. [2024-01-27 15:58:41,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 2328 transitions, 67200 flow [2024-01-27 15:58:48,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2328 transitions, 65693 flow, removed 490 selfloop flow, removed 15 redundant places. [2024-01-27 15:58:48,891 INFO L231 Difference]: Finished difference. Result has 540 places, 2173 transitions, 63039 flow [2024-01-27 15:58:48,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50214, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=63039, PETRI_PLACES=540, PETRI_TRANSITIONS=2173} [2024-01-27 15:58:48,892 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 518 predicate places. [2024-01-27 15:58:48,893 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2173 transitions, 63039 flow [2024-01-27 15:58:48,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 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 15:58:48,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:58:48,893 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:58:48,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:58:49,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:58:49,093 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:58:49,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:58:49,094 INFO L85 PathProgramCache]: Analyzing trace with hash -822439830, now seen corresponding path program 19 times [2024-01-27 15:58:49,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:58:49,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820173008] [2024-01-27 15:58:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:58:49,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:58:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:58:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:58:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820173008] [2024-01-27 15:58:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820173008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:58:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060646744] [2024-01-27 15:58:49,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:58:49,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:58:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:58:49,220 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:58:49,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:58:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:58:49,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:58:49,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:58:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:58:49,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:58:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:58:49,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060646744] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:58:49,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:58:49,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:58:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820918237] [2024-01-27 15:58:49,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:58:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:58:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:58:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:58:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:58:49,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:58:49,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2173 transitions, 63039 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 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 15:58:49,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:58:49,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:58:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:58:58,788 INFO L124 PetriNetUnfolderBase]: 4916/10061 cut-off events. [2024-01-27 15:58:58,788 INFO L125 PetriNetUnfolderBase]: For 295199/295199 co-relation queries the response was YES. [2024-01-27 15:58:58,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116387 conditions, 10061 events. 4916/10061 cut-off events. For 295199/295199 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 88086 event pairs, 88 based on Foata normal form. 12/10073 useless extension candidates. Maximal degree in co-relation 115943. Up to 6407 conditions per place. [2024-01-27 15:58:58,940 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1311 selfloop transitions, 908 changer transitions 1/2221 dead transitions. [2024-01-27 15:58:58,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 2221 transitions, 68125 flow [2024-01-27 15:58:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:58:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:58:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2024-01-27 15:58:58,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-01-27 15:58:58,941 INFO L175 Difference]: Start difference. First operand has 540 places, 2173 transitions, 63039 flow. Second operand 15 states and 133 transitions. [2024-01-27 15:58:58,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 2221 transitions, 68125 flow [2024-01-27 15:59:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 2221 transitions, 66874 flow, removed 311 selfloop flow, removed 18 redundant places. [2024-01-27 15:59:07,131 INFO L231 Difference]: Finished difference. Result has 540 places, 2183 transitions, 63871 flow [2024-01-27 15:59:07,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=61790, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=63871, PETRI_PLACES=540, PETRI_TRANSITIONS=2183} [2024-01-27 15:59:07,133 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 518 predicate places. [2024-01-27 15:59:07,133 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2183 transitions, 63871 flow [2024-01-27 15:59:07,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 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 15:59:07,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:07,134 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:07,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:07,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:07,345 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:07,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash 700787182, now seen corresponding path program 20 times [2024-01-27 15:59:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195230937] [2024-01-27 15:59:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:59:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195230937] [2024-01-27 15:59:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195230937] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90913495] [2024-01-27 15:59:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:59:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:07,492 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:07,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:59:07,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:59:07,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:07,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:59:07,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:59:07,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:59:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90913495] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:07,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:59:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770272431] [2024-01-27 15:59:07,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:59:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:59:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:59:07,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:07,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2183 transitions, 63871 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 15:59:07,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:07,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:07,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:29,196 INFO L124 PetriNetUnfolderBase]: 5079/10400 cut-off events. [2024-01-27 15:59:29,196 INFO L125 PetriNetUnfolderBase]: For 320953/320953 co-relation queries the response was YES. [2024-01-27 15:59:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120119 conditions, 10400 events. 5079/10400 cut-off events. For 320953/320953 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 91597 event pairs, 64 based on Foata normal form. 28/10428 useless extension candidates. Maximal degree in co-relation 119363. Up to 4010 conditions per place. [2024-01-27 15:59:29,318 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1308 selfloop transitions, 1017 changer transitions 1/2327 dead transitions. [2024-01-27 15:59:29,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 2327 transitions, 71095 flow [2024-01-27 15:59:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:59:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:59:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 268 transitions. [2024-01-27 15:59:29,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38672438672438675 [2024-01-27 15:59:29,319 INFO L175 Difference]: Start difference. First operand has 540 places, 2183 transitions, 63871 flow. Second operand 33 states and 268 transitions. [2024-01-27 15:59:29,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 2327 transitions, 71095 flow [2024-01-27 15:59:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 2327 transitions, 70751 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-01-27 15:59:37,214 INFO L231 Difference]: Finished difference. Result has 576 places, 2249 transitions, 67610 flow [2024-01-27 15:59:37,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=63529, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=67610, PETRI_PLACES=576, PETRI_TRANSITIONS=2249} [2024-01-27 15:59:37,216 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 554 predicate places. [2024-01-27 15:59:37,216 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 2249 transitions, 67610 flow [2024-01-27 15:59:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 15:59:37,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:59:37,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:59:37,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:59:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:59:37,419 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:59:37,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:59:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1284387224, now seen corresponding path program 21 times [2024-01-27 15:59:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:59:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920820766] [2024-01-27 15:59:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:59:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:59:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:59:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:59:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:59:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920820766] [2024-01-27 15:59:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920820766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:59:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273901353] [2024-01-27 15:59:37,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:59:37,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:59:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:59:37,548 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:59:37,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:59:37,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:59:37,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:59:37,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:59:37,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:59:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:59:37,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:59:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:59:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273901353] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:59:37,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:59:37,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-01-27 15:59:37,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021470856] [2024-01-27 15:59:37,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:59:37,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:59:37,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:59:37,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:59:37,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:59:37,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 15:59:37,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 2249 transitions, 67610 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 15:59:37,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:59:37,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 15:59:37,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:59:42,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 15:59:53,927 INFO L124 PetriNetUnfolderBase]: 5238/10703 cut-off events. [2024-01-27 15:59:53,928 INFO L125 PetriNetUnfolderBase]: For 372859/372859 co-relation queries the response was YES. [2024-01-27 15:59:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127382 conditions, 10703 events. 5238/10703 cut-off events. For 372859/372859 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 94532 event pairs, 120 based on Foata normal form. 32/10735 useless extension candidates. Maximal degree in co-relation 126408. Up to 8619 conditions per place. [2024-01-27 15:59:54,138 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1878 selfloop transitions, 497 changer transitions 1/2377 dead transitions. [2024-01-27 15:59:54,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 2377 transitions, 75120 flow [2024-01-27 15:59:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:59:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:59:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 215 transitions. [2024-01-27 15:59:54,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42658730158730157 [2024-01-27 15:59:54,140 INFO L175 Difference]: Start difference. First operand has 576 places, 2249 transitions, 67610 flow. Second operand 24 states and 215 transitions. [2024-01-27 15:59:54,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 2377 transitions, 75120 flow [2024-01-27 16:00:03,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2377 transitions, 70763 flow, removed 619 selfloop flow, removed 24 redundant places. [2024-01-27 16:00:03,692 INFO L231 Difference]: Finished difference. Result has 587 places, 2290 transitions, 66384 flow [2024-01-27 16:00:03,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=63848, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=66384, PETRI_PLACES=587, PETRI_TRANSITIONS=2290} [2024-01-27 16:00:03,695 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 565 predicate places. [2024-01-27 16:00:03,695 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 2290 transitions, 66384 flow [2024-01-27 16:00:03,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:00:03,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:03,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:03,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 16:00:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:03,904 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:00:03,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -248458224, now seen corresponding path program 22 times [2024-01-27 16:00:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:03,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743239061] [2024-01-27 16:00:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743239061] [2024-01-27 16:00:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743239061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:04,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926642618] [2024-01-27 16:00:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:00:04,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:04,038 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:00:04,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 16:00:04,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:00:04,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:04,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:00:04,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:04,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926642618] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:04,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 16:00:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680275686] [2024-01-27 16:00:04,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:00:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:00:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:00:04,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:04,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 2290 transitions, 66384 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:00:04,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:04,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:04,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:00:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:00:15,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:00:22,242 INFO L124 PetriNetUnfolderBase]: 5359/10979 cut-off events. [2024-01-27 16:00:22,242 INFO L125 PetriNetUnfolderBase]: For 361974/361974 co-relation queries the response was YES. [2024-01-27 16:00:22,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127987 conditions, 10979 events. 5359/10979 cut-off events. For 361974/361974 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 97838 event pairs, 72 based on Foata normal form. 22/11001 useless extension candidates. Maximal degree in co-relation 127188. Up to 5943 conditions per place. [2024-01-27 16:00:22,389 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 1756 selfloop transitions, 666 changer transitions 2/2425 dead transitions. [2024-01-27 16:00:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 2425 transitions, 73839 flow [2024-01-27 16:00:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-27 16:00:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-27 16:00:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 245 transitions. [2024-01-27 16:00:22,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-27 16:00:22,390 INFO L175 Difference]: Start difference. First operand has 587 places, 2290 transitions, 66384 flow. Second operand 28 states and 245 transitions. [2024-01-27 16:00:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 2425 transitions, 73839 flow [2024-01-27 16:00:31,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 2425 transitions, 73385 flow, removed 105 selfloop flow, removed 8 redundant places. [2024-01-27 16:00:31,489 INFO L231 Difference]: Finished difference. Result has 610 places, 2336 transitions, 69006 flow [2024-01-27 16:00:31,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=65811, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=69006, PETRI_PLACES=610, PETRI_TRANSITIONS=2336} [2024-01-27 16:00:31,491 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 588 predicate places. [2024-01-27 16:00:31,491 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 2336 transitions, 69006 flow [2024-01-27 16:00:31,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:00:31,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:00:31,492 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:00:31,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-27 16:00:31,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-01-27 16:00:31,696 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:00:31,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:00:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 377193042, now seen corresponding path program 23 times [2024-01-27 16:00:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:00:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636406896] [2024-01-27 16:00:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:00:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:00:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:00:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:31,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:00:31,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636406896] [2024-01-27 16:00:31,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636406896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:00:31,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435124599] [2024-01-27 16:00:31,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:00:31,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:00:31,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:00:31,840 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:00:31,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-27 16:00:31,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 16:00:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:00:31,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:00:31,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:00:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:32,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:00:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:00:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435124599] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:00:32,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:00:32,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 16:00:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317200114] [2024-01-27 16:00:32,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:00:32,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:00:32,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:00:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:00:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:00:32,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:00:32,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 2336 transitions, 69006 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 16:00:32,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:00:32,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:00:32,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:01,488 INFO L124 PetriNetUnfolderBase]: 5413/11087 cut-off events. [2024-01-27 16:01:01,488 INFO L125 PetriNetUnfolderBase]: For 400963/400963 co-relation queries the response was YES. [2024-01-27 16:01:01,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131951 conditions, 11087 events. 5413/11087 cut-off events. For 400963/400963 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 98987 event pairs, 1494 based on Foata normal form. 20/11107 useless extension candidates. Maximal degree in co-relation 131099. Up to 7271 conditions per place. [2024-01-27 16:01:01,662 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2053 selfloop transitions, 382 changer transitions 0/2436 dead transitions. [2024-01-27 16:01:01,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 2436 transitions, 75630 flow [2024-01-27 16:01:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 16:01:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 16:01:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 205 transitions. [2024-01-27 16:01:01,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-01-27 16:01:01,663 INFO L175 Difference]: Start difference. First operand has 610 places, 2336 transitions, 69006 flow. Second operand 24 states and 205 transitions. [2024-01-27 16:01:01,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 2436 transitions, 75630 flow [2024-01-27 16:01:11,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 2436 transitions, 74524 flow, removed 410 selfloop flow, removed 15 redundant places. [2024-01-27 16:01:11,533 INFO L231 Difference]: Finished difference. Result has 625 places, 2369 transitions, 70059 flow [2024-01-27 16:01:11,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=67826, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=70059, PETRI_PLACES=625, PETRI_TRANSITIONS=2369} [2024-01-27 16:01:11,535 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 603 predicate places. [2024-01-27 16:01:11,535 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 2369 transitions, 70059 flow [2024-01-27 16:01:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 16:01:11,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:11,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:11,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:11,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:11,747 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:11,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1303564316, now seen corresponding path program 24 times [2024-01-27 16:01:11,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:11,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831808885] [2024-01-27 16:01:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:11,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831808885] [2024-01-27 16:01:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831808885] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315924986] [2024-01-27 16:01:11,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:01:11,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:11,871 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:11,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-27 16:01:12,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 16:01:12,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:01:12,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:01:12,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:01:12,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:01:12,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315924986] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:12,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-27 16:01:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887035182] [2024-01-27 16:01:12,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:12,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:01:12,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:01:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:01:12,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 2369 transitions, 70059 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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 16:01:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:16,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:01:21,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:01:29,325 INFO L124 PetriNetUnfolderBase]: 5457/11205 cut-off events. [2024-01-27 16:01:29,325 INFO L125 PetriNetUnfolderBase]: For 416754/416754 co-relation queries the response was YES. [2024-01-27 16:01:29,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133808 conditions, 11205 events. 5457/11205 cut-off events. For 416754/416754 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 100472 event pairs, 1552 based on Foata normal form. 10/11215 useless extension candidates. Maximal degree in co-relation 133002. Up to 6774 conditions per place. [2024-01-27 16:01:29,479 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2136 selfloop transitions, 304 changer transitions 10/2451 dead transitions. [2024-01-27 16:01:29,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 645 places, 2451 transitions, 76473 flow [2024-01-27 16:01:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 16:01:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 16:01:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2024-01-27 16:01:29,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36961451247165533 [2024-01-27 16:01:29,480 INFO L175 Difference]: Start difference. First operand has 625 places, 2369 transitions, 70059 flow. Second operand 21 states and 163 transitions. [2024-01-27 16:01:29,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 645 places, 2451 transitions, 76473 flow [2024-01-27 16:01:39,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2451 transitions, 75951 flow, removed 208 selfloop flow, removed 11 redundant places. [2024-01-27 16:01:39,365 INFO L231 Difference]: Finished difference. Result has 641 places, 2380 transitions, 70753 flow [2024-01-27 16:01:39,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=69467, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2068, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=70753, PETRI_PLACES=641, PETRI_TRANSITIONS=2380} [2024-01-27 16:01:39,367 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 619 predicate places. [2024-01-27 16:01:39,368 INFO L495 AbstractCegarLoop]: Abstraction has has 641 places, 2380 transitions, 70753 flow [2024-01-27 16:01:39,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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 16:01:39,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:01:39,368 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:01:39,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-27 16:01:39,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:39,584 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:01:39,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:01:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -920951042, now seen corresponding path program 25 times [2024-01-27 16:01:39,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:01:39,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912431139] [2024-01-27 16:01:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:01:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:01:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:01:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912431139] [2024-01-27 16:01:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912431139] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:01:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877861650] [2024-01-27 16:01:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:01:39,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:01:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:01:39,744 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:01:39,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-27 16:01:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:01:39,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:01:39,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:01:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:39,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:01:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:01:40,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877861650] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:01:40,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:01:40,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 16:01:40,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135309809] [2024-01-27 16:01:40,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:01:40,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:01:40,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:01:40,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:01:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:01:40,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:01:40,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 2380 transitions, 70753 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 16:01:40,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:01:40,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:01:40,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:01:46,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:01:54,901 INFO L124 PetriNetUnfolderBase]: 5499/11253 cut-off events. [2024-01-27 16:01:54,901 INFO L125 PetriNetUnfolderBase]: For 435089/435089 co-relation queries the response was YES. [2024-01-27 16:01:55,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136255 conditions, 11253 events. 5499/11253 cut-off events. For 435089/435089 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 100757 event pairs, 2030 based on Foata normal form. 32/11285 useless extension candidates. Maximal degree in co-relation 135756. Up to 10276 conditions per place. [2024-01-27 16:01:55,062 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2228 selfloop transitions, 233 changer transitions 0/2462 dead transitions. [2024-01-27 16:01:55,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 2462 transitions, 77040 flow [2024-01-27 16:01:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 16:01:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 16:01:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 192 transitions. [2024-01-27 16:01:55,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39751552795031053 [2024-01-27 16:01:55,064 INFO L175 Difference]: Start difference. First operand has 641 places, 2380 transitions, 70753 flow. Second operand 23 states and 192 transitions. [2024-01-27 16:01:55,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 2462 transitions, 77040 flow [2024-01-27 16:02:04,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 2462 transitions, 76816 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-01-27 16:02:04,612 INFO L231 Difference]: Finished difference. Result has 660 places, 2396 transitions, 71789 flow [2024-01-27 16:02:04,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=70304, PETRI_DIFFERENCE_MINUEND_PLACES=630, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=71789, PETRI_PLACES=660, PETRI_TRANSITIONS=2396} [2024-01-27 16:02:04,614 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 638 predicate places. [2024-01-27 16:02:04,614 INFO L495 AbstractCegarLoop]: Abstraction has has 660 places, 2396 transitions, 71789 flow [2024-01-27 16:02:04,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 16:02:04,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:02:04,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:02:04,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-27 16:02:04,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:02:04,820 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:02:04,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:02:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1636543388, now seen corresponding path program 26 times [2024-01-27 16:02:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:02:04,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794941032] [2024-01-27 16:02:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:02:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:02:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:02:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:02:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:02:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794941032] [2024-01-27 16:02:04,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794941032] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:02:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847782196] [2024-01-27 16:02:04,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:02:04,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:02:04,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:02:04,944 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:02:04,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-27 16:02:05,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:02:05,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:02:05,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:02:05,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:02:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:02:05,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:02:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:02:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847782196] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:02:05,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:02:05,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-27 16:02:05,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137201695] [2024-01-27 16:02:05,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:02:05,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 16:02:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:02:05,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 16:02:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-01-27 16:02:05,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:02:05,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 2396 transitions, 71789 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 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 16:02:05,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:02:05,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:02:05,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:02:07,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:02:21,140 INFO L124 PetriNetUnfolderBase]: 5637/11515 cut-off events. [2024-01-27 16:02:21,140 INFO L125 PetriNetUnfolderBase]: For 466616/466616 co-relation queries the response was YES. [2024-01-27 16:02:21,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141102 conditions, 11515 events. 5637/11515 cut-off events. For 466616/466616 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 103319 event pairs, 2131 based on Foata normal form. 46/11561 useless extension candidates. Maximal degree in co-relation 140616. Up to 10727 conditions per place. [2024-01-27 16:02:21,302 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2363 selfloop transitions, 164 changer transitions 0/2528 dead transitions. [2024-01-27 16:02:21,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 2528 transitions, 79549 flow [2024-01-27 16:02:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 16:02:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 16:02:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 248 transitions. [2024-01-27 16:02:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072249589490969 [2024-01-27 16:02:21,303 INFO L175 Difference]: Start difference. First operand has 660 places, 2396 transitions, 71789 flow. Second operand 29 states and 248 transitions. [2024-01-27 16:02:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 2528 transitions, 79549 flow [2024-01-27 16:02:31,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 2528 transitions, 79176 flow, removed 143 selfloop flow, removed 9 redundant places. [2024-01-27 16:02:31,248 INFO L231 Difference]: Finished difference. Result has 694 places, 2442 transitions, 73542 flow [2024-01-27 16:02:31,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=71362, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=73542, PETRI_PLACES=694, PETRI_TRANSITIONS=2442} [2024-01-27 16:02:31,250 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 672 predicate places. [2024-01-27 16:02:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 2442 transitions, 73542 flow [2024-01-27 16:02:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 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 16:02:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:02:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:02:31,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-27 16:02:31,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-27 16:02:31,451 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:02:31,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:02:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash 881694360, now seen corresponding path program 27 times [2024-01-27 16:02:31,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:02:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268865540] [2024-01-27 16:02:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:02:31,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:02:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:02:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:02:31,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:02:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268865540] [2024-01-27 16:02:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268865540] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:02:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356655576] [2024-01-27 16:02:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:02:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:02:31,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:02:31,585 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:02:31,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-27 16:02:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 16:02:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:02:31,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:02:31,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:02:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:02:31,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:02:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:02:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356655576] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:02:31,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:02:31,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 16:02:31,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698392180] [2024-01-27 16:02:31,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:02:31,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:02:31,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:02:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:02:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:02:31,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:02:31,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 2442 transitions, 73542 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:02:31,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:02:31,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:02:31,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:02:37,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:02:41,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:02:46,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:02:54,958 INFO L124 PetriNetUnfolderBase]: 5687/11623 cut-off events. [2024-01-27 16:02:54,958 INFO L125 PetriNetUnfolderBase]: For 495918/495918 co-relation queries the response was YES. [2024-01-27 16:02:55,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144282 conditions, 11623 events. 5687/11623 cut-off events. For 495918/495918 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 104580 event pairs, 1649 based on Foata normal form. 32/11655 useless extension candidates. Maximal degree in co-relation 143914. Up to 7878 conditions per place. [2024-01-27 16:02:55,136 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2179 selfloop transitions, 359 changer transitions 1/2540 dead transitions. [2024-01-27 16:02:55,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 2540 transitions, 81034 flow [2024-01-27 16:02:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 16:02:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 16:02:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 190 transitions. [2024-01-27 16:02:55,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308390022675737 [2024-01-27 16:02:55,137 INFO L175 Difference]: Start difference. First operand has 694 places, 2442 transitions, 73542 flow. Second operand 21 states and 190 transitions. [2024-01-27 16:02:55,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 2540 transitions, 81034 flow [2024-01-27 16:03:05,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 704 places, 2540 transitions, 80249 flow, removed 347 selfloop flow, removed 8 redundant places. [2024-01-27 16:03:05,508 INFO L231 Difference]: Finished difference. Result has 709 places, 2471 transitions, 75256 flow [2024-01-27 16:03:05,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=72672, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2099, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=75256, PETRI_PLACES=709, PETRI_TRANSITIONS=2471} [2024-01-27 16:03:05,510 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 687 predicate places. [2024-01-27 16:03:05,510 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 2471 transitions, 75256 flow [2024-01-27 16:03:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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 16:03:05,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:03:05,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:03:05,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-27 16:03:05,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-27 16:03:05,711 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:03:05,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:03:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2103633448, now seen corresponding path program 28 times [2024-01-27 16:03:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:03:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872936307] [2024-01-27 16:03:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:03:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:03:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:03:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:03:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:03:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872936307] [2024-01-27 16:03:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872936307] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:03:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759272628] [2024-01-27 16:03:05,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:03:05,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:05,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:03:05,850 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:03:05,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-27 16:03:05,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:03:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:03:05,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:03:05,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:03:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:03:06,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:03:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:03:06,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759272628] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:03:06,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:03:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 16:03:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342951918] [2024-01-27 16:03:06,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:03:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:03:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:03:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:03:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:03:06,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:03:06,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 2471 transitions, 75256 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 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 16:03:06,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:03:06,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:03:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:03:15,858 INFO L124 PetriNetUnfolderBase]: 5717/11710 cut-off events. [2024-01-27 16:03:15,858 INFO L125 PetriNetUnfolderBase]: For 531561/531561 co-relation queries the response was YES. [2024-01-27 16:03:15,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147182 conditions, 11710 events. 5717/11710 cut-off events. For 531561/531561 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 105568 event pairs, 1707 based on Foata normal form. 20/11730 useless extension candidates. Maximal degree in co-relation 146669. Up to 8122 conditions per place. [2024-01-27 16:03:16,043 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2229 selfloop transitions, 324 changer transitions 0/2554 dead transitions. [2024-01-27 16:03:16,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 2554 transitions, 82157 flow [2024-01-27 16:03:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 16:03:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 16:03:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 194 transitions. [2024-01-27 16:03:16,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40165631469979296 [2024-01-27 16:03:16,044 INFO L175 Difference]: Start difference. First operand has 709 places, 2471 transitions, 75256 flow. Second operand 23 states and 194 transitions. [2024-01-27 16:03:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 2554 transitions, 82157 flow [2024-01-27 16:03:27,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 2554 transitions, 81193 flow, removed 437 selfloop flow, removed 8 redundant places. [2024-01-27 16:03:27,393 INFO L231 Difference]: Finished difference. Result has 728 places, 2493 transitions, 76136 flow [2024-01-27 16:03:27,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=74422, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=76136, PETRI_PLACES=728, PETRI_TRANSITIONS=2493} [2024-01-27 16:03:27,395 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 706 predicate places. [2024-01-27 16:03:27,395 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 2493 transitions, 76136 flow [2024-01-27 16:03:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 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 16:03:27,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:03:27,396 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:03:27,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-27 16:03:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:27,596 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:03:27,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:03:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash 340804496, now seen corresponding path program 29 times [2024-01-27 16:03:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:03:27,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688199197] [2024-01-27 16:03:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:03:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:03:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:03:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:03:27,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:03:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688199197] [2024-01-27 16:03:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688199197] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:03:27,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518777352] [2024-01-27 16:03:27,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 16:03:27,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:27,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:03:27,713 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:03:27,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-27 16:03:27,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 16:03:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:03:27,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:03:27,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:03:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:03:27,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:03:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:03:27,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518777352] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:03:27,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:03:27,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-01-27 16:03:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118245834] [2024-01-27 16:03:27,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:03:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:03:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:03:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:03:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:03:27,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:03:27,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 2493 transitions, 76136 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:03:27,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:03:27,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:03:27,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:03:32,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:36,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:03:46,373 INFO L124 PetriNetUnfolderBase]: 5824/11944 cut-off events. [2024-01-27 16:03:46,373 INFO L125 PetriNetUnfolderBase]: For 565336/565336 co-relation queries the response was YES. [2024-01-27 16:03:46,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151024 conditions, 11944 events. 5824/11944 cut-off events. For 565336/565336 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 108303 event pairs, 2159 based on Foata normal form. 20/11964 useless extension candidates. Maximal degree in co-relation 150498. Up to 10746 conditions per place. [2024-01-27 16:03:46,723 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2352 selfloop transitions, 217 changer transitions 0/2570 dead transitions. [2024-01-27 16:03:46,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2570 transitions, 82937 flow [2024-01-27 16:03:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 16:03:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 16:03:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 159 transitions. [2024-01-27 16:03:46,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849624060150374 [2024-01-27 16:03:46,724 INFO L175 Difference]: Start difference. First operand has 728 places, 2493 transitions, 76136 flow. Second operand 19 states and 159 transitions. [2024-01-27 16:03:46,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2570 transitions, 82937 flow [2024-01-27 16:03:58,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 734 places, 2570 transitions, 82117 flow, removed 243 selfloop flow, removed 12 redundant places. [2024-01-27 16:03:58,209 INFO L231 Difference]: Finished difference. Result has 737 places, 2519 transitions, 76910 flow [2024-01-27 16:03:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=75210, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=76910, PETRI_PLACES=737, PETRI_TRANSITIONS=2519} [2024-01-27 16:03:58,211 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 715 predicate places. [2024-01-27 16:03:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 737 places, 2519 transitions, 76910 flow [2024-01-27 16:03:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:03:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:03:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:03:58,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-27 16:03:58,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-27 16:03:58,420 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:03:58,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:03:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash -975352808, now seen corresponding path program 30 times [2024-01-27 16:03:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:03:58,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546316877] [2024-01-27 16:03:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:03:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:03:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:03:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:03:58,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:03:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546316877] [2024-01-27 16:03:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546316877] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:03:58,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387982025] [2024-01-27 16:03:58,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 16:03:58,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:03:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:03:58,529 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:03:58,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-27 16:03:58,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 16:03:58,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:03:58,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:03:58,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:03:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:03:58,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:03:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:03:58,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387982025] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:03:58,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:03:58,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-01-27 16:03:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100301695] [2024-01-27 16:03:58,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:03:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 16:03:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:03:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 16:03:58,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-01-27 16:03:58,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:03:58,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2519 transitions, 76910 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:03:58,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:03:58,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:03:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:07,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:04:17,118 INFO L124 PetriNetUnfolderBase]: 5807/11880 cut-off events. [2024-01-27 16:04:17,118 INFO L125 PetriNetUnfolderBase]: For 562369/562369 co-relation queries the response was YES. [2024-01-27 16:04:17,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150988 conditions, 11880 events. 5807/11880 cut-off events. For 562369/562369 co-relation queries the response was YES. Maximal size of possible extension queue 873. Compared 107265 event pairs, 1672 based on Foata normal form. 6/11886 useless extension candidates. Maximal degree in co-relation 150456. Up to 7290 conditions per place. [2024-01-27 16:04:17,294 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2285 selfloop transitions, 296 changer transitions 2/2584 dead transitions. [2024-01-27 16:04:17,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 2584 transitions, 83355 flow [2024-01-27 16:04:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 16:04:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 16:04:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 171 transitions. [2024-01-27 16:04:17,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35403726708074534 [2024-01-27 16:04:17,295 INFO L175 Difference]: Start difference. First operand has 737 places, 2519 transitions, 76910 flow. Second operand 23 states and 171 transitions. [2024-01-27 16:04:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 2584 transitions, 83355 flow [2024-01-27 16:04:28,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 2584 transitions, 83019 flow, removed 119 selfloop flow, removed 12 redundant places. [2024-01-27 16:04:28,741 INFO L231 Difference]: Finished difference. Result has 749 places, 2524 transitions, 77704 flow [2024-01-27 16:04:28,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=76378, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=77704, PETRI_PLACES=749, PETRI_TRANSITIONS=2524} [2024-01-27 16:04:28,743 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 727 predicate places. [2024-01-27 16:04:28,743 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 2524 transitions, 77704 flow [2024-01-27 16:04:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 16:04:28,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:28,743 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:28,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-27 16:04:28,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-27 16:04:28,944 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:28,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 501390944, now seen corresponding path program 31 times [2024-01-27 16:04:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:28,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841732000] [2024-01-27 16:04:28,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841732000] [2024-01-27 16:04:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841732000] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530621544] [2024-01-27 16:04:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 16:04:29,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:29,079 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:29,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-27 16:04:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:29,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:04:29,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:29,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:29,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530621544] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:29,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:29,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 16:04:29,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148844728] [2024-01-27 16:04:29,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:29,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 16:04:29,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:29,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 16:04:29,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-01-27 16:04:29,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:04:29,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 2524 transitions, 77704 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 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 16:04:29,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:29,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:04:29,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:04:41,410 INFO L124 PetriNetUnfolderBase]: 5883/12006 cut-off events. [2024-01-27 16:04:41,410 INFO L125 PetriNetUnfolderBase]: For 586281/586281 co-relation queries the response was YES. [2024-01-27 16:04:41,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154928 conditions, 12006 events. 5883/12006 cut-off events. For 586281/586281 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 108352 event pairs, 1627 based on Foata normal form. 20/12026 useless extension candidates. Maximal degree in co-relation 154378. Up to 7872 conditions per place. [2024-01-27 16:04:41,600 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2104 selfloop transitions, 532 changer transitions 1/2638 dead transitions. [2024-01-27 16:04:41,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 2638 transitions, 85477 flow [2024-01-27 16:04:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-27 16:04:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-27 16:04:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 243 transitions. [2024-01-27 16:04:41,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-01-27 16:04:41,602 INFO L175 Difference]: Start difference. First operand has 749 places, 2524 transitions, 77704 flow. Second operand 29 states and 243 transitions. [2024-01-27 16:04:41,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 2638 transitions, 85477 flow [2024-01-27 16:04:53,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 2638 transitions, 85218 flow, removed 98 selfloop flow, removed 11 redundant places. [2024-01-27 16:04:53,067 INFO L231 Difference]: Finished difference. Result has 768 places, 2563 transitions, 80486 flow [2024-01-27 16:04:53,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=77342, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2025, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=80486, PETRI_PLACES=768, PETRI_TRANSITIONS=2563} [2024-01-27 16:04:53,069 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 746 predicate places. [2024-01-27 16:04:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 2563 transitions, 80486 flow [2024-01-27 16:04:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 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 16:04:53,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:04:53,069 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:04:53,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-27 16:04:53,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-27 16:04:53,272 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:04:53,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:04:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 667097462, now seen corresponding path program 32 times [2024-01-27 16:04:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:04:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909294138] [2024-01-27 16:04:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:04:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:04:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:04:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 16:04:53,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:04:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909294138] [2024-01-27 16:04:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909294138] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:04:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511664894] [2024-01-27 16:04:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 16:04:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:04:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:04:53,391 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:04:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-27 16:04:53,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 16:04:53,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:04:53,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 16:04:53,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:04:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:04:53,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:04:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:04:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511664894] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:04:53,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:04:53,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-27 16:04:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529319794] [2024-01-27 16:04:53,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:04:53,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 16:04:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:04:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 16:04:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-01-27 16:04:53,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:04:53,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 2563 transitions, 80486 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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 16:04:53,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:04:53,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:04:53,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:05:00,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-27 16:05:08,566 INFO L124 PetriNetUnfolderBase]: 5881/12006 cut-off events. [2024-01-27 16:05:08,566 INFO L125 PetriNetUnfolderBase]: For 599839/599839 co-relation queries the response was YES. [2024-01-27 16:05:08,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157184 conditions, 12006 events. 5881/12006 cut-off events. For 599839/599839 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 108506 event pairs, 1676 based on Foata normal form. 12/12018 useless extension candidates. Maximal degree in co-relation 156667. Up to 7182 conditions per place. [2024-01-27 16:05:08,756 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2263 selfloop transitions, 341 changer transitions 10/2615 dead transitions. [2024-01-27 16:05:08,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 787 places, 2615 transitions, 86791 flow [2024-01-27 16:05:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 16:05:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 16:05:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 159 transitions. [2024-01-27 16:05:08,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-01-27 16:05:08,757 INFO L175 Difference]: Start difference. First operand has 768 places, 2563 transitions, 80486 flow. Second operand 21 states and 159 transitions. [2024-01-27 16:05:08,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 787 places, 2615 transitions, 86791 flow [2024-01-27 16:05:20,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2615 transitions, 85419 flow, removed 433 selfloop flow, removed 19 redundant places. [2024-01-27 16:05:20,626 INFO L231 Difference]: Finished difference. Result has 770 places, 2552 transitions, 79897 flow [2024-01-27 16:05:20,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=78992, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=79897, PETRI_PLACES=770, PETRI_TRANSITIONS=2552} [2024-01-27 16:05:20,628 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 748 predicate places. [2024-01-27 16:05:20,628 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 2552 transitions, 79897 flow [2024-01-27 16:05:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 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 16:05:20,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:20,628 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:20,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-27 16:05:20,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:20,829 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:05:20,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -232591640, now seen corresponding path program 33 times [2024-01-27 16:05:20,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:20,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144611699] [2024-01-27 16:05:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:05:22,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144611699] [2024-01-27 16:05:22,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144611699] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984482188] [2024-01-27 16:05:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 16:05:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:22,237 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:05:22,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-27 16:05:22,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 16:05:22,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:05:22,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 16:05:22,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:22,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:05:22,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 70 [2024-01-27 16:05:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:05:22,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:23,088 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-01-27 16:05:23,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-01-27 16:05:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:05:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984482188] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:23,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 24 [2024-01-27 16:05:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170568893] [2024-01-27 16:05:23,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 16:05:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 16:05:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2024-01-27 16:05:23,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:23,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 2552 transitions, 79897 flow. Second operand has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 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 16:05:23,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:23,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:23,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:05:37,284 INFO L124 PetriNetUnfolderBase]: 7377/14978 cut-off events. [2024-01-27 16:05:37,284 INFO L125 PetriNetUnfolderBase]: For 837596/837596 co-relation queries the response was YES. [2024-01-27 16:05:37,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201829 conditions, 14978 events. 7377/14978 cut-off events. For 837596/837596 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 139301 event pairs, 225 based on Foata normal form. 11/14989 useless extension candidates. Maximal degree in co-relation 201317. Up to 11511 conditions per place. [2024-01-27 16:05:37,641 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2709 selfloop transitions, 537 changer transitions 11/3258 dead transitions. [2024-01-27 16:05:37,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 3258 transitions, 108801 flow [2024-01-27 16:05:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 16:05:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 16:05:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 322 transitions. [2024-01-27 16:05:37,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-01-27 16:05:37,644 INFO L175 Difference]: Start difference. First operand has 770 places, 2552 transitions, 79897 flow. Second operand 33 states and 322 transitions. [2024-01-27 16:05:37,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 3258 transitions, 108801 flow [2024-01-27 16:05:52,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 787 places, 3258 transitions, 108427 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-01-27 16:05:52,761 INFO L231 Difference]: Finished difference. Result has 797 places, 2958 transitions, 95892 flow [2024-01-27 16:05:52,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=79661, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=95892, PETRI_PLACES=797, PETRI_TRANSITIONS=2958} [2024-01-27 16:05:52,764 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 775 predicate places. [2024-01-27 16:05:52,764 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 2958 transitions, 95892 flow [2024-01-27 16:05:52,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.12) internal successors, (128), 25 states have internal predecessors, (128), 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 16:05:52,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:05:52,764 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:05:52,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-27 16:05:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:52,965 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 16:05:52,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:05:52,965 INFO L85 PathProgramCache]: Analyzing trace with hash 94284732, now seen corresponding path program 34 times [2024-01-27 16:05:52,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:05:52,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038972998] [2024-01-27 16:05:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:05:52,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:05:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:05:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:05:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:05:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038972998] [2024-01-27 16:05:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038972998] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:05:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745971822] [2024-01-27 16:05:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 16:05:54,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:05:54,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:05:54,137 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 16:05:54,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-27 16:05:54,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 16:05:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 16:05:54,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 16:05:54,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:05:54,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 16:05:54,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 76 [2024-01-27 16:05:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 16:05:54,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:05:54,956 INFO L349 Elim1Store]: treesize reduction 20, result has 92.7 percent of original size [2024-01-27 16:05:54,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 67 treesize of output 304 [2024-01-27 16:05:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 16:05:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745971822] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:05:55,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:05:55,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 23 [2024-01-27 16:05:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567726152] [2024-01-27 16:05:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:05:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 16:05:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:05:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 16:05:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-01-27 16:05:55,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-27 16:05:55,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 2958 transitions, 95892 flow. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 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 16:05:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:05:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-27 16:05:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:06:13,797 INFO L124 PetriNetUnfolderBase]: 8830/18098 cut-off events. [2024-01-27 16:06:13,798 INFO L125 PetriNetUnfolderBase]: For 1167510/1167510 co-relation queries the response was YES. [2024-01-27 16:06:14,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254824 conditions, 18098 events. 8830/18098 cut-off events. For 1167510/1167510 co-relation queries the response was YES. Maximal size of possible extension queue 1295. Compared 174764 event pairs, 455 based on Foata normal form. 21/18119 useless extension candidates. Maximal degree in co-relation 254303. Up to 13893 conditions per place. [2024-01-27 16:06:14,100 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2956 selfloop transitions, 631 changer transitions 21/3609 dead transitions. [2024-01-27 16:06:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 3609 transitions, 126217 flow [2024-01-27 16:06:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 16:06:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 16:06:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 246 transitions. [2024-01-27 16:06:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-01-27 16:06:14,101 INFO L175 Difference]: Start difference. First operand has 797 places, 2958 transitions, 95892 flow. Second operand 27 states and 246 transitions. [2024-01-27 16:06:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 3609 transitions, 126217 flow