./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-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_longer-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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:04:47,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:04:47,167 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:04:47,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:04:47,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:04:47,196 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:04:47,200 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:04:47,200 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:04:47,201 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:04:47,205 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:04:47,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:04:47,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:04:47,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:04:47,207 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:04:47,208 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:04:47,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:04:47,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:04:47,208 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:04:47,208 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:04:47,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:04:47,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:04:47,209 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:04:47,209 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:04:47,210 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:04:47,210 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:04:47,210 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:04:47,210 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:04:47,210 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:04:47,211 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:04:47,211 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:04:47,212 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:04:47,212 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:04:47,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:47,212 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:04:47,213 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:04:47,213 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:04:47,213 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:04:47,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:04:47,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2024-01-27 15:04:47,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:04:47,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:04:47,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:04:47,439 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:04:47,440 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:04:47,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-27 15:04:48,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:04:48,678 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:04:48,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-01-27 15:04:48,696 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555ec6ba6/5a539ca945864da8891dc54d027feba0/FLAG886e0a618 [2024-01-27 15:04:48,709 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555ec6ba6/5a539ca945864da8891dc54d027feba0 [2024-01-27 15:04:48,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:04:48,712 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:04:48,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:48,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:04:48,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:04:48,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:48" (1/1) ... [2024-01-27 15:04:48,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a150f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:48, skipping insertion in model container [2024-01-27 15:04:48,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:48" (1/1) ... [2024-01-27 15:04:48,758 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:04:49,105 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_longer-2.i[41529,41542] [2024-01-27 15:04:49,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:49,153 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:04:49,189 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_longer-2.i[41529,41542] [2024-01-27 15:04:49,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:49,257 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:04:49,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49 WrapperNode [2024-01-27 15:04:49,257 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:49,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:49,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:04:49,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:04:49,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,321 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-01-27 15:04:49,321 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:49,322 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:04:49,322 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:04:49,322 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:04:49,330 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,342 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,353 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 2, 5, 3]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 5, 0]. The 4 writes are split as follows [0, 1, 1, 0, 2]. [2024-01-27 15:04:49,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:04:49,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:04:49,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:04:49,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:04:49,388 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (1/1) ... [2024-01-27 15:04:49,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:49,414 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 15:04:49,438 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 15:04:49,452 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 15:04:49,453 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 15:04:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 15:04:49,453 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 15:04:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:04:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:04:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 15:04:49,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:04:49,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:04:49,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:04:49,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:04:49,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 15:04:49,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:04:49,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:04:49,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:04:49,459 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 15:04:49,572 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:04:49,574 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:04:49,780 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:04:49,781 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:04:50,024 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:04:50,027 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:04:50,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:50 BoogieIcfgContainer [2024-01-27 15:04:50,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:04:50,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:04:50,030 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:04:50,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:04:50,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:04:48" (1/3) ... [2024-01-27 15:04:50,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231763aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:50, skipping insertion in model container [2024-01-27 15:04:50,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49" (2/3) ... [2024-01-27 15:04:50,034 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231763aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:50, skipping insertion in model container [2024-01-27 15:04:50,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:50" (3/3) ... [2024-01-27 15:04:50,035 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-01-27 15:04:50,044 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:04:50,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:04:50,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-27 15:04:50,052 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:04:50,095 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:04:50,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-01-27 15:04:50,157 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-01-27 15:04:50,158 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:04:50,161 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 15:04:50,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-01-27 15:04:50,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-01-27 15:04:50,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:04:50,183 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;@7b3fda7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:04:50,184 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 15:04:50,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:04:50,192 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-01-27 15:04:50,193 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:04:50,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:50,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:50,194 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 15:04:50,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2024-01-27 15:04:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:50,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282788017] [2024-01-27 15:04:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:50,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:50,555 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 15:04:50,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282788017] [2024-01-27 15:04:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282788017] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:50,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:04:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793061327] [2024-01-27 15:04:50,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:50,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:04:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:04:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:04:50,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:04:50,602 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 15:04:50,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:50,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:04:50,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:50,802 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2024-01-27 15:04:50,803 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-01-27 15:04:50,807 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 15:04:50,813 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-01-27 15:04:50,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2024-01-27 15:04:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:04:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:04:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-01-27 15:04:50,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-01-27 15:04:50,826 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-01-27 15:04:50,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2024-01-27 15:04:50,860 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 15:04:50,862 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2024-01-27 15:04:50,863 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 15:04:50,869 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-01-27 15:04:50,870 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2024-01-27 15:04:50,870 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 15:04:50,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:50,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:04:50,871 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 15:04:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2024-01-27 15:04:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:50,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626149934] [2024-01-27 15:04:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:51,065 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 15:04:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:51,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626149934] [2024-01-27 15:04:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626149934] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329663554] [2024-01-27 15:04:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:51,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:51,069 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 15:04:51,098 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 15:04:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:51,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:04:51,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:51,290 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 15:04:51,391 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 15:04:51,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:51,473 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 15:04:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329663554] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:51,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:51,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-01-27 15:04:51,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847757527] [2024-01-27 15:04:51,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:51,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-27 15:04:51,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:51,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-27 15:04:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:04:51,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:04:51,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:51,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:51,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:04:51,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:51,998 INFO L124 PetriNetUnfolderBase]: 1316/2439 cut-off events. [2024-01-27 15:04:51,999 INFO L125 PetriNetUnfolderBase]: For 275/277 co-relation queries the response was YES. [2024-01-27 15:04:52,002 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 15:04:52,009 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 170 selfloop transitions, 30 changer transitions 6/211 dead transitions. [2024-01-27 15:04:52,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2024-01-27 15:04:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:04:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:04:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-01-27 15:04:52,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-01-27 15:04:52,013 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2024-01-27 15:04:52,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2024-01-27 15:04:52,014 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 15:04:52,016 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 353 flow [2024-01-27 15:04:52,016 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 15:04:52,017 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2024-01-27 15:04:52,017 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 353 flow [2024-01-27 15:04:52,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 11 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:52,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:52,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:52,032 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 15:04:52,229 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 15:04:52,229 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 15:04:52,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2024-01-27 15:04:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:52,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572297597] [2024-01-27 15:04:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:52,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572297597] [2024-01-27 15:04:52,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572297597] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:52,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:52,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:04:52,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165642469] [2024-01-27 15:04:52,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:04:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:04:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:04:52,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:04:52,331 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 15:04:52,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:52,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:04:52,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:52,501 INFO L124 PetriNetUnfolderBase]: 743/1518 cut-off events. [2024-01-27 15:04:52,502 INFO L125 PetriNetUnfolderBase]: For 1696/1696 co-relation queries the response was YES. [2024-01-27 15:04:52,505 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 7555 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 15:04:52,509 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-01-27 15:04:52,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 60 transitions, 376 flow [2024-01-27 15:04:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:04:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:04:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-01-27 15:04:52,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:04:52,511 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 353 flow. Second operand 3 states and 60 transitions. [2024-01-27 15:04:52,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 60 transitions, 376 flow [2024-01-27 15:04:52,521 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 15:04:52,523 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 229 flow [2024-01-27 15:04:52,523 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 15:04:52,523 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-01-27 15:04:52,524 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 229 flow [2024-01-27 15:04:52,524 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 15:04:52,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:52,524 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 15:04:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:04:52,525 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 15:04:52,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2024-01-27 15:04:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984733855] [2024-01-27 15:04:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984733855] [2024-01-27 15:04:52,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984733855] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:52,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:52,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:04:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696017861] [2024-01-27 15:04:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:04:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:04:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:04:52,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-01-27 15:04:52,815 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 15:04:52,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:52,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-01-27 15:04:52,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:53,046 INFO L124 PetriNetUnfolderBase]: 919/1874 cut-off events. [2024-01-27 15:04:53,046 INFO L125 PetriNetUnfolderBase]: For 1034/1036 co-relation queries the response was YES. [2024-01-27 15:04:53,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 1874 events. 919/1874 cut-off events. For 1034/1036 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9960 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 15:04:53,055 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 58 selfloop transitions, 7 changer transitions 8/85 dead transitions. [2024-01-27 15:04:53,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 486 flow [2024-01-27 15:04:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:04:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:04:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-01-27 15:04:53,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:04:53,058 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 229 flow. Second operand 5 states and 100 transitions. [2024-01-27 15:04:53,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 486 flow [2024-01-27 15:04:53,061 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 15:04:53,063 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 287 flow [2024-01-27 15:04:53,063 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 15:04:53,064 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 28 predicate places. [2024-01-27 15:04:53,064 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 287 flow [2024-01-27 15:04:53,065 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 15:04:53,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:53,065 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 15:04:53,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:04:53,065 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 15:04:53,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:53,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1130226200, now seen corresponding path program 1 times [2024-01-27 15:04:53,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:53,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627112054] [2024-01-27 15:04:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:53,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:53,402 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 15:04:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:53,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627112054] [2024-01-27 15:04:53,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627112054] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:53,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587628649] [2024-01-27 15:04:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:53,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:53,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:53,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:53,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:04:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:53,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:04:53,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:53,578 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 15:04:53,631 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 15:04:53,711 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 15:04:53,764 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 15:04:53,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:53,995 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 15:04:54,024 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 15:04:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587628649] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:54,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-01-27 15:04:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638379447] [2024-01-27 15:04:54,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:04:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:04:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:04:54,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:04:54,028 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 15:04:54,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:54,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:04:54,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:54,877 INFO L124 PetriNetUnfolderBase]: 2279/4521 cut-off events. [2024-01-27 15:04:54,878 INFO L125 PetriNetUnfolderBase]: For 4352/4352 co-relation queries the response was YES. [2024-01-27 15:04:54,886 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 25500 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 15:04:54,900 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 201 selfloop transitions, 56 changer transitions 27/289 dead transitions. [2024-01-27 15:04:54,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 289 transitions, 1711 flow [2024-01-27 15:04:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:04:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:04:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-01-27 15:04:54,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729323308270676 [2024-01-27 15:04:54,902 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 287 flow. Second operand 19 states and 381 transitions. [2024-01-27 15:04:54,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 289 transitions, 1711 flow [2024-01-27 15:04:54,908 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 15:04:54,911 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 732 flow [2024-01-27 15:04:54,911 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 15:04:54,913 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2024-01-27 15:04:54,913 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 732 flow [2024-01-27 15:04:54,913 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 15:04:54,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:54,914 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 15:04:54,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:55,124 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 15:04:55,124 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 15:04:55,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2024-01-27 15:04:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:55,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928915126] [2024-01-27 15:04:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:55,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:55,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928915126] [2024-01-27 15:04:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928915126] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873979689] [2024-01-27 15:04:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:55,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:04:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:55,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-27 15:04:55,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:55,707 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 15:04:55,782 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 50 treesize of output 19 [2024-01-27 15:04:55,927 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 56 treesize of output 32 [2024-01-27 15:04:55,952 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 15:04:55,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:56,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:04:56,344 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 18 treesize of output 14 [2024-01-27 15:04:56,372 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-01-27 15:04:56,372 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 78 treesize of output 65 [2024-01-27 15:04:56,420 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 15:04:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873979689] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:56,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:56,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-01-27 15:04:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430395304] [2024-01-27 15:04:56,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:56,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:04:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:04:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:04:56,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:04:56,425 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 15:04:56,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:56,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:04:56,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:57,866 INFO L124 PetriNetUnfolderBase]: 4138/8175 cut-off events. [2024-01-27 15:04:57,867 INFO L125 PetriNetUnfolderBase]: For 12625/12625 co-relation queries the response was YES. [2024-01-27 15:04:57,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20805 conditions, 8175 events. 4138/8175 cut-off events. For 12625/12625 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 51510 event pairs, 669 based on Foata normal form. 88/8261 useless extension candidates. Maximal degree in co-relation 19620. Up to 1241 conditions per place. [2024-01-27 15:04:57,916 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 204 selfloop transitions, 114 changer transitions 42/365 dead transitions. [2024-01-27 15:04:57,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 365 transitions, 2620 flow [2024-01-27 15:04:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:04:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:04:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 404 transitions. [2024-01-27 15:04:57,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496598639455782 [2024-01-27 15:04:57,918 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 732 flow. Second operand 21 states and 404 transitions. [2024-01-27 15:04:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 365 transitions, 2620 flow [2024-01-27 15:04:57,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 365 transitions, 2367 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-01-27 15:04:57,942 INFO L231 Difference]: Finished difference. Result has 105 places, 160 transitions, 1440 flow [2024-01-27 15:04:57,942 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=21, PETRI_FLOW=1440, PETRI_PLACES=105, PETRI_TRANSITIONS=160} [2024-01-27 15:04:57,944 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 72 predicate places. [2024-01-27 15:04:57,944 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 160 transitions, 1440 flow [2024-01-27 15:04:57,945 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 15:04:57,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:57,945 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-01-27 15:04:57,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:04:58,156 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 15:04:58,156 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 15:04:58,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:58,157 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2024-01-27 15:04:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:58,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991448727] [2024-01-27 15:04:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:58,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:58,434 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 15:04:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:58,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991448727] [2024-01-27 15:04:58,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991448727] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:58,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413750582] [2024-01-27 15:04:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:04:58,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:58,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:04:58,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:04:58,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:04:58,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:58,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:04:58,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:58,579 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 15:04:58,610 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 15:04:58,646 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 15:04:58,685 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 15:04:58,737 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 15:04:58,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:58,827 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 15:04:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413750582] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:58,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:58,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-01-27 15:04:58,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929364799] [2024-01-27 15:04:58,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:58,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:04:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:04:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:04:58,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:04:58,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 160 transitions, 1440 flow. Second operand has 23 states, 23 states have (on average 10.391304347826088) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:58,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:58,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:04:58,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:02,222 INFO L124 PetriNetUnfolderBase]: 10095/19686 cut-off events. [2024-01-27 15:05:02,222 INFO L125 PetriNetUnfolderBase]: For 32968/32968 co-relation queries the response was YES. [2024-01-27 15:05:02,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51894 conditions, 19686 events. 10095/19686 cut-off events. For 32968/32968 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 143880 event pairs, 1754 based on Foata normal form. 322/20006 useless extension candidates. Maximal degree in co-relation 49902. Up to 3006 conditions per place. [2024-01-27 15:05:02,329 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 574 selfloop transitions, 338 changer transitions 30/947 dead transitions. [2024-01-27 15:05:02,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 947 transitions, 7178 flow [2024-01-27 15:05:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-27 15:05:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-27 15:05:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1111 transitions. [2024-01-27 15:05:02,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290476190476191 [2024-01-27 15:05:02,335 INFO L175 Difference]: Start difference. First operand has 105 places, 160 transitions, 1440 flow. Second operand 60 states and 1111 transitions. [2024-01-27 15:05:02,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 947 transitions, 7178 flow [2024-01-27 15:05:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 947 transitions, 6936 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-01-27 15:05:02,677 INFO L231 Difference]: Finished difference. Result has 178 places, 397 transitions, 4195 flow [2024-01-27 15:05:02,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=4195, PETRI_PLACES=178, PETRI_TRANSITIONS=397} [2024-01-27 15:05:02,678 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 145 predicate places. [2024-01-27 15:05:02,678 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 397 transitions, 4195 flow [2024-01-27 15:05:02,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.391304347826088) internal successors, (239), 23 states have internal predecessors, (239), 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 15:05:02,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:02,679 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 15:05:02,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:05:02,891 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 15:05:02,892 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 15:05:02,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2024-01-27 15:05:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142732334] [2024-01-27 15:05:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142732334] [2024-01-27 15:05:03,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142732334] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782785043] [2024-01-27 15:05:03,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:05:03,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:03,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:03,749 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 15:05:03,750 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 15:05:03,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:05:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:05:03,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:05:03,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:03,915 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 15:05:03,960 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 34 treesize of output 14 [2024-01-27 15:05:04,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2024-01-27 15:05:04,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:04,225 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 74 treesize of output 38 [2024-01-27 15:05:04,250 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 15:05:04,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:05,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:05,013 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 18 treesize of output 14 [2024-01-27 15:05:05,034 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-01-27 15:05:05,034 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 108 treesize of output 89 [2024-01-27 15:05:05,094 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 15:05:05,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782785043] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:05,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-01-27 15:05:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13802087] [2024-01-27 15:05:05,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:05,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:05:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:05:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:05:05,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:05,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 397 transitions, 4195 flow. Second operand has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 states have internal predecessors, (239), 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 15:05:05,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:05,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:05,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:10,916 INFO L124 PetriNetUnfolderBase]: 18135/35204 cut-off events. [2024-01-27 15:05:10,916 INFO L125 PetriNetUnfolderBase]: For 96951/96951 co-relation queries the response was YES. [2024-01-27 15:05:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100124 conditions, 35204 events. 18135/35204 cut-off events. For 96951/96951 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 283825 event pairs, 3967 based on Foata normal form. 544/35698 useless extension candidates. Maximal degree in co-relation 97920. Up to 5472 conditions per place. [2024-01-27 15:05:11,212 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 451 selfloop transitions, 467 changer transitions 42/965 dead transitions. [2024-01-27 15:05:11,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 965 transitions, 10647 flow [2024-01-27 15:05:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:05:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:05:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 439 transitions. [2024-01-27 15:05:11,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453416149068323 [2024-01-27 15:05:11,214 INFO L175 Difference]: Start difference. First operand has 178 places, 397 transitions, 4195 flow. Second operand 23 states and 439 transitions. [2024-01-27 15:05:11,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 965 transitions, 10647 flow [2024-01-27 15:05:11,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 965 transitions, 9855 flow, removed 373 selfloop flow, removed 1 redundant places. [2024-01-27 15:05:11,631 INFO L231 Difference]: Finished difference. Result has 219 places, 639 transitions, 8218 flow [2024-01-27 15:05:11,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8218, PETRI_PLACES=219, PETRI_TRANSITIONS=639} [2024-01-27 15:05:11,634 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 186 predicate places. [2024-01-27 15:05:11,634 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 639 transitions, 8218 flow [2024-01-27 15:05:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 states have internal predecessors, (239), 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 15:05:11,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:11,635 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 15:05:11,653 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 15:05:11,847 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 15:05:11,848 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 15:05:11,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 250956852, now seen corresponding path program 1 times [2024-01-27 15:05:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:11,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866909888] [2024-01-27 15:05:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:12,264 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 15:05:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866909888] [2024-01-27 15:05:12,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866909888] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:12,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197715399] [2024-01-27 15:05:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:12,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:12,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:12,266 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 15:05:12,284 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 15:05:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:12,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:05:12,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:12,432 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 15:05:12,460 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 15:05:12,492 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 15:05:12,519 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 15:05:12,552 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 15:05:12,663 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 15:05:12,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:12,697 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 15:05:12,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197715399] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:12,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:12,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 19 [2024-01-27 15:05:12,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691318872] [2024-01-27 15:05:12,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:12,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:05:12,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:05:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:05:12,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:12,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 639 transitions, 8218 flow. Second operand has 19 states, 19 states have (on average 12.052631578947368) internal successors, (229), 19 states have internal predecessors, (229), 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 15:05:12,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:12,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:12,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:25,238 INFO L124 PetriNetUnfolderBase]: 30132/58840 cut-off events. [2024-01-27 15:05:25,238 INFO L125 PetriNetUnfolderBase]: For 269387/269387 co-relation queries the response was YES. [2024-01-27 15:05:25,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176874 conditions, 58840 events. 30132/58840 cut-off events. For 269387/269387 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 515861 event pairs, 4251 based on Foata normal form. 184/58986 useless extension candidates. Maximal degree in co-relation 174697. Up to 9033 conditions per place. [2024-01-27 15:05:25,979 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 652 selfloop transitions, 920 changer transitions 45/1622 dead transitions. [2024-01-27 15:05:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1622 transitions, 18767 flow [2024-01-27 15:05:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-01-27 15:05:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-01-27 15:05:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1043 transitions. [2024-01-27 15:05:25,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2024-01-27 15:05:25,985 INFO L175 Difference]: Start difference. First operand has 219 places, 639 transitions, 8218 flow. Second operand 58 states and 1043 transitions. [2024-01-27 15:05:25,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1622 transitions, 18767 flow [2024-01-27 15:05:28,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1622 transitions, 18593 flow, removed 87 selfloop flow, removed 0 redundant places. [2024-01-27 15:05:28,089 INFO L231 Difference]: Finished difference. Result has 294 places, 1070 transitions, 15987 flow [2024-01-27 15:05:28,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8155, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15987, PETRI_PLACES=294, PETRI_TRANSITIONS=1070} [2024-01-27 15:05:28,091 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 261 predicate places. [2024-01-27 15:05:28,091 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1070 transitions, 15987 flow [2024-01-27 15:05:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.052631578947368) internal successors, (229), 19 states have internal predecessors, (229), 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 15:05:28,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:28,091 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 15:05:28,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:05:28,307 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 15:05:28,308 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 15:05:28,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:28,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1054889729, now seen corresponding path program 3 times [2024-01-27 15:05:28,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:28,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383646954] [2024-01-27 15:05:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:28,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:29,678 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 15:05:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383646954] [2024-01-27 15:05:29,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383646954] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:29,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897041463] [2024-01-27 15:05:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:05:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:29,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:05:29,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:05:29,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:05:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:05:29,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:05:29,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:29,965 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 15:05:30,041 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2024-01-27 15:05:30,041 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 1 case distinctions, treesize of input 48 treesize of output 19 [2024-01-27 15:05:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-27 15:05:30,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2024-01-27 15:05:30,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:30,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 74 treesize of output 37 [2024-01-27 15:05:30,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:05:30,918 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 74 treesize of output 38 [2024-01-27 15:05:30,951 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 15:05:30,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:31,566 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 15:05:31,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897041463] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:31,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2024-01-27 15:05:31,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196490139] [2024-01-27 15:05:31,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:31,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:05:31,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:05:31,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:05:31,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:05:31,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1070 transitions, 15987 flow. Second operand has 30 states, 30 states have (on average 11.3) internal successors, (339), 30 states have internal predecessors, (339), 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 15:05:31,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:31,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:05:31,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand