./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.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-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:05:35,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:05:35,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:05:35,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:05:35,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:05:35,533 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:05:35,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:05:35,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:05:35,535 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:05:35,539 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:05:35,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:05:35,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:05:35,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:05:35,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:05:35,542 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:05:35,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:05:35,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:05:35,543 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:05:35,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:05:35,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:05:35,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:05:35,545 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:05:35,545 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:05:35,545 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:05:35,546 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:05:35,546 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:05:35,546 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:05:35,546 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:05:35,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:05:35,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:05:35,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:05:35,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:05:35,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:05:35,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:05:35,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:05:35,549 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:05:35,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:05:35,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:05:35,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:05:35,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:05:35,550 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:05:35,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:05:35,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:05:35,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-06-27 17:05:35,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:05:35,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:05:35,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:05:35,843 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:05:35,843 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:05:35,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2024-06-27 17:05:37,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:05:37,218 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:05:37,218 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2024-06-27 17:05:37,226 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c411a3021/bf19885cb1f5464eab846223b5afa90e/FLAG264ef3a17 [2024-06-27 17:05:37,238 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c411a3021/bf19885cb1f5464eab846223b5afa90e [2024-06-27 17:05:37,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:05:37,241 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:05:37,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:05:37,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:05:37,247 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:05:37,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b47e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37, skipping insertion in model container [2024-06-27 17:05:37,249 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,271 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:05:37,476 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-send-receive-alt.wvr.c[2676,2689] [2024-06-27 17:05:37,487 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:05:37,497 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:05:37,514 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-send-receive-alt.wvr.c[2676,2689] [2024-06-27 17:05:37,516 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:05:37,534 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:05:37,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37 WrapperNode [2024-06-27 17:05:37,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:05:37,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:05:37,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:05:37,536 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:05:37,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,571 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 139 [2024-06-27 17:05:37,571 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:05:37,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:05:37,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:05:37,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:05:37,582 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,584 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,600 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:05:37,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,601 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,623 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,626 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,627 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:05:37,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:05:37,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:05:37,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:05:37,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (1/1) ... [2024-06-27 17:05:37,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:05:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:37,673 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 17:05:37,696 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 17:05:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:05:37,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:05:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:05:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:05:37,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:05:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:05:37,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:05:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:05:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:05:37,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:05:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:05:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:05:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:05:37,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:05:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:05:37,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:05:37,731 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 17:05:37,824 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:05:37,826 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:05:38,032 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:05:38,033 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:05:38,267 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:05:38,270 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:05:38,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:05:38 BoogieIcfgContainer [2024-06-27 17:05:38,271 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:05:38,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:05:38,274 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:05:38,277 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:05:38,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:05:37" (1/3) ... [2024-06-27 17:05:38,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1119ec0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:05:38, skipping insertion in model container [2024-06-27 17:05:38,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:05:37" (2/3) ... [2024-06-27 17:05:38,280 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1119ec0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:05:38, skipping insertion in model container [2024-06-27 17:05:38,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:05:38" (3/3) ... [2024-06-27 17:05:38,282 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-06-27 17:05:38,289 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:05:38,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:05:38,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:05:38,297 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:05:38,352 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:05:38,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 32 transitions, 78 flow [2024-06-27 17:05:38,418 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-06-27 17:05:38,418 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:05:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 30 events. 6/30 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-27 17:05:38,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 32 transitions, 78 flow [2024-06-27 17:05:38,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 29 transitions, 70 flow [2024-06-27 17:05:38,434 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:05:38,444 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;@70e7a3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:05:38,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:05:38,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:05:38,466 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-06-27 17:05:38,466 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:05:38,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:38,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:38,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1889599126, now seen corresponding path program 1 times [2024-06-27 17:05:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:38,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938497796] [2024-06-27 17:05:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:38,698 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 17:05:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938497796] [2024-06-27 17:05:38,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938497796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:38,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:38,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:05:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948604543] [2024-06-27 17:05:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:38,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-06-27 17:05:38,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-06-27 17:05:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-06-27 17:05:38,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:38,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:05:38,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:38,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:38,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:38,916 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2024-06-27 17:05:38,916 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-27 17:05:38,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 290 events. 158/290 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1053 event pairs, 116 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 513. Up to 253 conditions per place. [2024-06-27 17:05:38,922 INFO L140 encePairwiseOnDemand]: 30/32 looper letters, 22 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-06-27 17:05:38,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 110 flow [2024-06-27 17:05:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-06-27 17:05:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-06-27 17:05:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 38 transitions. [2024-06-27 17:05:38,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 17:05:38,937 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 70 flow. Second operand 2 states and 38 transitions. [2024-06-27 17:05:38,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 110 flow [2024-06-27 17:05:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:05:38,943 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-06-27 17:05:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-06-27 17:05:38,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-06-27 17:05:38,950 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-06-27 17:05:38,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:05:38,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:38,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:38,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:05:38,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:38,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:38,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1159708757, now seen corresponding path program 1 times [2024-06-27 17:05:38,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944872890] [2024-06-27 17:05:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:39,144 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 17:05:39,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:39,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944872890] [2024-06-27 17:05:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944872890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:39,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:39,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:05:39,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908155959] [2024-06-27 17:05:39,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:05:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:05:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:05:39,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:39,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 17:05:39,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:39,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:39,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:39,287 INFO L124 PetriNetUnfolderBase]: 256/457 cut-off events. [2024-06-27 17:05:39,287 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:05:39,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 457 events. 256/457 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1837 event pairs, 96 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 893. Up to 228 conditions per place. [2024-06-27 17:05:39,294 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 34 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2024-06-27 17:05:39,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 44 transitions, 173 flow [2024-06-27 17:05:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:05:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:05:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 17:05:39,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 17:05:39,298 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-06-27 17:05:39,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 44 transitions, 173 flow [2024-06-27 17:05:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:05:39,303 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 70 flow [2024-06-27 17:05:39,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-06-27 17:05:39,304 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-06-27 17:05:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 70 flow [2024-06-27 17:05:39,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 17:05:39,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:39,306 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] [2024-06-27 17:05:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:05:39,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash -930542238, now seen corresponding path program 1 times [2024-06-27 17:05:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:39,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066863626] [2024-06-27 17:05:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:39,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:39,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:39,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066863626] [2024-06-27 17:05:39,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066863626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:39,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:39,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:05:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109200540] [2024-06-27 17:05:39,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:05:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:05:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:05:39,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:39,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 17:05:39,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:39,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:39,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:39,560 INFO L124 PetriNetUnfolderBase]: 287/534 cut-off events. [2024-06-27 17:05:39,560 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-27 17:05:39,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 287/534 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2139 event pairs, 126 based on Foata normal form. 14/459 useless extension candidates. Maximal degree in co-relation 1051. Up to 318 conditions per place. [2024-06-27 17:05:39,563 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 27 selfloop transitions, 3 changer transitions 6/41 dead transitions. [2024-06-27 17:05:39,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 170 flow [2024-06-27 17:05:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:05:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:05:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-06-27 17:05:39,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 17:05:39,567 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 70 flow. Second operand 3 states and 57 transitions. [2024-06-27 17:05:39,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 170 flow [2024-06-27 17:05:39,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:39,570 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 87 flow [2024-06-27 17:05:39,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-06-27 17:05:39,572 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-06-27 17:05:39,572 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 87 flow [2024-06-27 17:05:39,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 17:05:39,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:39,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:05:39,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:05:39,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -487430840, now seen corresponding path program 1 times [2024-06-27 17:05:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453271892] [2024-06-27 17:05:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:39,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453271892] [2024-06-27 17:05:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453271892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:05:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944468341] [2024-06-27 17:05:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:05:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:05:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:05:39,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:39,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 17:05:39,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:39,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:39,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:39,898 INFO L124 PetriNetUnfolderBase]: 355/668 cut-off events. [2024-06-27 17:05:39,898 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-06-27 17:05:39,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1422 conditions, 668 events. 355/668 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2928 event pairs, 289 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 1416. Up to 480 conditions per place. [2024-06-27 17:05:39,902 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 24 selfloop transitions, 2 changer transitions 15/46 dead transitions. [2024-06-27 17:05:39,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 205 flow [2024-06-27 17:05:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:05:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:05:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-27 17:05:39,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-06-27 17:05:39,904 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 87 flow. Second operand 4 states and 67 transitions. [2024-06-27 17:05:39,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 205 flow [2024-06-27 17:05:39,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:39,906 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2024-06-27 17:05:39,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-06-27 17:05:39,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-06-27 17:05:39,908 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2024-06-27 17:05:39,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 17:05:39,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:39,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:05:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:05:39,910 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:39,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:39,910 INFO L85 PathProgramCache]: Analyzing trace with hash 909190841, now seen corresponding path program 1 times [2024-06-27 17:05:39,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:39,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179465432] [2024-06-27 17:05:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:40,856 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 17:05:40,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179465432] [2024-06-27 17:05:40,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179465432] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:40,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347854819] [2024-06-27 17:05:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:40,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:40,859 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 17:05:40,865 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 17:05:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:40,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 17:05:40,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:41,070 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 17:05:41,387 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 17:05:41,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:41,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-06-27 17:05:42,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:42,015 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 78 treesize of output 68 [2024-06-27 17:05:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:42,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347854819] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:42,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:42,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-06-27 17:05:42,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721060309] [2024-06-27 17:05:42,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:05:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:05:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:05:42,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:42,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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 17:05:42,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:42,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:42,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:43,302 INFO L124 PetriNetUnfolderBase]: 1195/2237 cut-off events. [2024-06-27 17:05:43,302 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-06-27 17:05:43,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 2237 events. 1195/2237 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12321 event pairs, 330 based on Foata normal form. 19/2012 useless extension candidates. Maximal degree in co-relation 4786. Up to 500 conditions per place. [2024-06-27 17:05:43,313 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 116 selfloop transitions, 28 changer transitions 30/179 dead transitions. [2024-06-27 17:05:43,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 179 transitions, 852 flow [2024-06-27 17:05:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:05:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:05:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 281 transitions. [2024-06-27 17:05:43,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2024-06-27 17:05:43,324 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 15 states and 281 transitions. [2024-06-27 17:05:43,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 179 transitions, 852 flow [2024-06-27 17:05:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 179 transitions, 828 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 17:05:43,329 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 353 flow [2024-06-27 17:05:43,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=353, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2024-06-27 17:05:43,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-27 17:05:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 353 flow [2024-06-27 17:05:43,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 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 17:05:43,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:43,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:05:43,351 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 17:05:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:43,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:43,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 110229209, now seen corresponding path program 1 times [2024-06-27 17:05:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845350416] [2024-06-27 17:05:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845350416] [2024-06-27 17:05:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845350416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:05:43,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458943505] [2024-06-27 17:05:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:43,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:05:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:05:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:05:43,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 32 [2024-06-27 17:05:43,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 17:05:43,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:43,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 32 [2024-06-27 17:05:43,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:43,864 INFO L124 PetriNetUnfolderBase]: 1252/2195 cut-off events. [2024-06-27 17:05:43,864 INFO L125 PetriNetUnfolderBase]: For 1271/1271 co-relation queries the response was YES. [2024-06-27 17:05:43,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 2195 events. 1252/2195 cut-off events. For 1271/1271 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 11149 event pairs, 765 based on Foata normal form. 22/2064 useless extension candidates. Maximal degree in co-relation 5340. Up to 1734 conditions per place. [2024-06-27 17:05:43,877 INFO L140 encePairwiseOnDemand]: 29/32 looper letters, 62 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2024-06-27 17:05:43,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 486 flow [2024-06-27 17:05:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:05:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:05:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-27 17:05:43,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 17:05:43,878 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 353 flow. Second operand 3 states and 54 transitions. [2024-06-27 17:05:43,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 486 flow [2024-06-27 17:05:43,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 442 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:43,886 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 250 flow [2024-06-27 17:05:43,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-27 17:05:43,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-27 17:05:43,887 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 250 flow [2024-06-27 17:05:43,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 17:05:43,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:43,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 17:05:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:05:43,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:43,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash -507859114, now seen corresponding path program 2 times [2024-06-27 17:05:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:43,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743585745] [2024-06-27 17:05:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:44,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:44,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743585745] [2024-06-27 17:05:44,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743585745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:44,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204101151] [2024-06-27 17:05:44,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:05:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:44,612 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 17:05:44,638 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 17:05:44,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:05:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:44,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2024-06-27 17:05:44,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:05:44,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:44,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:44,847 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 40 treesize of output 24 [2024-06-27 17:05:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:05:44,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204101151] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:44,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:44,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 13 [2024-06-27 17:05:44,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37971185] [2024-06-27 17:05:44,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:44,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:05:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:05:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:05:44,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:44,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 250 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 17:05:44,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:44,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:44,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:45,360 INFO L124 PetriNetUnfolderBase]: 1143/2115 cut-off events. [2024-06-27 17:05:45,360 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-06-27 17:05:45,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5136 conditions, 2115 events. 1143/2115 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11300 event pairs, 309 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 5119. Up to 673 conditions per place. [2024-06-27 17:05:45,375 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 73 selfloop transitions, 14 changer transitions 16/109 dead transitions. [2024-06-27 17:05:45,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 625 flow [2024-06-27 17:05:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:05:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:05:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 17:05:45,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 17:05:45,377 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 250 flow. Second operand 9 states and 147 transitions. [2024-06-27 17:05:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 625 flow [2024-06-27 17:05:45,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 622 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:45,387 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 316 flow [2024-06-27 17:05:45,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-27 17:05:45,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-27 17:05:45,389 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 316 flow [2024-06-27 17:05:45,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 17:05:45,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:45,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:45,408 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 17:05:45,605 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 17:05:45,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:45,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1977149039, now seen corresponding path program 3 times [2024-06-27 17:05:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:45,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63060020] [2024-06-27 17:05:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:45,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:05:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:45,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63060020] [2024-06-27 17:05:45,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63060020] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:45,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103382036] [2024-06-27 17:05:45,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:05:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:45,689 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 17:05:45,712 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 17:05:45,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-27 17:05:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:45,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 17:05:45,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:05:45,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:05:45,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103382036] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:45,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:45,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-06-27 17:05:45,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794894160] [2024-06-27 17:05:45,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:45,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:05:45,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:05:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:05:45,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:45,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 17:05:45,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:45,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:45,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:46,353 INFO L124 PetriNetUnfolderBase]: 1943/3679 cut-off events. [2024-06-27 17:05:46,353 INFO L125 PetriNetUnfolderBase]: For 2560/2560 co-relation queries the response was YES. [2024-06-27 17:05:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8983 conditions, 3679 events. 1943/3679 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 22067 event pairs, 752 based on Foata normal form. 40/3481 useless extension candidates. Maximal degree in co-relation 8964. Up to 1434 conditions per place. [2024-06-27 17:05:46,371 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 72 selfloop transitions, 23 changer transitions 0/101 dead transitions. [2024-06-27 17:05:46,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 716 flow [2024-06-27 17:05:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:05:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:05:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-06-27 17:05:46,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 17:05:46,373 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 316 flow. Second operand 4 states and 80 transitions. [2024-06-27 17:05:46,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 716 flow [2024-06-27 17:05:46,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 655 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 17:05:46,384 INFO L231 Difference]: Finished difference. Result has 62 places, 76 transitions, 506 flow [2024-06-27 17:05:46,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=506, PETRI_PLACES=62, PETRI_TRANSITIONS=76} [2024-06-27 17:05:46,387 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-27 17:05:46,387 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 76 transitions, 506 flow [2024-06-27 17:05:46,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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 17:05:46,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:46,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:46,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:46,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:46,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:46,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1805096591, now seen corresponding path program 4 times [2024-06-27 17:05:46,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:46,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874035387] [2024-06-27 17:05:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:46,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:05:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874035387] [2024-06-27 17:05:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874035387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:05:46,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:05:46,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:05:46,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350308836] [2024-06-27 17:05:46,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:05:46,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:05:46,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:05:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:05:46,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 32 [2024-06-27 17:05:46,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 76 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:05:46,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:46,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 32 [2024-06-27 17:05:46,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:47,201 INFO L124 PetriNetUnfolderBase]: 2701/4703 cut-off events. [2024-06-27 17:05:47,202 INFO L125 PetriNetUnfolderBase]: For 4078/4078 co-relation queries the response was YES. [2024-06-27 17:05:47,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 4703 events. 2701/4703 cut-off events. For 4078/4078 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 25585 event pairs, 542 based on Foata normal form. 242/4588 useless extension candidates. Maximal degree in co-relation 12362. Up to 2391 conditions per place. [2024-06-27 17:05:47,228 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 80 selfloop transitions, 4 changer transitions 4/90 dead transitions. [2024-06-27 17:05:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 752 flow [2024-06-27 17:05:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:05:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:05:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-06-27 17:05:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-06-27 17:05:47,230 INFO L175 Difference]: Start difference. First operand has 62 places, 76 transitions, 506 flow. Second operand 4 states and 63 transitions. [2024-06-27 17:05:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 752 flow [2024-06-27 17:05:47,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 742 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:47,239 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 406 flow [2024-06-27 17:05:47,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-27 17:05:47,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-27 17:05:47,241 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 406 flow [2024-06-27 17:05:47,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 17:05:47,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:47,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:05:47,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:47,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash -926560523, now seen corresponding path program 1 times [2024-06-27 17:05:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:47,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218832898] [2024-06-27 17:05:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:47,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:48,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218832898] [2024-06-27 17:05:48,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218832898] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531492307] [2024-06-27 17:05:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:48,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:48,332 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) [2024-06-27 17:05:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:05:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:48,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 17:05:48,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:48,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:49,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:05:49,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-06-27 17:05:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:49,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531492307] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:49,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:49,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-06-27 17:05:49,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061123402] [2024-06-27 17:05:49,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:49,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 17:05:49,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 17:05:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2024-06-27 17:05:49,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:49,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 406 flow. Second operand has 30 states, 30 states have (on average 9.666666666666666) internal successors, (290), 30 states have internal predecessors, (290), 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 17:05:49,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:49,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:49,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:05:53,668 INFO L124 PetriNetUnfolderBase]: 6383/12286 cut-off events. [2024-06-27 17:05:53,668 INFO L125 PetriNetUnfolderBase]: For 15433/15441 co-relation queries the response was YES. [2024-06-27 17:05:53,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33400 conditions, 12286 events. 6383/12286 cut-off events. For 15433/15441 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 86891 event pairs, 899 based on Foata normal form. 82/11535 useless extension candidates. Maximal degree in co-relation 33379. Up to 2055 conditions per place. [2024-06-27 17:05:53,721 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 357 selfloop transitions, 124 changer transitions 170/658 dead transitions. [2024-06-27 17:05:53,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 658 transitions, 3942 flow [2024-06-27 17:05:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-06-27 17:05:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-06-27 17:05:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1018 transitions. [2024-06-27 17:05:53,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680803571428571 [2024-06-27 17:05:53,726 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 406 flow. Second operand 56 states and 1018 transitions. [2024-06-27 17:05:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 658 transitions, 3942 flow [2024-06-27 17:05:53,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 658 transitions, 3935 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 17:05:53,750 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 2000 flow [2024-06-27 17:05:53,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2000, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2024-06-27 17:05:53,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-27 17:05:53,751 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 2000 flow [2024-06-27 17:05:53,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.666666666666666) internal successors, (290), 30 states have internal predecessors, (290), 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 17:05:53,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:05:53,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:05:53,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:05:53,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:53,966 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:05:53,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:05:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1337116099, now seen corresponding path program 2 times [2024-06-27 17:05:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:05:53,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710840056] [2024-06-27 17:05:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:05:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:05:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:05:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:55,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:05:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710840056] [2024-06-27 17:05:55,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710840056] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:05:55,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731676949] [2024-06-27 17:05:55,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:05:55,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:05:55,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:05:55,172 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) [2024-06-27 17:05:55,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:05:55,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:05:55,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:05:55,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:05:55,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:05:55,810 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-06-27 17:05:55,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-06-27 17:05:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:55,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:05:56,183 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:05:56,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-06-27 17:05:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:05:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731676949] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:05:56,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:05:56,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-06-27 17:05:56,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330514107] [2024-06-27 17:05:56,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:05:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 17:05:56,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:05:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 17:05:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2024-06-27 17:05:56,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:05:56,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 2000 flow. Second operand has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 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 17:05:56,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:05:56,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:05:56,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:04,356 INFO L124 PetriNetUnfolderBase]: 15697/30276 cut-off events. [2024-06-27 17:06:04,356 INFO L125 PetriNetUnfolderBase]: For 109144/109144 co-relation queries the response was YES. [2024-06-27 17:06:04,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93956 conditions, 30276 events. 15697/30276 cut-off events. For 109144/109144 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 246225 event pairs, 3338 based on Foata normal form. 41/28320 useless extension candidates. Maximal degree in co-relation 93904. Up to 4975 conditions per place. [2024-06-27 17:06:04,742 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 432 selfloop transitions, 263 changer transitions 119/821 dead transitions. [2024-06-27 17:06:04,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 821 transitions, 7940 flow [2024-06-27 17:06:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 17:06:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 17:06:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 793 transitions. [2024-06-27 17:06:04,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763081395348837 [2024-06-27 17:06:04,748 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 2000 flow. Second operand 43 states and 793 transitions. [2024-06-27 17:06:04,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 821 transitions, 7940 flow [2024-06-27 17:06:05,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 821 transitions, 6768 flow, removed 577 selfloop flow, removed 7 redundant places. [2024-06-27 17:06:05,370 INFO L231 Difference]: Finished difference. Result has 209 places, 384 transitions, 4706 flow [2024-06-27 17:06:05,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4706, PETRI_PLACES=209, PETRI_TRANSITIONS=384} [2024-06-27 17:06:05,371 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-27 17:06:05,371 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 384 transitions, 4706 flow [2024-06-27 17:06:05,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.89655172413793) internal successors, (287), 29 states have internal predecessors, (287), 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 17:06:05,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:05,372 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:05,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:05,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 17:06:05,587 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:05,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:05,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2122004758, now seen corresponding path program 3 times [2024-06-27 17:06:05,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:05,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116920175] [2024-06-27 17:06:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:05,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116920175] [2024-06-27 17:06:07,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116920175] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77526015] [2024-06-27 17:06:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:06:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:07,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:07,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:06:07,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-06-27 17:06:07,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:07,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 17:06:07,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:07,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:07,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:07,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-06-27 17:06:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77526015] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:08,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2024-06-27 17:06:08,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203261393] [2024-06-27 17:06:08,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:08,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:06:08,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:06:08,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:06:08,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:06:08,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 384 transitions, 4706 flow. Second operand has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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 17:06:08,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:08,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:06:08,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:14,598 INFO L124 PetriNetUnfolderBase]: 16750/32115 cut-off events. [2024-06-27 17:06:14,599 INFO L125 PetriNetUnfolderBase]: For 183881/183881 co-relation queries the response was YES. [2024-06-27 17:06:14,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108453 conditions, 32115 events. 16750/32115 cut-off events. For 183881/183881 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 263052 event pairs, 7258 based on Foata normal form. 2/29985 useless extension candidates. Maximal degree in co-relation 108375. Up to 22496 conditions per place. [2024-06-27 17:06:14,943 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 420 selfloop transitions, 69 changer transitions 56/552 dead transitions. [2024-06-27 17:06:14,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 552 transitions, 6805 flow [2024-06-27 17:06:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:06:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:06:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 305 transitions. [2024-06-27 17:06:14,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295138888888888 [2024-06-27 17:06:14,945 INFO L175 Difference]: Start difference. First operand has 209 places, 384 transitions, 4706 flow. Second operand 18 states and 305 transitions. [2024-06-27 17:06:14,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 552 transitions, 6805 flow [2024-06-27 17:06:16,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 552 transitions, 5664 flow, removed 554 selfloop flow, removed 12 redundant places. [2024-06-27 17:06:16,800 INFO L231 Difference]: Finished difference. Result has 218 places, 401 transitions, 4148 flow [2024-06-27 17:06:16,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4148, PETRI_PLACES=218, PETRI_TRANSITIONS=401} [2024-06-27 17:06:16,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-27 17:06:16,801 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 401 transitions, 4148 flow [2024-06-27 17:06:16,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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 17:06:16,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:16,802 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:16,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 17:06:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:17,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:17,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -280887448, now seen corresponding path program 4 times [2024-06-27 17:06:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:17,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299746789] [2024-06-27 17:06:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:18,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299746789] [2024-06-27 17:06:18,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299746789] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325396449] [2024-06-27 17:06:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:06:18,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:18,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:18,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:06:18,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:06:18,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:18,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 17:06:18,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:06:18,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:18,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:06:18,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-06-27 17:06:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 17:06:18,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325396449] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:18,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2024-06-27 17:06:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751699858] [2024-06-27 17:06:18,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 17:06:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 17:06:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2024-06-27 17:06:18,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:06:18,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 401 transitions, 4148 flow. Second operand has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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 17:06:18,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:18,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:06:18,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:24,913 INFO L124 PetriNetUnfolderBase]: 17300/33259 cut-off events. [2024-06-27 17:06:24,913 INFO L125 PetriNetUnfolderBase]: For 143498/143498 co-relation queries the response was YES. [2024-06-27 17:06:25,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105396 conditions, 33259 events. 17300/33259 cut-off events. For 143498/143498 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 275388 event pairs, 7295 based on Foata normal form. 4/31062 useless extension candidates. Maximal degree in co-relation 105315. Up to 21756 conditions per place. [2024-06-27 17:06:25,261 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 412 selfloop transitions, 79 changer transitions 60/558 dead transitions. [2024-06-27 17:06:25,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 558 transitions, 5971 flow [2024-06-27 17:06:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:06:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:06:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 324 transitions. [2024-06-27 17:06:25,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328947368421053 [2024-06-27 17:06:25,263 INFO L175 Difference]: Start difference. First operand has 218 places, 401 transitions, 4148 flow. Second operand 19 states and 324 transitions. [2024-06-27 17:06:25,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 558 transitions, 5971 flow [2024-06-27 17:06:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 5858 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 17:06:26,640 INFO L231 Difference]: Finished difference. Result has 233 places, 408 transitions, 4367 flow [2024-06-27 17:06:26,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4367, PETRI_PLACES=233, PETRI_TRANSITIONS=408} [2024-06-27 17:06:26,641 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-27 17:06:26,641 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 408 transitions, 4367 flow [2024-06-27 17:06:26,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.541666666666666) internal successors, (253), 24 states have internal predecessors, (253), 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 17:06:26,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:26,642 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:26,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:26,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:26,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:26,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash -244335542, now seen corresponding path program 5 times [2024-06-27 17:06:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:26,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444897615] [2024-06-27 17:06:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:06:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:26,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444897615] [2024-06-27 17:06:26,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444897615] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:26,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416574175] [2024-06-27 17:06:26,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:06:26,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:26,924 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:26,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:06:27,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-06-27 17:06:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:27,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:06:27,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 17:06:27,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:06:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416574175] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:27,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:27,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2024-06-27 17:06:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176427409] [2024-06-27 17:06:27,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:27,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 17:06:27,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 17:06:27,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2024-06-27 17:06:27,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:06:27,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 408 transitions, 4367 flow. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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 17:06:27,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:27,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:06:27,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:34,650 INFO L124 PetriNetUnfolderBase]: 22514/43497 cut-off events. [2024-06-27 17:06:34,650 INFO L125 PetriNetUnfolderBase]: For 212891/212891 co-relation queries the response was YES. [2024-06-27 17:06:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141152 conditions, 43497 events. 22514/43497 cut-off events. For 212891/212891 co-relation queries the response was YES. Maximal size of possible extension queue 818. Compared 376621 event pairs, 6398 based on Foata normal form. 146/40772 useless extension candidates. Maximal degree in co-relation 141068. Up to 21175 conditions per place. [2024-06-27 17:06:35,561 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 350 selfloop transitions, 223 changer transitions 0/580 dead transitions. [2024-06-27 17:06:35,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 580 transitions, 7478 flow [2024-06-27 17:06:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:06:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:06:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-27 17:06:35,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 17:06:35,563 INFO L175 Difference]: Start difference. First operand has 233 places, 408 transitions, 4367 flow. Second operand 5 states and 102 transitions. [2024-06-27 17:06:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 580 transitions, 7478 flow [2024-06-27 17:06:37,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 580 transitions, 7216 flow, removed 58 selfloop flow, removed 21 redundant places. [2024-06-27 17:06:37,399 INFO L231 Difference]: Finished difference. Result has 219 places, 514 transitions, 6534 flow [2024-06-27 17:06:37,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6534, PETRI_PLACES=219, PETRI_TRANSITIONS=514} [2024-06-27 17:06:37,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-27 17:06:37,400 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 514 transitions, 6534 flow [2024-06-27 17:06:37,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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 17:06:37,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:37,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:37,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:37,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:06:37,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:37,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:37,601 INFO L85 PathProgramCache]: Analyzing trace with hash 286188625, now seen corresponding path program 6 times [2024-06-27 17:06:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776064951] [2024-06-27 17:06:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-27 17:06:37,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:37,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776064951] [2024-06-27 17:06:37,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776064951] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:37,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874553830] [2024-06-27 17:06:37,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:06:37,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:37,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:37,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:37,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:06:37,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-27 17:06:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:37,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:06:37,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:06:38,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:06:38,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874553830] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:38,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:38,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-06-27 17:06:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488209077] [2024-06-27 17:06:38,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:38,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:06:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:38,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:06:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:06:38,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:06:38,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 514 transitions, 6534 flow. Second operand has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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 17:06:38,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:38,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:06:38,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:46,234 INFO L124 PetriNetUnfolderBase]: 21966/42236 cut-off events. [2024-06-27 17:06:46,235 INFO L125 PetriNetUnfolderBase]: For 226915/226915 co-relation queries the response was YES. [2024-06-27 17:06:46,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142692 conditions, 42236 events. 21966/42236 cut-off events. For 226915/226915 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 369242 event pairs, 11443 based on Foata normal form. 11/39446 useless extension candidates. Maximal degree in co-relation 142612. Up to 36864 conditions per place. [2024-06-27 17:06:46,730 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 489 selfloop transitions, 6 changer transitions 50/552 dead transitions. [2024-06-27 17:06:46,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 552 transitions, 7549 flow [2024-06-27 17:06:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:06:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:06:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 17:06:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 17:06:46,731 INFO L175 Difference]: Start difference. First operand has 219 places, 514 transitions, 6534 flow. Second operand 9 states and 144 transitions. [2024-06-27 17:06:46,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 552 transitions, 7549 flow [2024-06-27 17:06:49,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 552 transitions, 7268 flow, removed 134 selfloop flow, removed 1 redundant places. [2024-06-27 17:06:49,017 INFO L231 Difference]: Finished difference. Result has 226 places, 498 transitions, 6027 flow [2024-06-27 17:06:49,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=226, PETRI_TRANSITIONS=498} [2024-06-27 17:06:49,018 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-27 17:06:49,018 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 498 transitions, 6027 flow [2024-06-27 17:06:49,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.176470588235293) internal successors, (190), 17 states have internal predecessors, (190), 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 17:06:49,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:49,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:49,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 17:06:49,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:06:49,220 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:49,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1515771856, now seen corresponding path program 7 times [2024-06-27 17:06:49,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:49,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964363479] [2024-06-27 17:06:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:49,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 17:06:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964363479] [2024-06-27 17:06:49,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964363479] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284694099] [2024-06-27 17:06:49,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:06:49,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:49,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:49,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:06:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:49,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:06:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 17:06:49,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-27 17:06:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284694099] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:49,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:49,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-06-27 17:06:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643320734] [2024-06-27 17:06:49,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:49,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:06:49,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:06:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:06:49,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-27 17:06:49,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 498 transitions, 6027 flow. Second operand has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 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 17:06:49,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:49,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-27 17:06:49,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:51,212 INFO L124 PetriNetUnfolderBase]: 4725/9072 cut-off events. [2024-06-27 17:06:51,212 INFO L125 PetriNetUnfolderBase]: For 54246/54246 co-relation queries the response was YES. [2024-06-27 17:06:51,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31499 conditions, 9072 events. 4725/9072 cut-off events. For 54246/54246 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 63215 event pairs, 3787 based on Foata normal form. 66/8515 useless extension candidates. Maximal degree in co-relation 31418. Up to 7103 conditions per place. [2024-06-27 17:06:51,273 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 87 selfloop transitions, 4 changer transitions 60/158 dead transitions. [2024-06-27 17:06:51,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 158 transitions, 1878 flow [2024-06-27 17:06:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:06:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:06:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 17:06:51,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 17:06:51,275 INFO L175 Difference]: Start difference. First operand has 226 places, 498 transitions, 6027 flow. Second operand 10 states and 150 transitions. [2024-06-27 17:06:51,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 158 transitions, 1878 flow [2024-06-27 17:06:51,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 158 transitions, 1524 flow, removed 99 selfloop flow, removed 49 redundant places. [2024-06-27 17:06:51,545 INFO L231 Difference]: Finished difference. Result has 123 places, 98 transitions, 962 flow [2024-06-27 17:06:51,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=962, PETRI_PLACES=123, PETRI_TRANSITIONS=98} [2024-06-27 17:06:51,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-27 17:06:51,546 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 98 transitions, 962 flow [2024-06-27 17:06:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.523809523809524) internal successors, (200), 21 states have internal predecessors, (200), 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 17:06:51,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:51,547 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:06:51,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:51,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:06:51,749 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:06:51,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1077347951, now seen corresponding path program 8 times [2024-06-27 17:06:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114512939] [2024-06-27 17:06:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114512939] [2024-06-27 17:06:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114512939] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:52,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708380341] [2024-06-27 17:06:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:06:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:52,919 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:52,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:06:53,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:06:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:53,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:06:53,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:53,845 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-06-27 17:06:53,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-06-27 17:06:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:53,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:54,370 INFO L349 Elim1Store]: treesize reduction 32, result has 70.6 percent of original size [2024-06-27 17:06:54,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 106