./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:04:55,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:04:56,027 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:04:56,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:04:56,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:04:56,056 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:04:56,057 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:04:56,057 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:04:56,058 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:04:56,060 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:04:56,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:04:56,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:04:56,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:04:56,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:04:56,063 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:04:56,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:04:56,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:04:56,064 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:04:56,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:04:56,064 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:04:56,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:04:56,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:04:56,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:04:56,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:04:56,065 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:04:56,065 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:04:56,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:04:56,066 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:04:56,066 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:04:56,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:04:56,067 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:04:56,067 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:04:56,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:56,068 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:04:56,068 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:04:56,068 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:04:56,068 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:04:56,069 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:04:56,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-01-27 15:04:56,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:04:56,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:04:56,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:04:56,296 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:04:56,296 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:04:56,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-27 15:04:57,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:04:57,547 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:04:57,548 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-27 15:04:57,568 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d80946e/2c06a2fc1dc64f4d934fc3e1528209a7/FLAG2abbd4f5f [2024-01-27 15:04:57,581 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30d80946e/2c06a2fc1dc64f4d934fc3e1528209a7 [2024-01-27 15:04:57,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:04:57,583 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:04:57,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:57,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:04:57,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:04:57,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:57" (1/1) ... [2024-01-27 15:04:57,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c86a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:57, skipping insertion in model container [2024-01-27 15:04:57,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:57" (1/1) ... [2024-01-27 15:04:57,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:04:57,906 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-01-27 15:04:57,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:57,939 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:04:57,974 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i[41530,41543] [2024-01-27 15:04:57,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:58,036 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:04:58,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58 WrapperNode [2024-01-27 15:04:58,036 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:58,037 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:58,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:04:58,038 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:04:58,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,054 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,076 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-01-27 15:04:58,079 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:58,080 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:04:58,080 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:04:58,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:04:58,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,114 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 2, 1]. [2024-01-27 15:04:58,114 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,139 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,141 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:04:58,142 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:04:58,142 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:04:58,142 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:04:58,143 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (1/1) ... [2024-01-27 15:04:58,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:58,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:04:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:04:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 15:04:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 15:04:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 15:04:58,215 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 15:04:58,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:04:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:04:58,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:04:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:04:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:04:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:04:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:04:58,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:04:58,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:04:58,219 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:04:58,333 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:04:58,334 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:04:58,541 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:04:58,541 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:04:58,744 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:04:58,744 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:04:58,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:58 BoogieIcfgContainer [2024-01-27 15:04:58,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:04:58,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:04:58,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:04:58,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:04:58,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:04:57" (1/3) ... [2024-01-27 15:04:58,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0d4a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:58, skipping insertion in model container [2024-01-27 15:04:58,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:58" (2/3) ... [2024-01-27 15:04:58,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0d4a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:58, skipping insertion in model container [2024-01-27 15:04:58,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:58" (3/3) ... [2024-01-27 15:04:58,753 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-27 15:04:58,759 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:04:58,767 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:04:58,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-27 15:04:58,767 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:04:58,830 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:04:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-01-27 15:04:58,889 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-01-27 15:04:58,889 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:04:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-01-27 15:04:58,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-01-27 15:04:58,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-01-27 15:04:58,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:04:58,909 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;@69dd9d59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:04:58,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:04:58,919 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:04:58,920 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-01-27 15:04:58,920 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:04:58,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:58,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:58,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:04:58,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2024-01-27 15:04:58,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:58,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255692539] [2024-01-27 15:04:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:59,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:59,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255692539] [2024-01-27 15:04:59,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255692539] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:59,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:04:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906826191] [2024-01-27 15:04:59,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:04:59,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:04:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:04:59,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:04:59,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:59,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:59,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:04:59,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:59,531 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2024-01-27 15:04:59,531 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-01-27 15:04:59,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2024-01-27 15:04:59,540 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-01-27 15:04:59,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2024-01-27 15:04:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:04:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:04:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-01-27 15:04:59,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-01-27 15:04:59,555 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-01-27 15:04:59,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2024-01-27 15:04:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:04:59,563 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2024-01-27 15:04:59,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-01-27 15:04:59,568 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-01-27 15:04:59,568 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2024-01-27 15:04:59,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:59,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:59,569 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:59,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:04:59,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:04:59,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2024-01-27 15:04:59,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554667590] [2024-01-27 15:04:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:59,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:59,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554667590] [2024-01-27 15:04:59,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554667590] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912230406] [2024-01-27 15:04:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:59,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:59,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:04:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:59,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:04:59,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:59,962 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 8 treesize of output 1 [2024-01-27 15:05:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:00,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:00,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912230406] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:00,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:00,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-01-27 15:05:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949367279] [2024-01-27 15:05:00,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:00,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:05:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:05:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:05:00,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:00,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 15:05:00,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:00,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:00,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:00,568 INFO L124 PetriNetUnfolderBase]: 1316/2439 cut-off events. [2024-01-27 15:05:00,568 INFO L125 PetriNetUnfolderBase]: For 275/277 co-relation queries the response was YES. [2024-01-27 15:05:00,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5145 conditions, 2439 events. 1316/2439 cut-off events. For 275/277 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12722 event pairs, 140 based on Foata normal form. 52/2385 useless extension candidates. Maximal degree in co-relation 4556. Up to 377 conditions per place. [2024-01-27 15:05:00,580 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 170 selfloop transitions, 30 changer transitions 6/211 dead transitions. [2024-01-27 15:05:00,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2024-01-27 15:05:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:05:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:05:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-01-27 15:05:00,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-01-27 15:05:00,591 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2024-01-27 15:05:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2024-01-27 15:05:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:05:00,597 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 353 flow [2024-01-27 15:05:00,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=353, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-01-27 15:05:00,598 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2024-01-27 15:05:00,599 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 353 flow [2024-01-27 15:05:00,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 15:05:00,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:00,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:00,616 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 15:05:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:00,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:00,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2024-01-27 15:05:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:00,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103473737] [2024-01-27 15:05:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:00,872 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 15:05:00,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:00,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103473737] [2024-01-27 15:05:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103473737] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:05:00,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:05:00,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:05:00,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238074259] [2024-01-27 15:05:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:05:00,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:05:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:05:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:05:00,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:05:00,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 15:05:00,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:00,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:05:00,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:01,040 INFO L124 PetriNetUnfolderBase]: 743/1518 cut-off events. [2024-01-27 15:05:01,040 INFO L125 PetriNetUnfolderBase]: For 1696/1696 co-relation queries the response was YES. [2024-01-27 15:05:01,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3610 conditions, 1518 events. 743/1518 cut-off events. For 1696/1696 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7560 event pairs, 250 based on Foata normal form. 72/1565 useless extension candidates. Maximal degree in co-relation 3029. Up to 707 conditions per place. [2024-01-27 15:05:01,049 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-01-27 15:05:01,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 376 flow [2024-01-27 15:05:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:05:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:05:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-01-27 15:05:01,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:05:01,050 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 353 flow. Second operand 3 states and 60 transitions. [2024-01-27 15:05:01,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 376 flow [2024-01-27 15:05:01,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 342 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-01-27 15:05:01,060 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 229 flow [2024-01-27 15:05:01,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-01-27 15:05:01,061 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-01-27 15:05:01,061 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 229 flow [2024-01-27 15:05:01,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 15:05:01,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:01,062 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 15:05:01,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:05:01,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:01,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2024-01-27 15:05:01,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:01,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815532847] [2024-01-27 15:05:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:01,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:01,455 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 15:05:01,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815532847] [2024-01-27 15:05:01,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815532847] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:05:01,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:05:01,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:05:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200793203] [2024-01-27 15:05:01,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:05:01,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:05:01,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:05:01,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:05:01,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:05:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 15:05:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:05:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:01,701 INFO L124 PetriNetUnfolderBase]: 919/1874 cut-off events. [2024-01-27 15:05:01,701 INFO L125 PetriNetUnfolderBase]: For 1026/1028 co-relation queries the response was YES. [2024-01-27 15:05:01,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 1874 events. 919/1874 cut-off events. For 1026/1028 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9943 event pairs, 282 based on Foata normal form. 2/1846 useless extension candidates. Maximal degree in co-relation 3775. Up to 1103 conditions per place. [2024-01-27 15:05:01,712 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 58 selfloop transitions, 7 changer transitions 8/85 dead transitions. [2024-01-27 15:05:01,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 486 flow [2024-01-27 15:05:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:05:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:05:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-01-27 15:05:01,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:05:01,714 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 229 flow. Second operand 5 states and 100 transitions. [2024-01-27 15:05:01,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 486 flow [2024-01-27 15:05:01,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:05:01,721 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 287 flow [2024-01-27 15:05:01,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=287, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-01-27 15:05:01,722 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2024-01-27 15:05:01,723 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 287 flow [2024-01-27 15:05:01,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 15:05:01,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:01,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:05:01,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1262244014, now seen corresponding path program 1 times [2024-01-27 15:05:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4939745] [2024-01-27 15:05:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:02,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4939745] [2024-01-27 15:05:02,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4939745] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88288987] [2024-01-27 15:05:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:02,007 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 15:05:02,033 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 15:05:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:02,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:05:02,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:02,141 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 8 treesize of output 1 [2024-01-27 15:05:02,194 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 25 treesize of output 1 [2024-01-27 15:05:02,257 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 80 treesize of output 32 [2024-01-27 15:05:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:02,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:02,506 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 9 treesize of output 1 [2024-01-27 15:05:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88288987] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:02,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:02,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-27 15:05:02,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51641788] [2024-01-27 15:05:02,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:05:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:02,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:05:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:05:02,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:02,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 15:05:02,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:02,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:02,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:03,347 INFO L124 PetriNetUnfolderBase]: 2279/4521 cut-off events. [2024-01-27 15:05:03,348 INFO L125 PetriNetUnfolderBase]: For 4352/4352 co-relation queries the response was YES. [2024-01-27 15:05:03,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 4521 events. 2279/4521 cut-off events. For 4352/4352 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 25461 event pairs, 317 based on Foata normal form. 16/4503 useless extension candidates. Maximal degree in co-relation 9683. Up to 674 conditions per place. [2024-01-27 15:05:03,366 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 201 selfloop transitions, 56 changer transitions 27/289 dead transitions. [2024-01-27 15:05:03,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 289 transitions, 1711 flow [2024-01-27 15:05:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:05:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:05:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-01-27 15:05:03,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729323308270676 [2024-01-27 15:05:03,369 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 287 flow. Second operand 19 states and 381 transitions. [2024-01-27 15:05:03,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 289 transitions, 1711 flow [2024-01-27 15:05:03,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 289 transitions, 1703 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:05:03,378 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 732 flow [2024-01-27 15:05:03,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=732, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-01-27 15:05:03,379 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2024-01-27 15:05:03,380 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 732 flow [2024-01-27 15:05:03,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 15:05:03,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:03,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:03,393 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 15:05:03,591 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 15:05:03,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:03,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2024-01-27 15:05:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055509739] [2024-01-27 15:05:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055509739] [2024-01-27 15:05:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055509739] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901851789] [2024-01-27 15:05:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:04,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:04,229 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 15:05:04,257 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 15:05:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:04,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:05:04,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:04,380 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 23 treesize of output 1 [2024-01-27 15:05:04,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 82 treesize of output 66 [2024-01-27 15:05:04,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-01-27 15:05:04,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 43 [2024-01-27 15:05:04,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:04,852 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2024-01-27 15:05:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:04,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:05,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:05,443 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 1 case distinctions, treesize of input 16 treesize of output 12 [2024-01-27 15:05:05,460 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-01-27 15:05:05,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2024-01-27 15:05:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:05,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901851789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:05,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:05,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 15:05:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059866364] [2024-01-27 15:05:05,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:05:05,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:05,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:05:05,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:05:05,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:05,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 732 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 15:05:05,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:05,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:05,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:08,028 INFO L124 PetriNetUnfolderBase]: 4663/9194 cut-off events. [2024-01-27 15:05:08,029 INFO L125 PetriNetUnfolderBase]: For 13879/13879 co-relation queries the response was YES. [2024-01-27 15:05:08,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23289 conditions, 9194 events. 4663/9194 cut-off events. For 13879/13879 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 59715 event pairs, 787 based on Foata normal form. 96/9288 useless extension candidates. Maximal degree in co-relation 22104. Up to 1400 conditions per place. [2024-01-27 15:05:08,070 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 260 selfloop transitions, 131 changer transitions 69/465 dead transitions. [2024-01-27 15:05:08,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 465 transitions, 3190 flow [2024-01-27 15:05:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:05:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:05:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 563 transitions. [2024-01-27 15:05:08,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361904761904762 [2024-01-27 15:05:08,073 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 732 flow. Second operand 30 states and 563 transitions. [2024-01-27 15:05:08,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 465 transitions, 3190 flow [2024-01-27 15:05:08,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 465 transitions, 2900 flow, removed 133 selfloop flow, removed 4 redundant places. [2024-01-27 15:05:08,103 INFO L231 Difference]: Finished difference. Result has 115 places, 177 transitions, 1587 flow [2024-01-27 15:05:08,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1587, PETRI_PLACES=115, PETRI_TRANSITIONS=177} [2024-01-27 15:05:08,104 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-01-27 15:05:08,105 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 177 transitions, 1587 flow [2024-01-27 15:05:08,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 15:05:08,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-01-27 15:05:08,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:05:08,316 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 15:05:08,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:08,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:08,317 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2024-01-27 15:05:08,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:08,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326924271] [2024-01-27 15:05:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:08,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326924271] [2024-01-27 15:05:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326924271] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914806016] [2024-01-27 15:05:08,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:05:08,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:08,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:08,542 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 15:05:08,543 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 15:05:08,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:05:08,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:05:08,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:05:08,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:08,673 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 8 treesize of output 1 [2024-01-27 15:05:08,700 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 8 treesize of output 1 [2024-01-27 15:05:08,739 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 8 treesize of output 1 [2024-01-27 15:05:08,775 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 8 treesize of output 1 [2024-01-27 15:05:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:08,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914806016] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:08,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:08,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 23 [2024-01-27 15:05:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524173363] [2024-01-27 15:05:08,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:05:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:05:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:05:08,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:08,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 177 transitions, 1587 flow. Second operand has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 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 15:05:08,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:08,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:12,136 INFO L124 PetriNetUnfolderBase]: 10620/20739 cut-off events. [2024-01-27 15:05:12,136 INFO L125 PetriNetUnfolderBase]: For 35081/35081 co-relation queries the response was YES. [2024-01-27 15:05:12,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54505 conditions, 20739 events. 10620/20739 cut-off events. For 35081/35081 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 153924 event pairs, 1938 based on Foata normal form. 322/21059 useless extension candidates. Maximal degree in co-relation 52520. Up to 3165 conditions per place. [2024-01-27 15:05:12,246 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 576 selfloop transitions, 353 changer transitions 30/964 dead transitions. [2024-01-27 15:05:12,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 964 transitions, 7387 flow [2024-01-27 15:05:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-27 15:05:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-27 15:05:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1111 transitions. [2024-01-27 15:05:12,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290476190476191 [2024-01-27 15:05:12,250 INFO L175 Difference]: Start difference. First operand has 115 places, 177 transitions, 1587 flow. Second operand 60 states and 1111 transitions. [2024-01-27 15:05:12,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 964 transitions, 7387 flow [2024-01-27 15:05:12,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 964 transitions, 7139 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-01-27 15:05:12,643 INFO L231 Difference]: Finished difference. Result has 186 places, 414 transitions, 4346 flow [2024-01-27 15:05:12,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4346, PETRI_PLACES=186, PETRI_TRANSITIONS=414} [2024-01-27 15:05:12,658 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 153 predicate places. [2024-01-27 15:05:12,658 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 414 transitions, 4346 flow [2024-01-27 15:05:12,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 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 15:05:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:12,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:05:12,871 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 15:05:12,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:12,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2024-01-27 15:05:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:12,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043367780] [2024-01-27 15:05:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043367780] [2024-01-27 15:05:15,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043367780] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:15,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216048884] [2024-01-27 15:05:15,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:05:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:15,201 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 15:05:15,225 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 15:05:15,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:05:15,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:05:15,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:05:15,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:15,355 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 15:05:15,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 50 [2024-01-27 15:05:15,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-01-27 15:05:15,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2024-01-27 15:05:15,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 123 treesize of output 95 [2024-01-27 15:05:15,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:15,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-01-27 15:05:15,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2024-01-27 15:05:16,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:16,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 227 treesize of output 107 [2024-01-27 15:05:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:16,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216048884] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:17,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:17,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2024-01-27 15:05:17,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566394714] [2024-01-27 15:05:17,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:17,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:05:17,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:05:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:05:17,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:17,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 414 transitions, 4346 flow. Second operand has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 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 15:05:17,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:17,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:17,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:31,253 INFO L124 PetriNetUnfolderBase]: 27955/54189 cut-off events. [2024-01-27 15:05:31,254 INFO L125 PetriNetUnfolderBase]: For 168915/168915 co-relation queries the response was YES. [2024-01-27 15:05:31,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155750 conditions, 54189 events. 27955/54189 cut-off events. For 168915/168915 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 443315 event pairs, 3973 based on Foata normal form. 720/54827 useless extension candidates. Maximal degree in co-relation 153561. Up to 8424 conditions per place. [2024-01-27 15:05:31,917 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 567 selfloop transitions, 885 changer transitions 72/1529 dead transitions. [2024-01-27 15:05:31,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1529 transitions, 16572 flow [2024-01-27 15:05:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-27 15:05:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-27 15:05:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 808 transitions. [2024-01-27 15:05:31,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513015873015873 [2024-01-27 15:05:31,930 INFO L175 Difference]: Start difference. First operand has 186 places, 414 transitions, 4346 flow. Second operand 45 states and 808 transitions. [2024-01-27 15:05:31,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1529 transitions, 16572 flow [2024-01-27 15:05:32,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 1529 transitions, 15590 flow, removed 458 selfloop flow, removed 1 redundant places. [2024-01-27 15:05:32,755 INFO L231 Difference]: Finished difference. Result has 250 places, 1049 transitions, 13193 flow [2024-01-27 15:05:32,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13193, PETRI_PLACES=250, PETRI_TRANSITIONS=1049} [2024-01-27 15:05:32,757 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 217 predicate places. [2024-01-27 15:05:32,757 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1049 transitions, 13193 flow [2024-01-27 15:05:32,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.125) internal successors, (267), 24 states have internal predecessors, (267), 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 15:05:32,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:32,758 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:32,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:05:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:32,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:32,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1539053168, now seen corresponding path program 1 times [2024-01-27 15:05:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271294990] [2024-01-27 15:05:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:05:33,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271294990] [2024-01-27 15:05:33,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271294990] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:33,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345880353] [2024-01-27 15:05:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:33,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:33,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:33,249 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 15:05:33,249 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 15:05:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:33,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:05:33,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:33,432 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 8 treesize of output 1 [2024-01-27 15:05:33,465 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 8 treesize of output 1 [2024-01-27 15:05:33,502 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 8 treesize of output 1 [2024-01-27 15:05:33,534 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 8 treesize of output 1 [2024-01-27 15:05:33,568 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 8 treesize of output 1 [2024-01-27 15:05:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:33,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:05:33,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345880353] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:33,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:33,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 5] total 18 [2024-01-27 15:05:33,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326150297] [2024-01-27 15:05:33,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:33,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:05:33,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:05:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:05:33,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:33,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1049 transitions, 13193 flow. Second operand has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 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 15:05:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:52,200 INFO L124 PetriNetUnfolderBase]: 39769/77422 cut-off events. [2024-01-27 15:05:52,200 INFO L125 PetriNetUnfolderBase]: For 460854/460854 co-relation queries the response was YES. [2024-01-27 15:05:52,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240258 conditions, 77422 events. 39769/77422 cut-off events. For 460854/460854 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 672565 event pairs, 5897 based on Foata normal form. 502/77868 useless extension candidates. Maximal degree in co-relation 238074. Up to 11946 conditions per place. [2024-01-27 15:05:53,131 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 723 selfloop transitions, 1320 changer transitions 45/2093 dead transitions. [2024-01-27 15:05:53,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 2093 transitions, 25351 flow [2024-01-27 15:05:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-01-27 15:05:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-01-27 15:05:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1040 transitions. [2024-01-27 15:05:53,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-01-27 15:05:53,138 INFO L175 Difference]: Start difference. First operand has 250 places, 1049 transitions, 13193 flow. Second operand 58 states and 1040 transitions. [2024-01-27 15:05:53,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 2093 transitions, 25351 flow [2024-01-27 15:05:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 2093 transitions, 24985 flow, removed 178 selfloop flow, removed 4 redundant places. [2024-01-27 15:05:56,668 INFO L231 Difference]: Finished difference. Result has 318 places, 1526 transitions, 22074 flow [2024-01-27 15:05:56,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=12880, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=22074, PETRI_PLACES=318, PETRI_TRANSITIONS=1526} [2024-01-27 15:05:56,669 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 285 predicate places. [2024-01-27 15:05:56,669 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1526 transitions, 22074 flow [2024-01-27 15:05:56,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 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 15:05:56,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:56,669 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:56,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:05:56,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:56,870 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 15:05:56,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1054889729, now seen corresponding path program 3 times [2024-01-27 15:05:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278791266] [2024-01-27 15:05:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:05,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:05,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278791266] [2024-01-27 15:06:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278791266] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:05,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018563711] [2024-01-27 15:06:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:06:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:05,159 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 15:06:05,159 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 15:06:05,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:06:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:05,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:06:05,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:05,413 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 23 treesize of output 1 [2024-01-27 15:06:05,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 80 treesize of output 64 [2024-01-27 15:06:05,490 INFO L349 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2024-01-27 15:06:05,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 80 [2024-01-27 15:06:05,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 58 treesize of output 20 [2024-01-27 15:06:05,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 159 treesize of output 131 [2024-01-27 15:06:05,738 INFO L349 Elim1Store]: treesize reduction 124, result has 14.5 percent of original size [2024-01-27 15:06:05,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 115 [2024-01-27 15:06:05,777 INFO L349 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2024-01-27 15:06:05,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 79 [2024-01-27 15:06:06,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 118 [2024-01-27 15:06:08,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:06:08,303 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 245 treesize of output 113 [2024-01-27 15:06:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:08,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018563711] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:09,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:09,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 36 [2024-01-27 15:06:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133732450] [2024-01-27 15:06:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:06:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:06:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:06:09,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:06:09,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1526 transitions, 22074 flow. Second operand has 36 states, 36 states have (on average 10.583333333333334) internal successors, (381), 36 states have internal predecessors, (381), 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 15:06:09,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:09,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:06:09,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:47,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []