./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:03:59,220 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:03:59,308 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:03:59,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:03:59,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:03:59,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:03:59,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:03:59,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:03:59,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:03:59,350 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:03:59,350 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:03:59,350 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:03:59,351 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:03:59,352 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:03:59,352 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:03:59,353 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:03:59,353 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:03:59,353 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:03:59,353 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:03:59,354 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:03:59,354 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:03:59,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:03:59,355 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:03:59,355 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:03:59,355 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:03:59,356 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:03:59,356 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:03:59,356 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:03:59,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:03:59,357 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:03:59,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:03:59,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:03:59,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:03:59,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:03:59,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:03:59,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:03:59,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:03:59,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:03:59,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:03:59,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:03:59,361 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:03:59,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:03:59,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:03:59,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 [2024-06-27 17:03:59,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:03:59,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:03:59,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:03:59,664 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:03:59,664 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:03:59,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2024-06-27 17:04:00,854 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:04:01,056 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:04:01,057 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2024-06-27 17:04:01,064 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca2d911b/463d0f55e77d47acabbb8a5130c0bedc/FLAG3b64dfde4 [2024-06-27 17:04:01,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca2d911b/463d0f55e77d47acabbb8a5130c0bedc [2024-06-27 17:04:01,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:04:01,077 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:04:01,078 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:04:01,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:04:01,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:04:01,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cbadd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01, skipping insertion in model container [2024-06-27 17:04:01,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,115 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:04:01,270 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4059,4072] [2024-06-27 17:04:01,279 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:04:01,289 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:04:01,313 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c[4059,4072] [2024-06-27 17:04:01,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:04:01,342 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:04:01,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01 WrapperNode [2024-06-27 17:04:01,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:04:01,346 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:04:01,346 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:04:01,346 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:04:01,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,402 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 256 [2024-06-27 17:04:01,403 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:04:01,404 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:04:01,404 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:04:01,404 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:04:01,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,428 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,445 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-27 17:04:01,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:04:01,489 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:04:01,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:04:01,490 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:04:01,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (1/1) ... [2024-06-27 17:04:01,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:04:01,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:01,526 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) [2024-06-27 17:04:01,551 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 [2024-06-27 17:04:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:04:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:04:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:04:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:04:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:04:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 17:04:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 17:04:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-27 17:04:01,582 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-27 17:04:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:04:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:04:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:04:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:04:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:04:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:04:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:04:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:04:01,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:04:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:04:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:04:01,585 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:04:01,684 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:04:01,688 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:04:02,076 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:04:02,076 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:04:02,319 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:04:02,320 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-06-27 17:04:02,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:04:02 BoogieIcfgContainer [2024-06-27 17:04:02,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:04:02,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:04:02,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:04:02,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:04:02,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:04:01" (1/3) ... [2024-06-27 17:04:02,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba1d048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:04:02, skipping insertion in model container [2024-06-27 17:04:02,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:04:01" (2/3) ... [2024-06-27 17:04:02,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba1d048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:04:02, skipping insertion in model container [2024-06-27 17:04:02,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:04:02" (3/3) ... [2024-06-27 17:04:02,330 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2024-06-27 17:04:02,337 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:04:02,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:04:02,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:04:02,344 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:04:02,407 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 17:04:02,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 51 transitions, 130 flow [2024-06-27 17:04:02,477 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2024-06-27 17:04:02,479 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:04:02,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 47 events. 6/47 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-06-27 17:04:02,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 51 transitions, 130 flow [2024-06-27 17:04:02,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 116 flow [2024-06-27 17:04:02,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:04:02,509 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;@731d91eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:04:02,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:04:02,535 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:04:02,536 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2024-06-27 17:04:02,536 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:04:02,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:02,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:02,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:02,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash -811056868, now seen corresponding path program 1 times [2024-06-27 17:04:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:02,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993199478] [2024-06-27 17:04:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:03,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:03,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993199478] [2024-06-27 17:04:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993199478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:04:03,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:04:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:04:03,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444313234] [2024-06-27 17:04:03,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:04:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:04:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:03,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:04:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:04:03,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-06-27 17:04:03,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-27 17:04:03,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:03,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-06-27 17:04:03,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:04,397 INFO L124 PetriNetUnfolderBase]: 5949/8781 cut-off events. [2024-06-27 17:04:04,397 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2024-06-27 17:04:04,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17271 conditions, 8781 events. 5949/8781 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 52905 event pairs, 814 based on Foata normal form. 311/9050 useless extension candidates. Maximal degree in co-relation 15984. Up to 2255 conditions per place. [2024-06-27 17:04:04,462 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 93 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-27 17:04:04,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 112 transitions, 474 flow [2024-06-27 17:04:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:04:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:04:04,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-27 17:04:04,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826330532212886 [2024-06-27 17:04:04,477 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 116 flow. Second operand 7 states and 208 transitions. [2024-06-27 17:04:04,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 112 transitions, 474 flow [2024-06-27 17:04:04,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 112 transitions, 442 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 17:04:04,489 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 153 flow [2024-06-27 17:04:04,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 17:04:04,494 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2024-06-27 17:04:04,494 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 153 flow [2024-06-27 17:04:04,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-06-27 17:04:04,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:04,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:04,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:04:04,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:04,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash 130956329, now seen corresponding path program 1 times [2024-06-27 17:04:04,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:04,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79747204] [2024-06-27 17:04:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:04,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:04,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79747204] [2024-06-27 17:04:04,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79747204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:04:04,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:04:04,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:04:04,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543452217] [2024-06-27 17:04:04,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:04:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:04:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:04:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:04:04,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 17:04:04,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:04:04,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:04,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 17:04:04,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:05,054 INFO L124 PetriNetUnfolderBase]: 2552/4215 cut-off events. [2024-06-27 17:04:05,055 INFO L125 PetriNetUnfolderBase]: For 736/860 co-relation queries the response was YES. [2024-06-27 17:04:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8398 conditions, 4215 events. 2552/4215 cut-off events. For 736/860 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25874 event pairs, 942 based on Foata normal form. 172/4279 useless extension candidates. Maximal degree in co-relation 5553. Up to 2308 conditions per place. [2024-06-27 17:04:05,087 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 45 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-06-27 17:04:05,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 261 flow [2024-06-27 17:04:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:04:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:04:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-27 17:04:05,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-06-27 17:04:05,094 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 153 flow. Second operand 3 states and 105 transitions. [2024-06-27 17:04:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 261 flow [2024-06-27 17:04:05,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 249 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:04:05,103 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 132 flow [2024-06-27 17:04:05,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-27 17:04:05,104 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-27 17:04:05,104 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 132 flow [2024-06-27 17:04:05,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:04:05,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:05,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:05,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:04:05,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:05,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1569650276, now seen corresponding path program 1 times [2024-06-27 17:04:05,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:05,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799051181] [2024-06-27 17:04:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:05,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:04:05,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799051181] [2024-06-27 17:04:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799051181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:04:05,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:04:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:04:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305128092] [2024-06-27 17:04:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:04:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:04:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:04:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:04:05,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 17:04:05,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:04:05,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:05,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 17:04:05,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:05,544 INFO L124 PetriNetUnfolderBase]: 2474/4069 cut-off events. [2024-06-27 17:04:05,545 INFO L125 PetriNetUnfolderBase]: For 921/1135 co-relation queries the response was YES. [2024-06-27 17:04:05,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8406 conditions, 4069 events. 2474/4069 cut-off events. For 921/1135 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 23198 event pairs, 983 based on Foata normal form. 246/4193 useless extension candidates. Maximal degree in co-relation 3676. Up to 2771 conditions per place. [2024-06-27 17:04:05,569 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 42 selfloop transitions, 2 changer transitions 3/64 dead transitions. [2024-06-27 17:04:05,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 260 flow [2024-06-27 17:04:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:04:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:04:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-27 17:04:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6797385620915033 [2024-06-27 17:04:05,571 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 132 flow. Second operand 3 states and 104 transitions. [2024-06-27 17:04:05,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 260 flow [2024-06-27 17:04:05,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:04:05,574 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 142 flow [2024-06-27 17:04:05,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 17:04:05,575 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-27 17:04:05,575 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 142 flow [2024-06-27 17:04:05,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:04:05,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:05,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:05,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:04:05,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:05,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash -436628107, now seen corresponding path program 1 times [2024-06-27 17:04:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:05,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002009327] [2024-06-27 17:04:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:04:05,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:05,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002009327] [2024-06-27 17:04:05,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002009327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:04:05,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:04:05,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:04:05,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784509789] [2024-06-27 17:04:05,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:04:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:04:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:04:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:04:05,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 17:04:05,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-06-27 17:04:05,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:05,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 17:04:05,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:06,101 INFO L124 PetriNetUnfolderBase]: 2788/4716 cut-off events. [2024-06-27 17:04:06,102 INFO L125 PetriNetUnfolderBase]: For 1717/2048 co-relation queries the response was YES. [2024-06-27 17:04:06,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10154 conditions, 4716 events. 2788/4716 cut-off events. For 1717/2048 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 28293 event pairs, 2289 based on Foata normal form. 310/4821 useless extension candidates. Maximal degree in co-relation 7637. Up to 3279 conditions per place. [2024-06-27 17:04:06,194 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 32 selfloop transitions, 2 changer transitions 21/72 dead transitions. [2024-06-27 17:04:06,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 72 transitions, 301 flow [2024-06-27 17:04:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:04:06,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:04:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-27 17:04:06,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843137254901961 [2024-06-27 17:04:06,197 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 142 flow. Second operand 5 states and 149 transitions. [2024-06-27 17:04:06,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 72 transitions, 301 flow [2024-06-27 17:04:06,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:04:06,201 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 158 flow [2024-06-27 17:04:06,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2024-06-27 17:04:06,203 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-06-27 17:04:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 158 flow [2024-06-27 17:04:06,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2024-06-27 17:04:06,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:06,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:06,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:04:06,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:06,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash -921853039, now seen corresponding path program 1 times [2024-06-27 17:04:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898705698] [2024-06-27 17:04:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:06,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:04:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:06,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898705698] [2024-06-27 17:04:06,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898705698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:04:06,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:04:06,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:04:06,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219131682] [2024-06-27 17:04:06,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:04:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:04:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:04:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:04:06,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 51 [2024-06-27 17:04:06,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2024-06-27 17:04:06,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:06,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 51 [2024-06-27 17:04:06,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:06,884 INFO L124 PetriNetUnfolderBase]: 3439/5792 cut-off events. [2024-06-27 17:04:06,884 INFO L125 PetriNetUnfolderBase]: For 2336/2767 co-relation queries the response was YES. [2024-06-27 17:04:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12454 conditions, 5792 events. 3439/5792 cut-off events. For 2336/2767 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 36638 event pairs, 2854 based on Foata normal form. 453/5958 useless extension candidates. Maximal degree in co-relation 12435. Up to 3280 conditions per place. [2024-06-27 17:04:06,919 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 33 selfloop transitions, 2 changer transitions 21/73 dead transitions. [2024-06-27 17:04:06,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 331 flow [2024-06-27 17:04:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:04:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:04:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-27 17:04:06,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-06-27 17:04:06,921 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 158 flow. Second operand 4 states and 129 transitions. [2024-06-27 17:04:06,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 331 flow [2024-06-27 17:04:06,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 315 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 17:04:06,925 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 162 flow [2024-06-27 17:04:06,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-06-27 17:04:06,926 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-06-27 17:04:06,927 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 162 flow [2024-06-27 17:04:06,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2024-06-27 17:04:06,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:06,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:06,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:04:06,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:06,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1282735966, now seen corresponding path program 1 times [2024-06-27 17:04:06,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:06,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281748145] [2024-06-27 17:04:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:06,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:04:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281748145] [2024-06-27 17:04:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281748145] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002439927] [2024-06-27 17:04:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:07,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:07,048 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) [2024-06-27 17:04:07,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:04:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:07,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:04:07,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:04:07,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:04:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002439927] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:07,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-06-27 17:04:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815158066] [2024-06-27 17:04:07,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:07,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:04:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:04:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:04:07,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-27 17:04:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 19.333333333333332) internal successors, (174), 9 states have internal predecessors, (174), 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) [2024-06-27 17:04:07,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:07,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-27 17:04:07,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:04:12,994 INFO L124 PetriNetUnfolderBase]: 42534/60524 cut-off events. [2024-06-27 17:04:12,995 INFO L125 PetriNetUnfolderBase]: For 13969/14171 co-relation queries the response was YES. [2024-06-27 17:04:13,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134094 conditions, 60524 events. 42534/60524 cut-off events. For 13969/14171 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 385227 event pairs, 2061 based on Foata normal form. 3223/61154 useless extension candidates. Maximal degree in co-relation 134070. Up to 7114 conditions per place. [2024-06-27 17:04:13,272 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 281 selfloop transitions, 54 changer transitions 126/468 dead transitions. [2024-06-27 17:04:13,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 468 transitions, 2229 flow [2024-06-27 17:04:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:04:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:04:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 721 transitions. [2024-06-27 17:04:13,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523602033405955 [2024-06-27 17:04:13,275 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 162 flow. Second operand 27 states and 721 transitions. [2024-06-27 17:04:13,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 468 transitions, 2229 flow [2024-06-27 17:04:13,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 468 transitions, 2193 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 17:04:13,368 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 609 flow [2024-06-27 17:04:13,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=609, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-27 17:04:13,371 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 54 predicate places. [2024-06-27 17:04:13,371 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 609 flow [2024-06-27 17:04:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.333333333333332) internal successors, (174), 9 states have internal predecessors, (174), 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) [2024-06-27 17:04:13,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:04:13,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:04:13,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:04:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:04:13,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:04:13,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:04:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash 873954352, now seen corresponding path program 2 times [2024-06-27 17:04:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:04:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314374111] [2024-06-27 17:04:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:04:13,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:04:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:04:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:15,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:04:15,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314374111] [2024-06-27 17:04:15,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314374111] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:04:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437415001] [2024-06-27 17:04:15,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:04:15,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:04:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:04:15,155 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) [2024-06-27 17:04:15,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:04:15,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:04:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:04:15,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 55 conjunts are in the unsatisfiable core [2024-06-27 17:04:15,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:04:15,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-06-27 17:04:15,389 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 [2024-06-27 17:04:15,459 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-27 17:04:15,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-06-27 17:04:15,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2024-06-27 17:04:16,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-06-27 17:04:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:16,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:04:22,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:04:22,616 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 328 treesize of output 304 [2024-06-27 17:04:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:04:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437415001] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:04:23,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:04:23,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2024-06-27 17:04:23,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028880975] [2024-06-27 17:04:23,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:04:23,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-06-27 17:04:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:04:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-06-27 17:04:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1795, Unknown=1, NotChecked=0, Total=2070 [2024-06-27 17:04:27,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:27,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 51 [2024-06-27 17:04:27,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 609 flow. Second operand has 46 states, 46 states have (on average 8.630434782608695) internal successors, (397), 46 states have internal predecessors, (397), 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) [2024-06-27 17:04:27,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:04:27,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 51 [2024-06-27 17:04:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:14,146 INFO L124 PetriNetUnfolderBase]: 125199/170209 cut-off events. [2024-06-27 17:05:14,146 INFO L125 PetriNetUnfolderBase]: For 906266/906266 co-relation queries the response was YES. [2024-06-27 17:05:15,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583729 conditions, 170209 events. 125199/170209 cut-off events. For 906266/906266 co-relation queries the response was YES. Maximal size of possible extension queue 3592. Compared 1067211 event pairs, 8081 based on Foata normal form. 3570/169455 useless extension candidates. Maximal degree in co-relation 555612. Up to 19580 conditions per place. [2024-06-27 17:05:15,889 INFO L140 encePairwiseOnDemand]: 26/51 looper letters, 1675 selfloop transitions, 720 changer transitions 390/2787 dead transitions. [2024-06-27 17:05:15,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 2787 transitions, 18672 flow [2024-06-27 17:05:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-06-27 17:05:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2024-06-27 17:05:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 3679 transitions. [2024-06-27 17:05:15,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34027007029226786 [2024-06-27 17:05:15,910 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 609 flow. Second operand 212 states and 3679 transitions. [2024-06-27 17:05:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 2787 transitions, 18672 flow [2024-06-27 17:05:22,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 2787 transitions, 18420 flow, removed 126 selfloop flow, removed 3 redundant places. [2024-06-27 17:05:22,705 INFO L231 Difference]: Finished difference. Result has 381 places, 883 transitions, 6657 flow [2024-06-27 17:05:22,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=212, PETRI_FLOW=6657, PETRI_PLACES=381, PETRI_TRANSITIONS=883} [2024-06-27 17:05:22,707 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 328 predicate places. [2024-06-27 17:05:22,707 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 883 transitions, 6657 flow [2024-06-27 17:05:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 8.630434782608695) internal successors, (397), 46 states have internal predecessors, (397), 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) [2024-06-27 17:05:22,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:22,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:22,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:22,908 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,SelfDestructingSolverStorable6 [2024-06-27 17:05:22,909 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 17:05:22,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1456570720, now seen corresponding path program 3 times [2024-06-27 17:05:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314008512] [2024-06-27 17:05:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314008512] [2024-06-27 17:05:24,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314008512] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:24,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429798187] [2024-06-27 17:05:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:05:24,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:24,441 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) [2024-06-27 17:05:24,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:05:24,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:05:24,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:24,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 17:05:24,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:24,721 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 [2024-06-27 17:05:25,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:25,314 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 26 treesize of output 26 [2024-06-27 17:05:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:25,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:26,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:26,505 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 152 treesize of output 150 [2024-06-27 17:05:26,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:26,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 31 [2024-06-27 17:05:26,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:26,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2024-06-27 17:05:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:05:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429798187] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:26,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:26,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2024-06-27 17:05:26,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580687789] [2024-06-27 17:05:26,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:26,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 17:05:26,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:26,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 17:05:26,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1933, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 17:05:27,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-27 17:05:27,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 883 transitions, 6657 flow. Second operand has 47 states, 47 states have (on average 12.340425531914894) internal successors, (580), 47 states have internal predecessors, (580), 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) [2024-06-27 17:05:27,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:27,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-27 17:05:27,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand