./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-6.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/fib_safe-6.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 ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:04:47,140 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:04:47,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:04:47,194 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:04:47,195 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:04:47,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:04:47,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:04:47,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:04:47,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:04:47,217 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:04:47,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:04:47,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:04:47,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:04:47,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:04:47,219 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:04:47,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:04:47,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:04:47,220 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:04:47,220 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:04:47,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:04:47,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:04:47,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:04:47,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:04:47,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:04:47,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:04:47,224 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:04:47,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:04:47,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:47,224 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:04:47,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:04:47,226 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:04:47,226 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:04:47,226 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:04:47,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2024-01-27 15:04:47,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:04:47,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:04:47,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:04:47,462 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:04:47,463 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:04:47,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-6.i [2024-01-27 15:04:48,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:04:48,742 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:04:48,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-6.i [2024-01-27 15:04:48,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a524750e2/0ecac407cf7c498aaa1b27c70f74da03/FLAG14a203769 [2024-01-27 15:04:48,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a524750e2/0ecac407cf7c498aaa1b27c70f74da03 [2024-01-27 15:04:48,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:04:48,775 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:04:48,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:48,780 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:04:48,784 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:04:48,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:48" (1/1) ... [2024-01-27 15:04:48,785 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f7f04 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 15:04:48,785 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:04:48" (1/1) ... [2024-01-27 15:04:48,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:04:49,194 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/fib_safe-6.i[30241,30254] [2024-01-27 15:04:49,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:49,233 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:04:49,296 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/fib_safe-6.i[30241,30254] [2024-01-27 15:04:49,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:04:49,351 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:04:49,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:04:49 WrapperNode [2024-01-27 15:04:49,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:04:49,365 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:49,365 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:04:49,365 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:04:49,370 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 15:04:49,387 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 15:04:49,423 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-01-27 15:04:49,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:04:49,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:04:49,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:04:49,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:04:49,436 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 15:04:49,448 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 15:04:49,451 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 15:04:49,463 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:04:49,488 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 15:04:49,488 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 15:04:49,492 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 15:04:49,496 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 15:04:49,503 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 15:04:49,510 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 15:04:49,511 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:04:49,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:04:49,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:04:49,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:04:49,513 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 15:04:49,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:04:49,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:49,556 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 15:04:49,561 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 15:04:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 15:04:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 15:04:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 15:04:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 15:04:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:04:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:04:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:04:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:04:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:04:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:04:49,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:04:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:04:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:04:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:04:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:04:49,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:04:49,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:04:49,615 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 15:04:49,746 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:04:49,750 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:04:49,893 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:04:49,893 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:04:49,969 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:04:49,969 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:04:49,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:49 BoogieIcfgContainer [2024-01-27 15:04:49,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:04:49,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:04:49,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:04:49,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:04:49,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:04:48" (1/3) ... [2024-01-27 15:04:49,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b84a355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:49, skipping insertion in model container [2024-01-27 15:04:49,974 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 15:04:49,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b84a355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:04:49, skipping insertion in model container [2024-01-27 15:04:49,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:04:49" (3/3) ... [2024-01-27 15:04:49,976 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2024-01-27 15:04:49,982 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:04:49,990 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:04:49,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:04:49,990 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:04:50,014 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:04:50,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-01-27 15:04:50,069 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-01-27 15:04:50,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:04:50,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-27 15:04:50,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-01-27 15:04:50,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-01-27 15:04:50,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:04:50,099 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;@6ecb704, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:04:50,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:04:50,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:04:50,105 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-01-27 15:04:50,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:04:50,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:50,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:50,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:50,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2024-01-27 15:04:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:50,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811075945] [2024-01-27 15:04:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:50,440 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 15:04:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:50,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811075945] [2024-01-27 15:04:50,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811075945] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:04:50,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:04:50,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:04:50,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116161527] [2024-01-27 15:04:50,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:04:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:04:50,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:04:50,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:04:50,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 15:04:50,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 15:04:50,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:50,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 15:04:50,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:50,673 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-01-27 15:04:50,674 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:04:50,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-01-27 15:04:50,677 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-01-27 15:04:50,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-01-27 15:04:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:04:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:04:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-27 15:04:50,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-01-27 15:04:50,688 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2024-01-27 15:04:50,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2024-01-27 15:04:50,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:04:50,692 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2024-01-27 15:04:50,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-01-27 15:04:50,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-01-27 15:04:50,696 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2024-01-27 15:04:50,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 15:04:50,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:50,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:04:50,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:50,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2024-01-27 15:04:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:50,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387441588] [2024-01-27 15:04:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:50,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:50,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387441588] [2024-01-27 15:04:50,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387441588] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:50,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265926499] [2024-01-27 15:04:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:50,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:50,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:50,781 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 15:04:50,805 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 15:04:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:50,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:04:50,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:50,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265926499] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:50,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-01-27 15:04:50,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524824770] [2024-01-27 15:04:50,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:50,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:04:50,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:04:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:04:50,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 15:04:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 15:04:50,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:50,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 15:04:50,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:51,014 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-01-27 15:04:51,026 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:04:51,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 802 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-01-27 15:04:51,030 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-27 15:04:51,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2024-01-27 15:04:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:04:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:04:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-01-27 15:04:51,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-01-27 15:04:51,032 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2024-01-27 15:04:51,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2024-01-27 15:04:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:04:51,034 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2024-01-27 15:04:51,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-01-27 15:04:51,042 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-01-27 15:04:51,042 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2024-01-27 15:04:51,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 15:04:51,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:51,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:51,055 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 15:04:51,254 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 15:04:51,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:51,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2024-01-27 15:04:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:51,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285010904] [2024-01-27 15:04:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:51,381 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 15:04:51,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:51,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285010904] [2024-01-27 15:04:51,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285010904] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:51,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871946399] [2024-01-27 15:04:51,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:04:51,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:51,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:51,400 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 15:04:51,407 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 15:04:51,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:04:51,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:51,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:04:51,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:51,488 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 15:04:51,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:51,531 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 15:04:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871946399] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:51,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:51,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:04:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793208662] [2024-01-27 15:04:51,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:04:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:04:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:04:51,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 15:04:51,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 15:04:51,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:51,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 15:04:51,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:51,687 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-01-27 15:04:51,688 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-27 15:04:51,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1197 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2024-01-27 15:04:51,692 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-01-27 15:04:51,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2024-01-27 15:04:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:04:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:04:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-01-27 15:04:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-01-27 15:04:51,694 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2024-01-27 15:04:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2024-01-27 15:04:51,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:04:51,697 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2024-01-27 15:04:51,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-01-27 15:04:51,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-01-27 15:04:51,698 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2024-01-27 15:04:51,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 15:04:51,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:51,699 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:51,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-27 15:04:51,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-01-27 15:04:51,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:51,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2024-01-27 15:04:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:51,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745785330] [2024-01-27 15:04:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:52,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745785330] [2024-01-27 15:04:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745785330] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727811555] [2024-01-27 15:04:52,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:04:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:52,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:52,145 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 15:04:52,147 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 15:04:52,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-01-27 15:04:52,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:52,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:04:52,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:52,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727811555] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:52,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:52,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-01-27 15:04:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971830862] [2024-01-27 15:04:52,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:04:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:04:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:04:52,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-01-27 15:04:52,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 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 15:04:52,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:52,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-01-27 15:04:52,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:04:52,546 INFO L124 PetriNetUnfolderBase]: 331/547 cut-off events. [2024-01-27 15:04:52,547 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2024-01-27 15:04:52,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 547 events. 331/547 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1464 event pairs, 20 based on Foata normal form. 36/569 useless extension candidates. Maximal degree in co-relation 1568. Up to 118 conditions per place. [2024-01-27 15:04:52,550 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 98 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-01-27 15:04:52,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 123 transitions, 596 flow [2024-01-27 15:04:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:04:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:04:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 309 transitions. [2024-01-27 15:04:52,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665948275862069 [2024-01-27 15:04:52,552 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 16 states and 309 transitions. [2024-01-27 15:04:52,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 123 transitions, 596 flow [2024-01-27 15:04:52,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 123 transitions, 540 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-27 15:04:52,557 INFO L231 Difference]: Finished difference. Result has 67 places, 39 transitions, 194 flow [2024-01-27 15:04:52,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=194, PETRI_PLACES=67, PETRI_TRANSITIONS=39} [2024-01-27 15:04:52,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-01-27 15:04:52,558 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 39 transitions, 194 flow [2024-01-27 15:04:52,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 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 15:04:52,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:04:52,559 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:04:52,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:04:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:52,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:04:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:04:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -853980307, now seen corresponding path program 4 times [2024-01-27 15:04:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:04:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086781123] [2024-01-27 15:04:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:04:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:04:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:04:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:53,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:04:53,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086781123] [2024-01-27 15:04:53,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086781123] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:04:53,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650916471] [2024-01-27 15:04:53,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:04:53,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:04:53,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:04:53,492 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 15:04:53,519 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 15:04:53,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:04:53,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:04:53,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-27 15:04:53,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:04:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:54,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:04:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:04:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650916471] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:04:55,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:04:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-01-27 15:04:55,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629797119] [2024-01-27 15:04:55,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:04:55,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-01-27 15:04:55,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:04:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-01-27 15:04:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=3139, Unknown=0, NotChecked=0, Total=3660 [2024-01-27 15:04:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:04:55,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 39 transitions, 194 flow. Second operand has 61 states, 61 states have (on average 6.278688524590164) internal successors, (383), 61 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:04:55,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:04:55,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:04:55,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:05:09,955 INFO L124 PetriNetUnfolderBase]: 15682/25475 cut-off events. [2024-01-27 15:05:09,956 INFO L125 PetriNetUnfolderBase]: For 47919/47919 co-relation queries the response was YES. [2024-01-27 15:05:10,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67838 conditions, 25475 events. 15682/25475 cut-off events. For 47919/47919 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 163062 event pairs, 70 based on Foata normal form. 0/25147 useless extension candidates. Maximal degree in co-relation 67806. Up to 3279 conditions per place. [2024-01-27 15:05:10,100 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 580 selfloop transitions, 585 changer transitions 701/1869 dead transitions. [2024-01-27 15:05:10,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 1869 transitions, 11071 flow [2024-01-27 15:05:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2024-01-27 15:05:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2024-01-27 15:05:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 2360 transitions. [2024-01-27 15:05:10,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2024-01-27 15:05:10,110 INFO L175 Difference]: Start difference. First operand has 67 places, 39 transitions, 194 flow. Second operand 177 states and 2360 transitions. [2024-01-27 15:05:10,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 1869 transitions, 11071 flow [2024-01-27 15:05:10,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1869 transitions, 9529 flow, removed 442 selfloop flow, removed 11 redundant places. [2024-01-27 15:05:10,277 INFO L231 Difference]: Finished difference. Result has 302 places, 678 transitions, 4092 flow [2024-01-27 15:05:10,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=4092, PETRI_PLACES=302, PETRI_TRANSITIONS=678} [2024-01-27 15:05:10,279 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-01-27 15:05:10,279 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 678 transitions, 4092 flow [2024-01-27 15:05:10,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.278688524590164) internal successors, (383), 61 states have internal predecessors, (383), 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 15:05:10,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:05:10,280 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:05:10,307 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 15:05:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:10,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:05:10,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:05:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 895493725, now seen corresponding path program 1 times [2024-01-27 15:05:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:05:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844301374] [2024-01-27 15:05:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:05:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:11,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:05:11,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844301374] [2024-01-27 15:05:11,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844301374] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:05:11,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10004629] [2024-01-27 15:05:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:05:11,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:05:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:05:11,340 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 15:05:11,341 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 15:05:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:05:11,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-27 15:05:11,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:05:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:12,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:05:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:05:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10004629] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:05:13,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:05:13,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2024-01-27 15:05:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086717993] [2024-01-27 15:05:13,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:05:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-01-27 15:05:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:05:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-01-27 15:05:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3995, Unknown=0, NotChecked=0, Total=4556 [2024-01-27 15:05:13,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-01-27 15:05:13,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 678 transitions, 4092 flow. Second operand has 68 states, 68 states have (on average 6.323529411764706) internal successors, (430), 68 states have internal predecessors, (430), 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 15:05:13,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:05:13,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-01-27 15:05:13,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand