./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:52:47,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:52:47,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:52:47,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:52:47,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:52:47,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:52:47,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:52:47,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:52:47,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:52:47,572 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:52:47,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:52:47,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:52:47,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:52:47,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:52:47,575 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:52:47,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:52:47,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:52:47,576 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:52:47,576 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:52:47,576 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:52:47,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:52:47,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:52:47,578 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:52:47,578 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:52:47,579 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:52:47,579 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:52:47,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:52:47,579 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:52:47,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:52:47,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:52:47,581 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:52:47,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:52:47,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:52:47,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:52:47,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:52:47,582 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:52:47,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:52:47,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:52:47,583 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:52:47,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:52:47,583 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:52:47,584 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:52:47,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:52:47,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-01-27 15:52:47,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:52:47,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:52:47,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:52:47,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:52:47,842 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:52:47,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-01-27 15:52:48,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:52:49,176 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:52:49,177 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-01-27 15:52:49,184 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84823cc8c/1d2caa348ce34645aa77d8497f46abde/FLAG93f8c1c6b [2024-01-27 15:52:49,198 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84823cc8c/1d2caa348ce34645aa77d8497f46abde [2024-01-27 15:52:49,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:52:49,201 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:52:49,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:52:49,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:52:49,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:52:49,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6af00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49, skipping insertion in model container [2024-01-27 15:52:49,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,242 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:52:49,425 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-01-27 15:52:49,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:52:49,443 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:52:49,465 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-01-27 15:52:49,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:52:49,483 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:52:49,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49 WrapperNode [2024-01-27 15:52:49,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:52:49,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:52:49,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:52:49,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:52:49,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,541 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2024-01-27 15:52:49,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:52:49,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:52:49,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:52:49,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:52:49,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,572 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,599 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 1, 2]. [2024-01-27 15:52:49,599 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,618 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,626 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:52:49,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:52:49,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:52:49,632 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:52:49,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (1/1) ... [2024-01-27 15:52:49,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:52:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:49,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:52:49,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:52:49,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:52:49,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:52:49,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:52:49,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:52:49,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:52:49,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:52:49,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:52:49,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:52:49,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:52:49,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:52:49,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:52:49,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:52:49,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:52:49,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:52:49,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:52:49,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:52:49,706 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:52:49,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:52:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:52:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:52:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:52:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:52:49,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:52:49,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:52:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:52:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:52:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:52:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:52:49,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:52:49,713 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:52:49,855 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:52:49,857 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:52:50,294 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:52:50,295 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:52:50,615 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:52:50,615 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-01-27 15:52:50,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:52:50 BoogieIcfgContainer [2024-01-27 15:52:50,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:52:50,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:52:50,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:52:50,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:52:50,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:52:49" (1/3) ... [2024-01-27 15:52:50,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b19f166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:52:50, skipping insertion in model container [2024-01-27 15:52:50,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:52:49" (2/3) ... [2024-01-27 15:52:50,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b19f166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:52:50, skipping insertion in model container [2024-01-27 15:52:50,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:52:50" (3/3) ... [2024-01-27 15:52:50,625 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-01-27 15:52:50,633 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:52:50,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:52:50,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:52:50,640 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:52:50,686 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:52:50,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2024-01-27 15:52:50,763 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2024-01-27 15:52:50,764 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:52:50,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-27 15:52:50,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2024-01-27 15:52:50,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2024-01-27 15:52:50,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:52:50,796 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;@2a0f097f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:52:50,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:52:50,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:52:50,816 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-01-27 15:52:50,817 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:52:50,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:50,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:50,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:50,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1698639946, now seen corresponding path program 1 times [2024-01-27 15:52:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726643873] [2024-01-27 15:52:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:51,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726643873] [2024-01-27 15:52:51,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726643873] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:51,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:51,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:52:51,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148584752] [2024-01-27 15:52:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:51,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:52:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:52:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:52:51,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:51,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:51,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:51,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:51,445 INFO L124 PetriNetUnfolderBase]: 761/1311 cut-off events. [2024-01-27 15:52:51,445 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-01-27 15:52:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 1311 events. 761/1311 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6600 event pairs, 629 based on Foata normal form. 140/1309 useless extension candidates. Maximal degree in co-relation 2182. Up to 1049 conditions per place. [2024-01-27 15:52:51,461 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 30 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2024-01-27 15:52:51,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 158 flow [2024-01-27 15:52:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:52:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:52:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2024-01-27 15:52:51,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-01-27 15:52:51,477 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 102 flow. Second operand 2 states and 58 transitions. [2024-01-27 15:52:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 158 flow [2024-01-27 15:52:51,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:52:51,523 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 86 flow [2024-01-27 15:52:51,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2024-01-27 15:52:51,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2024-01-27 15:52:51,530 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 86 flow [2024-01-27 15:52:51,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:51,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:51,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:52:51,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:51,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash -253187180, now seen corresponding path program 1 times [2024-01-27 15:52:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:51,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52576450] [2024-01-27 15:52:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:51,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52576450] [2024-01-27 15:52:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52576450] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:51,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:52:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423431352] [2024-01-27 15:52:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:51,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:52:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:52:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:52:51,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:51,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:51,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:52,097 INFO L124 PetriNetUnfolderBase]: 767/1295 cut-off events. [2024-01-27 15:52:52,097 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 15:52:52,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 1295 events. 767/1295 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6323 event pairs, 201 based on Foata normal form. 27/1243 useless extension candidates. Maximal degree in co-relation 2425. Up to 933 conditions per place. [2024-01-27 15:52:52,106 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2024-01-27 15:52:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 196 flow [2024-01-27 15:52:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:52:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:52:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-01-27 15:52:52,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-01-27 15:52:52,109 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 86 flow. Second operand 3 states and 82 transitions. [2024-01-27 15:52:52,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 196 flow [2024-01-27 15:52:52,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:52:52,111 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 105 flow [2024-01-27 15:52:52,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2024-01-27 15:52:52,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2024-01-27 15:52:52,113 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 105 flow [2024-01-27 15:52:52,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:52,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:52,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:52:52,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:52,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:52,115 INFO L85 PathProgramCache]: Analyzing trace with hash 526989282, now seen corresponding path program 2 times [2024-01-27 15:52:52,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:52,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81299661] [2024-01-27 15:52:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:52,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:52,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81299661] [2024-01-27 15:52:52,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81299661] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:52,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:52,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:52:52,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658585344] [2024-01-27 15:52:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:52,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:52:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:52:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:52:52,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:52,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:52,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:52,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:52,379 INFO L124 PetriNetUnfolderBase]: 699/1289 cut-off events. [2024-01-27 15:52:52,379 INFO L125 PetriNetUnfolderBase]: For 210/213 co-relation queries the response was YES. [2024-01-27 15:52:52,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2592 conditions, 1289 events. 699/1289 cut-off events. For 210/213 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6483 event pairs, 261 based on Foata normal form. 29/1219 useless extension candidates. Maximal degree in co-relation 2587. Up to 597 conditions per place. [2024-01-27 15:52:52,399 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 43 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-01-27 15:52:52,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 229 flow [2024-01-27 15:52:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:52:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:52:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-27 15:52:52,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014492753623188 [2024-01-27 15:52:52,402 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 105 flow. Second operand 3 states and 83 transitions. [2024-01-27 15:52:52,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 229 flow [2024-01-27 15:52:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:52:52,404 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 114 flow [2024-01-27 15:52:52,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-01-27 15:52:52,406 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-01-27 15:52:52,407 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 114 flow [2024-01-27 15:52:52,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:52,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:52,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:52:52,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:52,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash -893344748, now seen corresponding path program 3 times [2024-01-27 15:52:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:52,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883268541] [2024-01-27 15:52:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:52,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883268541] [2024-01-27 15:52:52,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883268541] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:52,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:52,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:52:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529137781] [2024-01-27 15:52:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:52:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:52:52,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:52:52,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:52,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:52,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:52,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:52,784 INFO L124 PetriNetUnfolderBase]: 747/1380 cut-off events. [2024-01-27 15:52:52,784 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2024-01-27 15:52:52,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1380 events. 747/1380 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6927 event pairs, 550 based on Foata normal form. 27/1310 useless extension candidates. Maximal degree in co-relation 2918. Up to 1005 conditions per place. [2024-01-27 15:52:52,793 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 32 selfloop transitions, 2 changer transitions 13/57 dead transitions. [2024-01-27 15:52:52,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 239 flow [2024-01-27 15:52:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:52:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:52:52,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-01-27 15:52:52,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-27 15:52:52,798 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 114 flow. Second operand 4 states and 98 transitions. [2024-01-27 15:52:52,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 239 flow [2024-01-27 15:52:52,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:52:52,800 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 128 flow [2024-01-27 15:52:52,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2024-01-27 15:52:52,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-01-27 15:52:52,802 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 128 flow [2024-01-27 15:52:52,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:52,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:52,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:52:52,803 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:52,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:52,804 INFO L85 PathProgramCache]: Analyzing trace with hash 156850980, now seen corresponding path program 1 times [2024-01-27 15:52:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180361857] [2024-01-27 15:52:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:52,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180361857] [2024-01-27 15:52:52,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180361857] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:52,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:52,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:52:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138514493] [2024-01-27 15:52:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:52:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:52:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:52:52,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:52,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:52,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:52,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:52,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:53,142 INFO L124 PetriNetUnfolderBase]: 948/1719 cut-off events. [2024-01-27 15:52:53,143 INFO L125 PetriNetUnfolderBase]: For 490/495 co-relation queries the response was YES. [2024-01-27 15:52:53,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3727 conditions, 1719 events. 948/1719 cut-off events. For 490/495 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8994 event pairs, 712 based on Foata normal form. 34/1655 useless extension candidates. Maximal degree in co-relation 3719. Up to 1006 conditions per place. [2024-01-27 15:52:53,156 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 33 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2024-01-27 15:52:53,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 298 flow [2024-01-27 15:52:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:52:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:52:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-01-27 15:52:53,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-01-27 15:52:53,161 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 128 flow. Second operand 4 states and 102 transitions. [2024-01-27 15:52:53,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 298 flow [2024-01-27 15:52:53,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 286 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:52:53,166 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 134 flow [2024-01-27 15:52:53,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-01-27 15:52:53,173 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-01-27 15:52:53,173 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 134 flow [2024-01-27 15:52:53,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:53,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:53,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:53,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:52:53,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:53,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:53,175 INFO L85 PathProgramCache]: Analyzing trace with hash -556197243, now seen corresponding path program 1 times [2024-01-27 15:52:53,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:53,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461537669] [2024-01-27 15:52:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:53,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:52:53,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461537669] [2024-01-27 15:52:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461537669] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:52:53,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:52:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:52:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096528437] [2024-01-27 15:52:53,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:52:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:52:53,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:52:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:52:53,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-27 15:52:53,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:53,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:53,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-27 15:52:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:53,863 INFO L124 PetriNetUnfolderBase]: 1383/2301 cut-off events. [2024-01-27 15:52:53,864 INFO L125 PetriNetUnfolderBase]: For 675/687 co-relation queries the response was YES. [2024-01-27 15:52:53,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5193 conditions, 2301 events. 1383/2301 cut-off events. For 675/687 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12739 event pairs, 368 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 5184. Up to 819 conditions per place. [2024-01-27 15:52:53,876 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 86 selfloop transitions, 9 changer transitions 12/115 dead transitions. [2024-01-27 15:52:53,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 115 transitions, 541 flow [2024-01-27 15:52:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:52:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:52:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-01-27 15:52:53,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-01-27 15:52:53,878 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 134 flow. Second operand 8 states and 191 transitions. [2024-01-27 15:52:53,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 115 transitions, 541 flow [2024-01-27 15:52:53,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 115 transitions, 531 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:52:53,883 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2024-01-27 15:52:53,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-01-27 15:52:53,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-01-27 15:52:53,886 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2024-01-27 15:52:53,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:53,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:53,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:52:53,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:53,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash 783623689, now seen corresponding path program 1 times [2024-01-27 15:52:53,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:53,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258635058] [2024-01-27 15:52:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258635058] [2024-01-27 15:52:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258635058] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:54,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598752232] [2024-01-27 15:52:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:54,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:54,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:54,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:54,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:52:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:54,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:52:54,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:54,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598752232] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:54,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-27 15:52:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260592473] [2024-01-27 15:52:54,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:52:54,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:52:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:52:54,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:52:54,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:54,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:54,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:52:54,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:54,905 INFO L124 PetriNetUnfolderBase]: 1778/3485 cut-off events. [2024-01-27 15:52:54,905 INFO L125 PetriNetUnfolderBase]: For 1514/1519 co-relation queries the response was YES. [2024-01-27 15:52:54,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8140 conditions, 3485 events. 1778/3485 cut-off events. For 1514/1519 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23356 event pairs, 1124 based on Foata normal form. 114/3440 useless extension candidates. Maximal degree in co-relation 8129. Up to 1602 conditions per place. [2024-01-27 15:52:54,923 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 70 selfloop transitions, 5 changer transitions 4/92 dead transitions. [2024-01-27 15:52:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 472 flow [2024-01-27 15:52:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:52:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:52:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-27 15:52:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-01-27 15:52:54,925 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 178 flow. Second operand 6 states and 148 transitions. [2024-01-27 15:52:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 472 flow [2024-01-27 15:52:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 465 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:52:54,929 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 216 flow [2024-01-27 15:52:54,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-01-27 15:52:54,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-01-27 15:52:54,931 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 216 flow [2024-01-27 15:52:54,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:54,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:54,932 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:54,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:52:55,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:55,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:52:55,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2074720407, now seen corresponding path program 2 times [2024-01-27 15:52:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:55,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169345028] [2024-01-27 15:52:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169345028] [2024-01-27 15:52:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169345028] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614369487] [2024-01-27 15:52:55,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:52:55,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:55,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:55,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:52:55,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:52:55,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:55,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:52:55,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:56,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:56,196 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 23 treesize of output 15 [2024-01-27 15:52:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:56,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:56,518 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:52:56,519 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 25 treesize of output 12 [2024-01-27 15:52:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:52:56,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614369487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:56,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:56,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:52:56,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10361634] [2024-01-27 15:52:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:52:56,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:52:56,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:52:56,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-27 15:52:56,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 216 flow. Second operand has 22 states, 22 states have (on average 14.409090909090908) internal successors, (317), 22 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:56,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:56,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-27 15:52:56,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:59,740 INFO L124 PetriNetUnfolderBase]: 8995/15176 cut-off events. [2024-01-27 15:52:59,740 INFO L125 PetriNetUnfolderBase]: For 9779/10467 co-relation queries the response was YES. [2024-01-27 15:52:59,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37747 conditions, 15176 events. 8995/15176 cut-off events. For 9779/10467 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 113128 event pairs, 839 based on Foata normal form. 54/14657 useless extension candidates. Maximal degree in co-relation 37733. Up to 2457 conditions per place. [2024-01-27 15:52:59,859 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 325 selfloop transitions, 45 changer transitions 0/381 dead transitions. [2024-01-27 15:52:59,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 381 transitions, 2008 flow [2024-01-27 15:52:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:52:59,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:52:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 638 transitions. [2024-01-27 15:52:59,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334448160535117 [2024-01-27 15:52:59,862 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 216 flow. Second operand 26 states and 638 transitions. [2024-01-27 15:52:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 381 transitions, 2008 flow [2024-01-27 15:52:59,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 381 transitions, 1945 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-01-27 15:52:59,886 INFO L231 Difference]: Finished difference. Result has 96 places, 100 transitions, 566 flow [2024-01-27 15:52:59,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=566, PETRI_PLACES=96, PETRI_TRANSITIONS=100} [2024-01-27 15:52:59,887 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-01-27 15:52:59,887 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 100 transitions, 566 flow [2024-01-27 15:52:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.409090909090908) internal successors, (317), 22 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:52:59,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:59,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:52:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:00,100 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,SelfDestructingSolverStorable7 [2024-01-27 15:53:00,101 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:00,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1391419433, now seen corresponding path program 1 times [2024-01-27 15:53:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:00,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316860224] [2024-01-27 15:53:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:00,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:53:00,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:00,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316860224] [2024-01-27 15:53:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316860224] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:53:00,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:53:00,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:53:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314819236] [2024-01-27 15:53:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:53:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:53:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:53:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:53:00,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:53:00,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 100 transitions, 566 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:00,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:00,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:53:00,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:03,037 INFO L124 PetriNetUnfolderBase]: 11711/22946 cut-off events. [2024-01-27 15:53:03,037 INFO L125 PetriNetUnfolderBase]: For 41782/43070 co-relation queries the response was YES. [2024-01-27 15:53:03,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63747 conditions, 22946 events. 11711/22946 cut-off events. For 41782/43070 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 211004 event pairs, 3079 based on Foata normal form. 502/22950 useless extension candidates. Maximal degree in co-relation 63723. Up to 7285 conditions per place. [2024-01-27 15:53:03,348 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 153 selfloop transitions, 6 changer transitions 0/183 dead transitions. [2024-01-27 15:53:03,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 183 transitions, 1357 flow [2024-01-27 15:53:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:53:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:53:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-01-27 15:53:03,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-01-27 15:53:03,350 INFO L175 Difference]: Start difference. First operand has 96 places, 100 transitions, 566 flow. Second operand 4 states and 122 transitions. [2024-01-27 15:53:03,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 183 transitions, 1357 flow [2024-01-27 15:53:03,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 183 transitions, 1213 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-01-27 15:53:03,527 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 535 flow [2024-01-27 15:53:03,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-01-27 15:53:03,529 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-01-27 15:53:03,529 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 535 flow [2024-01-27 15:53:03,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:03,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:03,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:03,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:53:03,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:03,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1402875513, now seen corresponding path program 3 times [2024-01-27 15:53:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:03,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825433943] [2024-01-27 15:53:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:04,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:04,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825433943] [2024-01-27 15:53:04,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825433943] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017716317] [2024-01-27 15:53:04,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:53:04,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:04,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:04,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:53:04,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:53:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:04,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:53:04,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:04,759 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:53:04,759 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 23 treesize of output 10 [2024-01-27 15:53:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:04,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:04,970 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:53:04,971 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 25 treesize of output 12 [2024-01-27 15:53:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017716317] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:05,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:05,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:53:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866319480] [2024-01-27 15:53:05,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:05,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:53:05,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:53:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:53:05,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-27 15:53:05,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 535 flow. Second operand has 22 states, 22 states have (on average 14.545454545454545) internal successors, (320), 22 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:05,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:05,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-27 15:53:05,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:09,954 INFO L124 PetriNetUnfolderBase]: 21674/36290 cut-off events. [2024-01-27 15:53:09,954 INFO L125 PetriNetUnfolderBase]: For 107813/110314 co-relation queries the response was YES. [2024-01-27 15:53:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116861 conditions, 36290 events. 21674/36290 cut-off events. For 107813/110314 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 298788 event pairs, 3569 based on Foata normal form. 400/36479 useless extension candidates. Maximal degree in co-relation 116836. Up to 8718 conditions per place. [2024-01-27 15:53:10,273 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 306 selfloop transitions, 62 changer transitions 0/379 dead transitions. [2024-01-27 15:53:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 379 transitions, 2609 flow [2024-01-27 15:53:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:53:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:53:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 513 transitions. [2024-01-27 15:53:10,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531055900621118 [2024-01-27 15:53:10,277 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 535 flow. Second operand 21 states and 513 transitions. [2024-01-27 15:53:10,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 379 transitions, 2609 flow [2024-01-27 15:53:10,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 379 transitions, 2565 flow, removed 22 selfloop flow, removed 0 redundant places. [2024-01-27 15:53:10,534 INFO L231 Difference]: Finished difference. Result has 128 places, 136 transitions, 1037 flow [2024-01-27 15:53:10,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1037, PETRI_PLACES=128, PETRI_TRANSITIONS=136} [2024-01-27 15:53:10,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-01-27 15:53:10,535 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 136 transitions, 1037 flow [2024-01-27 15:53:10,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.545454545454545) internal successors, (320), 22 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:10,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:10,536 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:10,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:53:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:10,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:10,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash -610597199, now seen corresponding path program 4 times [2024-01-27 15:53:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:10,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348608484] [2024-01-27 15:53:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348608484] [2024-01-27 15:53:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348608484] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281672635] [2024-01-27 15:53:11,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:53:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:11,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:11,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:53:11,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:53:11,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:11,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:53:11,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:53:12,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:12,072 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:53:12,073 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 25 treesize of output 12 [2024-01-27 15:53:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:53:12,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281672635] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:12,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:12,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2024-01-27 15:53:12,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174821154] [2024-01-27 15:53:12,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:12,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:53:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:53:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:53:12,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-27 15:53:12,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 136 transitions, 1037 flow. Second operand has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:12,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:12,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-27 15:53:12,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:16,923 INFO L124 PetriNetUnfolderBase]: 22356/38602 cut-off events. [2024-01-27 15:53:16,923 INFO L125 PetriNetUnfolderBase]: For 183489/185801 co-relation queries the response was YES. [2024-01-27 15:53:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136700 conditions, 38602 events. 22356/38602 cut-off events. For 183489/185801 co-relation queries the response was YES. Maximal size of possible extension queue 1532. Compared 330632 event pairs, 5962 based on Foata normal form. 204/38495 useless extension candidates. Maximal degree in co-relation 136663. Up to 21228 conditions per place. [2024-01-27 15:53:17,277 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 193 selfloop transitions, 64 changer transitions 0/268 dead transitions. [2024-01-27 15:53:17,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 268 transitions, 2385 flow [2024-01-27 15:53:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:53:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:53:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 308 transitions. [2024-01-27 15:53:17,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463768115942029 [2024-01-27 15:53:17,284 INFO L175 Difference]: Start difference. First operand has 128 places, 136 transitions, 1037 flow. Second operand 15 states and 308 transitions. [2024-01-27 15:53:17,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 268 transitions, 2385 flow [2024-01-27 15:53:18,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 268 transitions, 2189 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-01-27 15:53:18,226 INFO L231 Difference]: Finished difference. Result has 135 places, 151 transitions, 1246 flow [2024-01-27 15:53:18,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1246, PETRI_PLACES=135, PETRI_TRANSITIONS=151} [2024-01-27 15:53:18,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-01-27 15:53:18,227 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 151 transitions, 1246 flow [2024-01-27 15:53:18,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.0625) internal successors, (241), 16 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:18,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:18,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:18,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:18,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:18,428 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:18,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 631323628, now seen corresponding path program 1 times [2024-01-27 15:53:18,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:18,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082780533] [2024-01-27 15:53:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:18,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082780533] [2024-01-27 15:53:18,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082780533] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:18,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206585904] [2024-01-27 15:53:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:18,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:18,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:18,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:18,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:53:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:18,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:53:18,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:18,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:53:18,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206585904] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:18,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:18,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-01-27 15:53:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734618606] [2024-01-27 15:53:18,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:53:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:53:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:53:18,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:53:18,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 151 transitions, 1246 flow. Second operand has 13 states, 13 states have (on average 16.384615384615383) internal successors, (213), 13 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:18,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:18,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:53:18,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:22,570 INFO L124 PetriNetUnfolderBase]: 16905/31774 cut-off events. [2024-01-27 15:53:22,570 INFO L125 PetriNetUnfolderBase]: For 153429/155758 co-relation queries the response was YES. [2024-01-27 15:53:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110470 conditions, 31774 events. 16905/31774 cut-off events. For 153429/155758 co-relation queries the response was YES. Maximal size of possible extension queue 1321. Compared 290758 event pairs, 6064 based on Foata normal form. 256/31368 useless extension candidates. Maximal degree in co-relation 110433. Up to 23899 conditions per place. [2024-01-27 15:53:22,793 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 113 selfloop transitions, 9 changer transitions 38/194 dead transitions. [2024-01-27 15:53:22,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 194 transitions, 1690 flow [2024-01-27 15:53:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:53:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:53:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-01-27 15:53:22,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:53:22,795 INFO L175 Difference]: Start difference. First operand has 135 places, 151 transitions, 1246 flow. Second operand 8 states and 184 transitions. [2024-01-27 15:53:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 194 transitions, 1690 flow [2024-01-27 15:53:23,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 194 transitions, 1666 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-27 15:53:23,202 INFO L231 Difference]: Finished difference. Result has 139 places, 149 transitions, 1224 flow [2024-01-27 15:53:23,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1224, PETRI_PLACES=139, PETRI_TRANSITIONS=149} [2024-01-27 15:53:23,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-01-27 15:53:23,203 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 149 transitions, 1224 flow [2024-01-27 15:53:23,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.384615384615383) internal successors, (213), 13 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:23,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:23,204 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:23,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:23,406 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,SelfDestructingSolverStorable11 [2024-01-27 15:53:23,406 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:23,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -340000316, now seen corresponding path program 1 times [2024-01-27 15:53:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:23,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863625594] [2024-01-27 15:53:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:23,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:53:23,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863625594] [2024-01-27 15:53:23,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863625594] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:23,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074629693] [2024-01-27 15:53:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:23,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:23,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:23,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:23,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:53:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:23,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:53:23,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:53:23,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:53:23,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074629693] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:23,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:23,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-27 15:53:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013771276] [2024-01-27 15:53:23,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:23,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:53:23,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:23,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:53:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:53:23,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-27 15:53:23,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 149 transitions, 1224 flow. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:23,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:23,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-27 15:53:23,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:53:28,668 INFO L124 PetriNetUnfolderBase]: 21682/41432 cut-off events. [2024-01-27 15:53:28,669 INFO L125 PetriNetUnfolderBase]: For 196548/198946 co-relation queries the response was YES. [2024-01-27 15:53:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142080 conditions, 41432 events. 21682/41432 cut-off events. For 196548/198946 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 395735 event pairs, 12806 based on Foata normal form. 864/41519 useless extension candidates. Maximal degree in co-relation 142040. Up to 24483 conditions per place. [2024-01-27 15:53:29,304 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 110 selfloop transitions, 6 changer transitions 102/252 dead transitions. [2024-01-27 15:53:29,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 252 transitions, 2453 flow [2024-01-27 15:53:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:53:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:53:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-01-27 15:53:29,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-27 15:53:29,307 INFO L175 Difference]: Start difference. First operand has 139 places, 149 transitions, 1224 flow. Second operand 6 states and 147 transitions. [2024-01-27 15:53:29,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 252 transitions, 2453 flow [2024-01-27 15:53:30,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 252 transitions, 2407 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 15:53:30,215 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1227 flow [2024-01-27 15:53:30,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1227, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-01-27 15:53:30,216 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-01-27 15:53:30,216 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1227 flow [2024-01-27 15:53:30,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:30,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:53:30,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:53:30,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:53:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:30,418 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:53:30,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:53:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash -844408133, now seen corresponding path program 2 times [2024-01-27 15:53:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:53:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238807340] [2024-01-27 15:53:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:53:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:53:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:53:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:53:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:53:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238807340] [2024-01-27 15:53:31,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238807340] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:53:31,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254996141] [2024-01-27 15:53:31,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:53:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:53:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:53:31,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:53:31,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:53:31,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:53:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:53:31,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:53:31,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:53:31,645 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2024-01-27 15:53:31,645 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 24 treesize of output 7 [2024-01-27 15:53:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:53:31,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:53:32,284 INFO L349 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2024-01-27 15:53:32,285 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 45 treesize of output 82 [2024-01-27 15:53:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:53:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254996141] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:53:32,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:53:32,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-01-27 15:53:32,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884279196] [2024-01-27 15:53:32,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:53:32,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:53:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:53:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:53:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:53:32,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-01-27 15:53:32,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1227 flow. Second operand has 31 states, 31 states have (on average 12.129032258064516) internal successors, (376), 31 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:53:32,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:53:32,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-01-27 15:53:32,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand