./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.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/chl-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:19:43,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:19:43,564 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:19:43,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:19:43,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:19:43,600 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:19:43,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:19:43,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:19:43,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:19:43,604 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:19:43,605 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:19:43,605 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:19:43,605 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:19:43,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:19:43,607 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:19:43,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:19:43,607 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:19:43,607 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:19:43,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:19:43,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:19:43,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:19:43,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:19:43,609 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:19:43,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:19:43,609 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:19:43,609 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:19:43,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:19:43,610 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:19:43,610 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:19:43,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:19:43,611 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:19:43,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:19:43,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:43,612 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:19:43,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:19:43,612 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:19:43,612 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:19:43,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:19:43,612 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:19:43,613 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:19:43,613 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:19:43,613 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:19:43,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:19:43,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-01-27 15:19:43,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:19:43,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:19:43,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:19:43,928 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:19:43,928 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:19:43,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2024-01-27 15:19:45,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:19:45,240 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:19:45,241 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2024-01-27 15:19:45,248 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/139089b5f/7d134bf5a64a426281b8db6cc479ef7e/FLAGbc2af6af5 [2024-01-27 15:19:45,259 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/139089b5f/7d134bf5a64a426281b8db6cc479ef7e [2024-01-27 15:19:45,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:19:45,262 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:19:45,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:45,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:19:45,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:19:45,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ace8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45, skipping insertion in model container [2024-01-27 15:19:45,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,288 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:19:45,429 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/chl-chromosome-trans.wvr.c[3073,3086] [2024-01-27 15:19:45,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:45,447 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:19:45,469 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/chl-chromosome-trans.wvr.c[3073,3086] [2024-01-27 15:19:45,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:45,488 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:19:45,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45 WrapperNode [2024-01-27 15:19:45,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:45,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:45,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:19:45,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:19:45,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,542 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2024-01-27 15:19:45,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:45,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:19:45,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:19:45,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:19:45,553 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,574 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 2, 9]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2024-01-27 15:19:45,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,591 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:19:45,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:19:45,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:19:45,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:19:45,599 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (1/1) ... [2024-01-27 15:19:45,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:45,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:45,641 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 15:19:45,670 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 15:19:45,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:19:45,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:19:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:19:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:19:45,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:19:45,695 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:19:45,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:19:45,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:19:45,698 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 15:19:45,815 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:19:45,817 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:19:46,227 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:19:46,227 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:19:46,611 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:19:46,611 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 15:19:46,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:46 BoogieIcfgContainer [2024-01-27 15:19:46,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:19:46,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:19:46,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:19:46,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:19:46,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:19:45" (1/3) ... [2024-01-27 15:19:46,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aca22c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:46, skipping insertion in model container [2024-01-27 15:19:46,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:45" (2/3) ... [2024-01-27 15:19:46,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aca22c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:46, skipping insertion in model container [2024-01-27 15:19:46,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:46" (3/3) ... [2024-01-27 15:19:46,621 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-01-27 15:19:46,630 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:19:46,638 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:19:46,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:19:46,639 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:19:46,694 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:19:46,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:19:46,776 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-01-27 15:19:46,776 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:19:46,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-01-27 15:19:46,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:19:46,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2024-01-27 15:19:46,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:19:46,805 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;@44c4ef57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:19:46,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:19:46,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:19:46,823 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-01-27 15:19:46,823 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:19:46,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:46,824 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] [2024-01-27 15:19:46,824 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 15:19:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash 552748514, now seen corresponding path program 1 times [2024-01-27 15:19:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:46,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207778190] [2024-01-27 15:19:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:46,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:47,303 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 15:19:47,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207778190] [2024-01-27 15:19:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207778190] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:47,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:47,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:19:47,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533291604] [2024-01-27 15:19:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:47,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:19:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:19:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:19:47,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:19:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:47,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:47,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:47,523 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2024-01-27 15:19:47,523 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-01-27 15:19:47,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2024-01-27 15:19:47,527 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2024-01-27 15:19:47,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2024-01-27 15:19:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:19:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:19:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-01-27 15:19:47,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-01-27 15:19:47,539 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2024-01-27 15:19:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2024-01-27 15:19:47,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:19:47,544 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2024-01-27 15:19:47,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-27 15:19:47,549 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-27 15:19:47,549 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2024-01-27 15:19:47,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:19:47,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:47,550 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 15:19:47,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:19:47,550 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 15:19:47,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:47,551 INFO L85 PathProgramCache]: Analyzing trace with hash -724749522, now seen corresponding path program 1 times [2024-01-27 15:19:47,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:47,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308290921] [2024-01-27 15:19:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:47,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:47,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:47,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308290921] [2024-01-27 15:19:47,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308290921] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:47,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:47,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:47,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135858135] [2024-01-27 15:19:47,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:47,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:47,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:47,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:19:47,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:47,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:47,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:47,926 INFO L124 PetriNetUnfolderBase]: 341/506 cut-off events. [2024-01-27 15:19:47,927 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-01-27 15:19:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 506 events. 341/506 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1010. Up to 335 conditions per place. [2024-01-27 15:19:47,932 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 41 selfloop transitions, 2 changer transitions 2/46 dead transitions. [2024-01-27 15:19:47,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 217 flow [2024-01-27 15:19:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:19:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:19:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-27 15:19:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:19:47,934 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 3 states and 55 transitions. [2024-01-27 15:19:47,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 217 flow [2024-01-27 15:19:47,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:47,936 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 102 flow [2024-01-27 15:19:47,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2024-01-27 15:19:47,937 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2024-01-27 15:19:47,937 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 102 flow [2024-01-27 15:19:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:19:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:47,938 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] [2024-01-27 15:19:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:19:47,938 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 15:19:47,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1297276284, now seen corresponding path program 1 times [2024-01-27 15:19:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:47,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978662517] [2024-01-27 15:19:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:48,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:48,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978662517] [2024-01-27 15:19:48,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978662517] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812866969] [2024-01-27 15:19:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:48,116 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 15:19:48,144 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 15:19:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:48,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:48,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:48,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812866969] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:48,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:48,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-01-27 15:19:48,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079551547] [2024-01-27 15:19:48,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:19:48,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:19:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:19:48,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 15:19:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:48,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:48,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:48,521 INFO L124 PetriNetUnfolderBase]: 341/515 cut-off events. [2024-01-27 15:19:48,521 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-01-27 15:19:48,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 515 events. 341/515 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1353 event pairs, 228 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 1109. Up to 503 conditions per place. [2024-01-27 15:19:48,526 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 26 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2024-01-27 15:19:48,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 220 flow [2024-01-27 15:19:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:19:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:19:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-01-27 15:19:48,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-01-27 15:19:48,530 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 102 flow. Second operand 6 states and 73 transitions. [2024-01-27 15:19:48,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 220 flow [2024-01-27 15:19:48,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:48,533 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 196 flow [2024-01-27 15:19:48,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2024-01-27 15:19:48,534 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-01-27 15:19:48,535 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 196 flow [2024-01-27 15:19:48,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 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 15:19:48,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:48,535 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:19:48,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:19:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:48,754 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 15:19:48,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1716219622, now seen corresponding path program 2 times [2024-01-27 15:19:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322556387] [2024-01-27 15:19:48,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322556387] [2024-01-27 15:19:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322556387] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853026183] [2024-01-27 15:19:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:48,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:48,972 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 15:19:48,994 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 15:19:49,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:19:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:49,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:49,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:49,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853026183] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:49,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:49,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-01-27 15:19:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172547364] [2024-01-27 15:19:49,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:19:49,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:49,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:49,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:49,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:49,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:49,373 INFO L124 PetriNetUnfolderBase]: 567/861 cut-off events. [2024-01-27 15:19:49,373 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-01-27 15:19:49,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 861 events. 567/861 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2923 event pairs, 228 based on Foata normal form. 22/725 useless extension candidates. Maximal degree in co-relation 1849. Up to 515 conditions per place. [2024-01-27 15:19:49,378 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 67 selfloop transitions, 3 changer transitions 2/73 dead transitions. [2024-01-27 15:19:49,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 423 flow [2024-01-27 15:19:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-01-27 15:19:49,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-01-27 15:19:49,379 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 196 flow. Second operand 4 states and 74 transitions. [2024-01-27 15:19:49,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 423 flow [2024-01-27 15:19:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 399 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:49,383 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 192 flow [2024-01-27 15:19:49,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-01-27 15:19:49,384 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2024-01-27 15:19:49,384 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 192 flow [2024-01-27 15:19:49,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:49,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:49,384 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:19:49,400 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 15:19:49,600 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,SelfDestructingSolverStorable3 [2024-01-27 15:19:49,600 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 15:19:49,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1266254996, now seen corresponding path program 3 times [2024-01-27 15:19:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:49,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401550734] [2024-01-27 15:19:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401550734] [2024-01-27 15:19:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401550734] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203922480] [2024-01-27 15:19:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:49,851 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 15:19:49,870 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 15:19:49,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:19:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:49,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:49,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:50,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203922480] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:50,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:50,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-01-27 15:19:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992273963] [2024-01-27 15:19:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:50,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:19:50,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:50,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:50,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:50,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:50,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:50,274 INFO L124 PetriNetUnfolderBase]: 625/943 cut-off events. [2024-01-27 15:19:50,275 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2024-01-27 15:19:50,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 943 events. 625/943 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3359 event pairs, 110 based on Foata normal form. 24/835 useless extension candidates. Maximal degree in co-relation 2399. Up to 652 conditions per place. [2024-01-27 15:19:50,280 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 61 selfloop transitions, 5 changer transitions 1/68 dead transitions. [2024-01-27 15:19:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 406 flow [2024-01-27 15:19:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-27 15:19:50,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-01-27 15:19:50,284 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 192 flow. Second operand 4 states and 65 transitions. [2024-01-27 15:19:50,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 406 flow [2024-01-27 15:19:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 395 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:50,289 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 217 flow [2024-01-27 15:19:50,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-01-27 15:19:50,291 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2024-01-27 15:19:50,291 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 217 flow [2024-01-27 15:19:50,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:50,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:50,292 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:19:50,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:19:50,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:50,507 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 15:19:50,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 707335756, now seen corresponding path program 4 times [2024-01-27 15:19:50,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:50,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578013886] [2024-01-27 15:19:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:50,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:50,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:50,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578013886] [2024-01-27 15:19:50,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578013886] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:50,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886616924] [2024-01-27 15:19:50,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:19:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:50,676 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 15:19:50,685 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 15:19:50,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:19:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:50,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:19:50,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:50,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:50,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886616924] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:50,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:50,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-01-27 15:19:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979978142] [2024-01-27 15:19:50,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:50,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:19:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:19:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:19:50,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:50,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 217 flow. Second operand has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 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 15:19:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:50,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:50,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:51,234 INFO L124 PetriNetUnfolderBase]: 625/946 cut-off events. [2024-01-27 15:19:51,234 INFO L125 PetriNetUnfolderBase]: For 969/969 co-relation queries the response was YES. [2024-01-27 15:19:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2616 conditions, 946 events. 625/946 cut-off events. For 969/969 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3102 event pairs, 418 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 2521. Up to 930 conditions per place. [2024-01-27 15:19:51,240 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2024-01-27 15:19:51,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 331 flow [2024-01-27 15:19:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:19:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:19:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-01-27 15:19:51,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2024-01-27 15:19:51,241 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 217 flow. Second operand 7 states and 74 transitions. [2024-01-27 15:19:51,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 331 flow [2024-01-27 15:19:51,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:51,244 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 282 flow [2024-01-27 15:19:51,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2024-01-27 15:19:51,245 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 20 predicate places. [2024-01-27 15:19:51,245 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 282 flow [2024-01-27 15:19:51,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 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 15:19:51,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:51,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 15:19:51,262 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 15:19:51,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:51,460 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 15:19:51,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1053441796, now seen corresponding path program 5 times [2024-01-27 15:19:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:51,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365416977] [2024-01-27 15:19:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:51,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:19:51,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:51,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365416977] [2024-01-27 15:19:51,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365416977] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:51,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:51,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:51,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378695143] [2024-01-27 15:19:51,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:51,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:51,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:51,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:51,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 15:19:51,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:51,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:52,147 INFO L124 PetriNetUnfolderBase]: 1105/1680 cut-off events. [2024-01-27 15:19:52,147 INFO L125 PetriNetUnfolderBase]: For 1334/1334 co-relation queries the response was YES. [2024-01-27 15:19:52,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1680 events. 1105/1680 cut-off events. For 1334/1334 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6967 event pairs, 406 based on Foata normal form. 20/1450 useless extension candidates. Maximal degree in co-relation 4422. Up to 979 conditions per place. [2024-01-27 15:19:52,155 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 3 changer transitions 16/98 dead transitions. [2024-01-27 15:19:52,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 98 transitions, 663 flow [2024-01-27 15:19:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-01-27 15:19:52,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-01-27 15:19:52,156 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 282 flow. Second operand 5 states and 87 transitions. [2024-01-27 15:19:52,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 98 transitions, 663 flow [2024-01-27 15:19:52,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 98 transitions, 627 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:19:52,161 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 268 flow [2024-01-27 15:19:52,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-01-27 15:19:52,162 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-01-27 15:19:52,162 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 268 flow [2024-01-27 15:19:52,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 15:19:52,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:52,162 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 15:19:52,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:19:52,163 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 15:19:52,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:52,163 INFO L85 PathProgramCache]: Analyzing trace with hash -865468068, now seen corresponding path program 6 times [2024-01-27 15:19:52,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:52,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005944240] [2024-01-27 15:19:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:52,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:52,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005944240] [2024-01-27 15:19:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005944240] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:52,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133395741] [2024-01-27 15:19:52,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:52,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:52,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:52,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:52,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:52,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:52,688 INFO L124 PetriNetUnfolderBase]: 843/1260 cut-off events. [2024-01-27 15:19:52,688 INFO L125 PetriNetUnfolderBase]: For 1819/1819 co-relation queries the response was YES. [2024-01-27 15:19:52,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 1260 events. 843/1260 cut-off events. For 1819/1819 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4682 event pairs, 352 based on Foata normal form. 48/1176 useless extension candidates. Maximal degree in co-relation 3912. Up to 885 conditions per place. [2024-01-27 15:19:52,696 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 69 selfloop transitions, 6 changer transitions 3/79 dead transitions. [2024-01-27 15:19:52,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 535 flow [2024-01-27 15:19:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-01-27 15:19:52,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-01-27 15:19:52,698 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 268 flow. Second operand 4 states and 69 transitions. [2024-01-27 15:19:52,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 535 flow [2024-01-27 15:19:52,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 518 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:52,702 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 285 flow [2024-01-27 15:19:52,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-01-27 15:19:52,703 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-01-27 15:19:52,703 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 285 flow [2024-01-27 15:19:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:19:52,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:52,704 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:19:52,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:19:52,704 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 15:19:52,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -214625937, now seen corresponding path program 1 times [2024-01-27 15:19:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:52,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074236088] [2024-01-27 15:19:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:52,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074236088] [2024-01-27 15:19:52,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074236088] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:52,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:52,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:52,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198117666] [2024-01-27 15:19:52,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:52,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:52,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:52,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:52,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:52,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:52,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:52,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:52,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:52,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:53,206 INFO L124 PetriNetUnfolderBase]: 920/1366 cut-off events. [2024-01-27 15:19:53,206 INFO L125 PetriNetUnfolderBase]: For 2353/2353 co-relation queries the response was YES. [2024-01-27 15:19:53,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 1366 events. 920/1366 cut-off events. For 2353/2353 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5155 event pairs, 293 based on Foata normal form. 14/1240 useless extension candidates. Maximal degree in co-relation 4318. Up to 763 conditions per place. [2024-01-27 15:19:53,214 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 73 selfloop transitions, 6 changer transitions 14/94 dead transitions. [2024-01-27 15:19:53,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 651 flow [2024-01-27 15:19:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-01-27 15:19:53,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-01-27 15:19:53,216 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 285 flow. Second operand 5 states and 86 transitions. [2024-01-27 15:19:53,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 651 flow [2024-01-27 15:19:53,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 611 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:53,220 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 309 flow [2024-01-27 15:19:53,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-01-27 15:19:53,221 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2024-01-27 15:19:53,221 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 309 flow [2024-01-27 15:19:53,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:53,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:53,221 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:19:53,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:19:53,222 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 15:19:53,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash 208249095, now seen corresponding path program 2 times [2024-01-27 15:19:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:53,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778594275] [2024-01-27 15:19:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778594275] [2024-01-27 15:19:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778594275] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:53,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178015616] [2024-01-27 15:19:53,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:53,481 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 15:19:53,500 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 15:19:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:19:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:53,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:53,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:53,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178015616] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:53,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-01-27 15:19:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954608868] [2024-01-27 15:19:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:19:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:53,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:54,029 INFO L124 PetriNetUnfolderBase]: 930/1371 cut-off events. [2024-01-27 15:19:54,030 INFO L125 PetriNetUnfolderBase]: For 2500/2500 co-relation queries the response was YES. [2024-01-27 15:19:54,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 1371 events. 930/1371 cut-off events. For 2500/2500 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4989 event pairs, 155 based on Foata normal form. 24/1255 useless extension candidates. Maximal degree in co-relation 4554. Up to 515 conditions per place. [2024-01-27 15:19:54,040 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 91 selfloop transitions, 9 changer transitions 3/104 dead transitions. [2024-01-27 15:19:54,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 104 transitions, 752 flow [2024-01-27 15:19:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-01-27 15:19:54,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-01-27 15:19:54,041 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 309 flow. Second operand 5 states and 83 transitions. [2024-01-27 15:19:54,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 104 transitions, 752 flow [2024-01-27 15:19:54,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 737 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:54,049 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 362 flow [2024-01-27 15:19:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-01-27 15:19:54,050 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2024-01-27 15:19:54,050 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 362 flow [2024-01-27 15:19:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:54,051 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:19:54,067 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 15:19:54,266 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,SelfDestructingSolverStorable9 [2024-01-27 15:19:54,267 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 15:19:54,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -36227667, now seen corresponding path program 3 times [2024-01-27 15:19:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:54,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967474575] [2024-01-27 15:19:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:54,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:54,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967474575] [2024-01-27 15:19:54,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967474575] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:54,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243821834] [2024-01-27 15:19:54,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:54,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:54,494 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 15:19:54,511 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 15:19:54,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:19:54,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:54,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:54,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:54,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:54,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243821834] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:54,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:54,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-01-27 15:19:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521191703] [2024-01-27 15:19:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:54,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:19:54,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:54,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:54,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:54,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:54,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:55,150 INFO L124 PetriNetUnfolderBase]: 988/1453 cut-off events. [2024-01-27 15:19:55,151 INFO L125 PetriNetUnfolderBase]: For 3190/3190 co-relation queries the response was YES. [2024-01-27 15:19:55,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5089 conditions, 1453 events. 988/1453 cut-off events. For 3190/3190 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5439 event pairs, 301 based on Foata normal form. 24/1333 useless extension candidates. Maximal degree in co-relation 4984. Up to 811 conditions per place. [2024-01-27 15:19:55,161 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 83 selfloop transitions, 10 changer transitions 1/95 dead transitions. [2024-01-27 15:19:55,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 695 flow [2024-01-27 15:19:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:19:55,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-01-27 15:19:55,162 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 362 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:19:55,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 695 flow [2024-01-27 15:19:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 686 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:55,169 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 384 flow [2024-01-27 15:19:55,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2024-01-27 15:19:55,170 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2024-01-27 15:19:55,170 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 384 flow [2024-01-27 15:19:55,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:55,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:55,170 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:19:55,189 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 15:19:55,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:55,385 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 15:19:55,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1473161755, now seen corresponding path program 4 times [2024-01-27 15:19:55,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:55,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693263132] [2024-01-27 15:19:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:55,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:55,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693263132] [2024-01-27 15:19:55,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693263132] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:55,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:55,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772645933] [2024-01-27 15:19:55,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:55,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:55,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:55,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:55,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:55,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:55,938 INFO L124 PetriNetUnfolderBase]: 974/1439 cut-off events. [2024-01-27 15:19:55,938 INFO L125 PetriNetUnfolderBase]: For 3819/3819 co-relation queries the response was YES. [2024-01-27 15:19:55,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5289 conditions, 1439 events. 974/1439 cut-off events. For 3819/3819 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5335 event pairs, 315 based on Foata normal form. 14/1309 useless extension candidates. Maximal degree in co-relation 5183. Up to 968 conditions per place. [2024-01-27 15:19:55,947 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 16/101 dead transitions. [2024-01-27 15:19:55,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 782 flow [2024-01-27 15:19:55,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-01-27 15:19:55,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-01-27 15:19:55,949 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 384 flow. Second operand 5 states and 83 transitions. [2024-01-27 15:19:55,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 782 flow [2024-01-27 15:19:55,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 754 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:55,956 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 436 flow [2024-01-27 15:19:55,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=436, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-01-27 15:19:55,956 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2024-01-27 15:19:55,956 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 436 flow [2024-01-27 15:19:55,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:55,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:55,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:19:55,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:19:55,957 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 15:19:55,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1593966465, now seen corresponding path program 5 times [2024-01-27 15:19:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:55,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370335752] [2024-01-27 15:19:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:55,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:56,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:56,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370335752] [2024-01-27 15:19:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370335752] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:56,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:56,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:56,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570803288] [2024-01-27 15:19:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:56,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:56,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:56,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:56,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 436 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:56,455 INFO L124 PetriNetUnfolderBase]: 864/1269 cut-off events. [2024-01-27 15:19:56,455 INFO L125 PetriNetUnfolderBase]: For 3735/3735 co-relation queries the response was YES. [2024-01-27 15:19:56,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 1269 events. 864/1269 cut-off events. For 3735/3735 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4519 event pairs, 259 based on Foata normal form. 24/1157 useless extension candidates. Maximal degree in co-relation 4619. Up to 806 conditions per place. [2024-01-27 15:19:56,463 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 9 changer transitions 4/99 dead transitions. [2024-01-27 15:19:56,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 777 flow [2024-01-27 15:19:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-01-27 15:19:56,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-01-27 15:19:56,465 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 436 flow. Second operand 5 states and 81 transitions. [2024-01-27 15:19:56,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 777 flow [2024-01-27 15:19:56,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 759 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:56,473 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 434 flow [2024-01-27 15:19:56,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-01-27 15:19:56,474 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2024-01-27 15:19:56,474 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 434 flow [2024-01-27 15:19:56,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:19:56,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:56,474 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:19:56,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:19:56,475 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 15:19:56,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -617366413, now seen corresponding path program 1 times [2024-01-27 15:19:56,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:56,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471936228] [2024-01-27 15:19:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:56,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:19:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471936228] [2024-01-27 15:19:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471936228] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383784538] [2024-01-27 15:19:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:57,534 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 15:19:57,551 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 15:19:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:57,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:19:57,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:57,956 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:19:57,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:19:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:19:58,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:58,454 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:19:58,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:19:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:19:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383784538] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:58,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:58,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2024-01-27 15:19:58,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173677818] [2024-01-27 15:19:58,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:58,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:19:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:19:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:19:58,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:58,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 434 flow. Second operand has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:58,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:59,992 INFO L124 PetriNetUnfolderBase]: 1997/2916 cut-off events. [2024-01-27 15:19:59,993 INFO L125 PetriNetUnfolderBase]: For 6845/6845 co-relation queries the response was YES. [2024-01-27 15:20:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10411 conditions, 2916 events. 1997/2916 cut-off events. For 6845/6845 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12849 event pairs, 176 based on Foata normal form. 1/2499 useless extension candidates. Maximal degree in co-relation 10302. Up to 928 conditions per place. [2024-01-27 15:20:00,024 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 65 changer transitions 9/232 dead transitions. [2024-01-27 15:20:00,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 232 transitions, 1809 flow [2024-01-27 15:20:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:20:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:20:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 232 transitions. [2024-01-27 15:20:00,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41354723707664887 [2024-01-27 15:20:00,026 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 434 flow. Second operand 17 states and 232 transitions. [2024-01-27 15:20:00,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 232 transitions, 1809 flow [2024-01-27 15:20:00,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 232 transitions, 1657 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:00,044 INFO L231 Difference]: Finished difference. Result has 88 places, 124 transitions, 1078 flow [2024-01-27 15:20:00,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1078, PETRI_PLACES=88, PETRI_TRANSITIONS=124} [2024-01-27 15:20:00,045 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2024-01-27 15:20:00,045 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 124 transitions, 1078 flow [2024-01-27 15:20:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.444444444444445) internal successors, (174), 27 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:00,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:00,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:00,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:00,260 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 15:20:00,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1347741755, now seen corresponding path program 2 times [2024-01-27 15:20:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:00,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235983669] [2024-01-27 15:20:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235983669] [2024-01-27 15:20:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235983669] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235398359] [2024-01-27 15:20:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:01,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:01,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:20:01,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:01,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:01,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:20:01,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:01,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:01,932 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 59 treesize of output 75 [2024-01-27 15:20:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:02,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:02,421 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:02,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:02,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235398359] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:02,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:02,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-01-27 15:20:02,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488040742] [2024-01-27 15:20:02,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:02,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:20:02,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:20:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:20:02,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:02,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 124 transitions, 1078 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:02,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:02,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:02,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:04,537 INFO L124 PetriNetUnfolderBase]: 2325/3396 cut-off events. [2024-01-27 15:20:04,537 INFO L125 PetriNetUnfolderBase]: For 11711/11711 co-relation queries the response was YES. [2024-01-27 15:20:04,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 3396 events. 2325/3396 cut-off events. For 11711/11711 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15390 event pairs, 248 based on Foata normal form. 1/3397 useless extension candidates. Maximal degree in co-relation 13674. Up to 1135 conditions per place. [2024-01-27 15:20:04,560 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 160 selfloop transitions, 81 changer transitions 46/288 dead transitions. [2024-01-27 15:20:04,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 288 transitions, 2445 flow [2024-01-27 15:20:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:20:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:20:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2024-01-27 15:20:04,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2024-01-27 15:20:04,562 INFO L175 Difference]: Start difference. First operand has 88 places, 124 transitions, 1078 flow. Second operand 21 states and 283 transitions. [2024-01-27 15:20:04,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 288 transitions, 2445 flow [2024-01-27 15:20:04,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 288 transitions, 2402 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-01-27 15:20:04,599 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1461 flow [2024-01-27 15:20:04,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1461, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2024-01-27 15:20:04,600 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 81 predicate places. [2024-01-27 15:20:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1461 flow [2024-01-27 15:20:04,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:04,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:04,600 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:04,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:20:04,801 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 15:20:04,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1280045217, now seen corresponding path program 3 times [2024-01-27 15:20:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:04,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251633119] [2024-01-27 15:20:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251633119] [2024-01-27 15:20:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251633119] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766344128] [2024-01-27 15:20:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:05,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:05,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:05,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:05,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:20:05,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:20:05,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:05,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:20:05,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:06,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:06,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2024-01-27 15:20:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:06,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:06,553 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:06,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:06,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766344128] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:06,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:06,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2024-01-27 15:20:06,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097247979] [2024-01-27 15:20:06,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:20:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:20:06,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:20:06,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:06,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1461 flow. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 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 15:20:06,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:06,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:06,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:08,167 INFO L124 PetriNetUnfolderBase]: 2080/3047 cut-off events. [2024-01-27 15:20:08,168 INFO L125 PetriNetUnfolderBase]: For 22769/22769 co-relation queries the response was YES. [2024-01-27 15:20:08,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16511 conditions, 3047 events. 2080/3047 cut-off events. For 22769/22769 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13536 event pairs, 341 based on Foata normal form. 1/3048 useless extension candidates. Maximal degree in co-relation 16386. Up to 1182 conditions per place. [2024-01-27 15:20:08,191 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 157 selfloop transitions, 75 changer transitions 3/236 dead transitions. [2024-01-27 15:20:08,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 236 transitions, 2434 flow [2024-01-27 15:20:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:20:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:20:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 206 transitions. [2024-01-27 15:20:08,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-01-27 15:20:08,194 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1461 flow. Second operand 16 states and 206 transitions. [2024-01-27 15:20:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 236 transitions, 2434 flow [2024-01-27 15:20:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 236 transitions, 2300 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:08,266 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1540 flow [2024-01-27 15:20:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1540, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-01-27 15:20:08,268 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2024-01-27 15:20:08,268 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1540 flow [2024-01-27 15:20:08,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 25 states have internal predecessors, (166), 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 15:20:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:08,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:08,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:20:08,469 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 15:20:08,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash 879594951, now seen corresponding path program 4 times [2024-01-27 15:20:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94723585] [2024-01-27 15:20:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:08,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:09,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94723585] [2024-01-27 15:20:09,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94723585] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:09,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704929089] [2024-01-27 15:20:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:09,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:09,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:09,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:20:09,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:09,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:09,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:20:09,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:09,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:09,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:20:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:09,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:10,172 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:10,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:10,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704929089] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:10,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:10,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2024-01-27 15:20:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749931400] [2024-01-27 15:20:10,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:10,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:20:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:20:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:20:10,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:10,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1540 flow. Second operand has 27 states, 27 states have (on average 6.296296296296297) internal successors, (170), 27 states have internal predecessors, (170), 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 15:20:10,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:10,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:10,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:12,020 INFO L124 PetriNetUnfolderBase]: 2096/3078 cut-off events. [2024-01-27 15:20:12,020 INFO L125 PetriNetUnfolderBase]: For 24422/24422 co-relation queries the response was YES. [2024-01-27 15:20:12,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17089 conditions, 3078 events. 2096/3078 cut-off events. For 24422/24422 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13700 event pairs, 327 based on Foata normal form. 1/3065 useless extension candidates. Maximal degree in co-relation 16962. Up to 1152 conditions per place. [2024-01-27 15:20:12,040 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 162 selfloop transitions, 85 changer transitions 3/251 dead transitions. [2024-01-27 15:20:12,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 2562 flow [2024-01-27 15:20:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:20:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:20:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 242 transitions. [2024-01-27 15:20:12,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38596491228070173 [2024-01-27 15:20:12,043 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1540 flow. Second operand 19 states and 242 transitions. [2024-01-27 15:20:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 2562 flow [2024-01-27 15:20:12,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 251 transitions, 2445 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-01-27 15:20:12,100 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1624 flow [2024-01-27 15:20:12,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1624, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2024-01-27 15:20:12,101 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2024-01-27 15:20:12,101 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1624 flow [2024-01-27 15:20:12,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.296296296296297) internal successors, (170), 27 states have internal predecessors, (170), 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 15:20:12,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:12,102 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:12,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:20:12,321 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 15:20:12,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1725020341, now seen corresponding path program 5 times [2024-01-27 15:20:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:12,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964723011] [2024-01-27 15:20:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:12,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:13,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964723011] [2024-01-27 15:20:13,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964723011] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760860975] [2024-01-27 15:20:13,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:13,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:13,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:13,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:20:13,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:13,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:20:13,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:13,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:13,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2024-01-27 15:20:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:13,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:14,342 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:20:14,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2024-01-27 15:20:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760860975] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:19,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:19,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 30 [2024-01-27 15:20:19,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170442250] [2024-01-27 15:20:19,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:20:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:20:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:20:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:19,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 150 transitions, 1624 flow. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 30 states have internal predecessors, (194), 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 15:20:19,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:19,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:19,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:21,261 INFO L124 PetriNetUnfolderBase]: 3202/4649 cut-off events. [2024-01-27 15:20:21,261 INFO L125 PetriNetUnfolderBase]: For 44555/44555 co-relation queries the response was YES. [2024-01-27 15:20:21,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 4649 events. 3202/4649 cut-off events. For 44555/44555 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22130 event pairs, 421 based on Foata normal form. 1/4650 useless extension candidates. Maximal degree in co-relation 26845. Up to 2704 conditions per place. [2024-01-27 15:20:21,295 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 195 selfloop transitions, 122 changer transitions 34/352 dead transitions. [2024-01-27 15:20:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 352 transitions, 3916 flow [2024-01-27 15:20:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:20:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:20:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 295 transitions. [2024-01-27 15:20:21,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38866930171277997 [2024-01-27 15:20:21,297 INFO L175 Difference]: Start difference. First operand has 126 places, 150 transitions, 1624 flow. Second operand 23 states and 295 transitions. [2024-01-27 15:20:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 352 transitions, 3916 flow [2024-01-27 15:20:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 352 transitions, 3739 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-01-27 15:20:21,435 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2721 flow [2024-01-27 15:20:21,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2721, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2024-01-27 15:20:21,435 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 111 predicate places. [2024-01-27 15:20:21,436 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2721 flow [2024-01-27 15:20:21,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 30 states have internal predecessors, (194), 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 15:20:21,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:21,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:21,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:20:21,652 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 15:20:21,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:21,652 INFO L85 PathProgramCache]: Analyzing trace with hash 393020331, now seen corresponding path program 6 times [2024-01-27 15:20:21,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:21,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174116416] [2024-01-27 15:20:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174116416] [2024-01-27 15:20:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174116416] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104168081] [2024-01-27 15:20:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:22,520 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:22,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:20:22,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:22,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:22,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:20:22,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:23,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:23,095 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 59 treesize of output 75 [2024-01-27 15:20:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:23,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:23,519 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:23,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:23,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104168081] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:23,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:23,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-01-27 15:20:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487353905] [2024-01-27 15:20:23,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:23,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:20:23,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:20:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:20:23,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:23,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2721 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:23,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:23,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:23,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:25,277 INFO L124 PetriNetUnfolderBase]: 2973/4350 cut-off events. [2024-01-27 15:20:25,277 INFO L125 PetriNetUnfolderBase]: For 83896/83896 co-relation queries the response was YES. [2024-01-27 15:20:25,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30482 conditions, 4350 events. 2973/4350 cut-off events. For 83896/83896 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20759 event pairs, 542 based on Foata normal form. 1/4351 useless extension candidates. Maximal degree in co-relation 30342. Up to 2066 conditions per place. [2024-01-27 15:20:25,320 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 218 selfloop transitions, 101 changer transitions 1/321 dead transitions. [2024-01-27 15:20:25,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 321 transitions, 4106 flow [2024-01-27 15:20:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:20:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:20:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 233 transitions. [2024-01-27 15:20:25,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39225589225589225 [2024-01-27 15:20:25,322 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2721 flow. Second operand 18 states and 233 transitions. [2024-01-27 15:20:25,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 321 transitions, 4106 flow [2024-01-27 15:20:25,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 321 transitions, 3765 flow, removed 135 selfloop flow, removed 9 redundant places. [2024-01-27 15:20:25,619 INFO L231 Difference]: Finished difference. Result has 155 places, 222 transitions, 2834 flow [2024-01-27 15:20:25,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2834, PETRI_PLACES=155, PETRI_TRANSITIONS=222} [2024-01-27 15:20:25,619 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 122 predicate places. [2024-01-27 15:20:25,619 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 222 transitions, 2834 flow [2024-01-27 15:20:25,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:25,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:25,620 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:25,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:25,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:25,827 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 15:20:25,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1477894321, now seen corresponding path program 7 times [2024-01-27 15:20:25,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:25,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973242687] [2024-01-27 15:20:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:25,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:26,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973242687] [2024-01-27 15:20:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973242687] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208869184] [2024-01-27 15:20:26,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:20:26,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:26,692 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:26,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:20:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:26,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:20:26,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:27,068 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:27,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:20:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:27,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:27,396 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:27,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208869184] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:27,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:27,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 28 [2024-01-27 15:20:27,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180026711] [2024-01-27 15:20:27,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:27,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:20:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:20:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:20:27,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:27,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 222 transitions, 2834 flow. Second operand has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 states have internal predecessors, (177), 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 15:20:27,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:27,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:27,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:29,477 INFO L124 PetriNetUnfolderBase]: 3237/4741 cut-off events. [2024-01-27 15:20:29,477 INFO L125 PetriNetUnfolderBase]: For 92729/92729 co-relation queries the response was YES. [2024-01-27 15:20:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33033 conditions, 4741 events. 3237/4741 cut-off events. For 92729/92729 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23175 event pairs, 379 based on Foata normal form. 1/4722 useless extension candidates. Maximal degree in co-relation 32892. Up to 1740 conditions per place. [2024-01-27 15:20:29,515 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 233 selfloop transitions, 126 changer transitions 8/368 dead transitions. [2024-01-27 15:20:29,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 368 transitions, 4642 flow [2024-01-27 15:20:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:20:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:20:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 298 transitions. [2024-01-27 15:20:29,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926218708827404 [2024-01-27 15:20:29,518 INFO L175 Difference]: Start difference. First operand has 155 places, 222 transitions, 2834 flow. Second operand 23 states and 298 transitions. [2024-01-27 15:20:29,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 368 transitions, 4642 flow [2024-01-27 15:20:29,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 368 transitions, 4368 flow, removed 54 selfloop flow, removed 14 redundant places. [2024-01-27 15:20:29,745 INFO L231 Difference]: Finished difference. Result has 168 places, 233 transitions, 3090 flow [2024-01-27 15:20:29,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3090, PETRI_PLACES=168, PETRI_TRANSITIONS=233} [2024-01-27 15:20:29,746 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2024-01-27 15:20:29,746 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 233 transitions, 3090 flow [2024-01-27 15:20:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.321428571428571) internal successors, (177), 28 states have internal predecessors, (177), 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 15:20:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:29,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:29,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-01-27 15:20:29,960 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 15:20:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1038461781, now seen corresponding path program 8 times [2024-01-27 15:20:29,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:29,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980641314] [2024-01-27 15:20:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980641314] [2024-01-27 15:20:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980641314] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943437439] [2024-01-27 15:20:30,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:30,796 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:30,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:20:31,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:31,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:20:31,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:31,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:31,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 120 [2024-01-27 15:20:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:31,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:31,933 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:31,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943437439] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:32,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:32,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 29 [2024-01-27 15:20:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939994954] [2024-01-27 15:20:32,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:32,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:20:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:32,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:20:32,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:20:32,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:32,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 233 transitions, 3090 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:32,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:32,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:32,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:33,614 INFO L124 PetriNetUnfolderBase]: 3250/4774 cut-off events. [2024-01-27 15:20:33,615 INFO L125 PetriNetUnfolderBase]: For 95997/95997 co-relation queries the response was YES. [2024-01-27 15:20:33,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33670 conditions, 4774 events. 3250/4774 cut-off events. For 95997/95997 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23377 event pairs, 635 based on Foata normal form. 2/4756 useless extension candidates. Maximal degree in co-relation 33526. Up to 2444 conditions per place. [2024-01-27 15:20:33,673 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 227 selfloop transitions, 101 changer transitions 2/331 dead transitions. [2024-01-27 15:20:33,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 331 transitions, 4390 flow [2024-01-27 15:20:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:20:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:20:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 218 transitions. [2024-01-27 15:20:33,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38859180035650626 [2024-01-27 15:20:33,675 INFO L175 Difference]: Start difference. First operand has 168 places, 233 transitions, 3090 flow. Second operand 17 states and 218 transitions. [2024-01-27 15:20:33,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 331 transitions, 4390 flow [2024-01-27 15:20:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 331 transitions, 4172 flow, removed 34 selfloop flow, removed 17 redundant places. [2024-01-27 15:20:33,879 INFO L231 Difference]: Finished difference. Result has 169 places, 239 transitions, 3189 flow [2024-01-27 15:20:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3189, PETRI_PLACES=169, PETRI_TRANSITIONS=239} [2024-01-27 15:20:33,880 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 136 predicate places. [2024-01-27 15:20:33,880 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 239 transitions, 3189 flow [2024-01-27 15:20:33,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 15:20:33,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:33,880 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:33,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:34,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:34,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 15:20:34,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1255708307, now seen corresponding path program 9 times [2024-01-27 15:20:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:34,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972297639] [2024-01-27 15:20:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:34,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972297639] [2024-01-27 15:20:34,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972297639] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:34,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139515752] [2024-01-27 15:20:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:34,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:34,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:34,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:20:35,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:20:35,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:35,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:20:35,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:35,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:35,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2024-01-27 15:20:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:35,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:35,724 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2024-01-27 15:20:35,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2024-01-27 15:20:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139515752] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:35,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 23 [2024-01-27 15:20:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637349839] [2024-01-27 15:20:35,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:20:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:20:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:20:35,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:35,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 239 transitions, 3189 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:35,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:35,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:35,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:37,381 INFO L124 PetriNetUnfolderBase]: 3250/4772 cut-off events. [2024-01-27 15:20:37,382 INFO L125 PetriNetUnfolderBase]: For 96564/96564 co-relation queries the response was YES. [2024-01-27 15:20:37,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 4772 events. 3250/4772 cut-off events. For 96564/96564 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23358 event pairs, 623 based on Foata normal form. 1/4753 useless extension candidates. Maximal degree in co-relation 34096. Up to 2425 conditions per place. [2024-01-27 15:20:37,418 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 228 selfloop transitions, 108 changer transitions 1/338 dead transitions. [2024-01-27 15:20:37,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 338 transitions, 4435 flow [2024-01-27 15:20:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:20:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:20:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 239 transitions. [2024-01-27 15:20:37,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38118022328548645 [2024-01-27 15:20:37,420 INFO L175 Difference]: Start difference. First operand has 169 places, 239 transitions, 3189 flow. Second operand 19 states and 239 transitions. [2024-01-27 15:20:37,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 338 transitions, 4435 flow [2024-01-27 15:20:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 338 transitions, 4228 flow, removed 23 selfloop flow, removed 14 redundant places. [2024-01-27 15:20:37,581 INFO L231 Difference]: Finished difference. Result has 174 places, 240 transitions, 3229 flow [2024-01-27 15:20:37,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3229, PETRI_PLACES=174, PETRI_TRANSITIONS=240} [2024-01-27 15:20:37,581 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 141 predicate places. [2024-01-27 15:20:37,581 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 240 transitions, 3229 flow [2024-01-27 15:20:37,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:20:37,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:37,582 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:37,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:37,782 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 15:20:37,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash -226946819, now seen corresponding path program 10 times [2024-01-27 15:20:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605362842] [2024-01-27 15:20:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:37,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:38,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:38,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605362842] [2024-01-27 15:20:38,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605362842] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:38,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946543338] [2024-01-27 15:20:38,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:38,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:38,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:38,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:20:38,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:38,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:38,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:20:38,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:38,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:38,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:20:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:38,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:39,290 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:20:39,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:20:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946543338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:46,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:46,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2024-01-27 15:20:46,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223998648] [2024-01-27 15:20:46,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:46,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:20:46,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:20:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:20:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 240 transitions, 3229 flow. Second operand has 27 states, 27 states have (on average 6.333333333333333) internal successors, (171), 27 states have internal predecessors, (171), 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 15:20:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:46,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:46,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:47,995 INFO L124 PetriNetUnfolderBase]: 3808/5640 cut-off events. [2024-01-27 15:20:47,995 INFO L125 PetriNetUnfolderBase]: For 118963/118963 co-relation queries the response was YES. [2024-01-27 15:20:48,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40634 conditions, 5640 events. 3808/5640 cut-off events. For 118963/118963 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28948 event pairs, 853 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 40489. Up to 4182 conditions per place. [2024-01-27 15:20:48,037 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 273 selfloop transitions, 110 changer transitions 2/386 dead transitions. [2024-01-27 15:20:48,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 386 transitions, 5436 flow [2024-01-27 15:20:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:20:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:20:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 247 transitions. [2024-01-27 15:20:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37424242424242427 [2024-01-27 15:20:48,039 INFO L175 Difference]: Start difference. First operand has 174 places, 240 transitions, 3229 flow. Second operand 20 states and 247 transitions. [2024-01-27 15:20:48,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 386 transitions, 5436 flow [2024-01-27 15:20:48,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 386 transitions, 5223 flow, removed 6 selfloop flow, removed 16 redundant places. [2024-01-27 15:20:48,230 INFO L231 Difference]: Finished difference. Result has 183 places, 282 transitions, 3974 flow [2024-01-27 15:20:48,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3974, PETRI_PLACES=183, PETRI_TRANSITIONS=282} [2024-01-27 15:20:48,231 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 150 predicate places. [2024-01-27 15:20:48,231 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 282 transitions, 3974 flow [2024-01-27 15:20:48,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.333333333333333) internal successors, (171), 27 states have internal predecessors, (171), 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 15:20:48,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:48,231 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:48,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:48,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:20:48,432 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 15:20:48,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -255465847, now seen corresponding path program 11 times [2024-01-27 15:20:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:48,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208282649] [2024-01-27 15:20:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-01-27 15:20:49,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208282649] [2024-01-27 15:20:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208282649] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:49,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233854681] [2024-01-27 15:20:49,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:49,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:49,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:49,800 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:49,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:20:50,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:50,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:50,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:20:50,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:50,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:50,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2024-01-27 15:20:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:50,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:50,956 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:20:50,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:20:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:55,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233854681] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:55,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:55,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 9] total 37 [2024-01-27 15:20:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196853174] [2024-01-27 15:20:55,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-01-27 15:20:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-01-27 15:20:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2024-01-27 15:20:55,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:55,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 282 transitions, 3974 flow. Second operand has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 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 15:20:55,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:55,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:55,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:57,631 INFO L124 PetriNetUnfolderBase]: 4690/6986 cut-off events. [2024-01-27 15:20:57,632 INFO L125 PetriNetUnfolderBase]: For 162366/162366 co-relation queries the response was YES. [2024-01-27 15:20:57,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53042 conditions, 6986 events. 4690/6986 cut-off events. For 162366/162366 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 37783 event pairs, 942 based on Foata normal form. 2/6968 useless extension candidates. Maximal degree in co-relation 52891. Up to 4872 conditions per place. [2024-01-27 15:20:57,686 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 292 selfloop transitions, 140 changer transitions 2/435 dead transitions. [2024-01-27 15:20:57,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 435 transitions, 6461 flow [2024-01-27 15:20:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:20:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:20:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 287 transitions. [2024-01-27 15:20:57,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3221099887766554 [2024-01-27 15:20:57,689 INFO L175 Difference]: Start difference. First operand has 183 places, 282 transitions, 3974 flow. Second operand 27 states and 287 transitions. [2024-01-27 15:20:57,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 435 transitions, 6461 flow [2024-01-27 15:20:58,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 435 transitions, 6328 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-01-27 15:20:58,151 INFO L231 Difference]: Finished difference. Result has 208 places, 320 transitions, 4808 flow [2024-01-27 15:20:58,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4808, PETRI_PLACES=208, PETRI_TRANSITIONS=320} [2024-01-27 15:20:58,151 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 175 predicate places. [2024-01-27 15:20:58,151 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 320 transitions, 4808 flow [2024-01-27 15:20:58,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 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 15:20:58,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:58,152 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:20:58,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:20:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:58,352 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 15:20:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:58,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1191923303, now seen corresponding path program 12 times [2024-01-27 15:20:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:58,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73781455] [2024-01-27 15:20:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:59,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:59,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73781455] [2024-01-27 15:20:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73781455] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:59,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593337835] [2024-01-27 15:20:59,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:20:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:59,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:20:59,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:20:59,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:20:59,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:59,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:20:59,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:59,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:20:59,536 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 59 treesize of output 75 [2024-01-27 15:20:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:20:59,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:59,991 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:20:59,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:21:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:04,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593337835] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:04,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:04,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2024-01-27 15:21:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920620796] [2024-01-27 15:21:04,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:21:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:21:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:21:04,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:04,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 320 transitions, 4808 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 15:21:04,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:04,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:04,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:06,640 INFO L124 PetriNetUnfolderBase]: 4900/7313 cut-off events. [2024-01-27 15:21:06,640 INFO L125 PetriNetUnfolderBase]: For 178755/178755 co-relation queries the response was YES. [2024-01-27 15:21:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58105 conditions, 7313 events. 4900/7313 cut-off events. For 178755/178755 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39984 event pairs, 1143 based on Foata normal form. 3/7296 useless extension candidates. Maximal degree in co-relation 57939. Up to 6112 conditions per place. [2024-01-27 15:21:06,706 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 280 selfloop transitions, 135 changer transitions 3/419 dead transitions. [2024-01-27 15:21:06,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 419 transitions, 6502 flow [2024-01-27 15:21:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:21:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:21:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 215 transitions. [2024-01-27 15:21:06,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2024-01-27 15:21:06,708 INFO L175 Difference]: Start difference. First operand has 208 places, 320 transitions, 4808 flow. Second operand 18 states and 215 transitions. [2024-01-27 15:21:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 419 transitions, 6502 flow [2024-01-27 15:21:07,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 419 transitions, 6278 flow, removed 53 selfloop flow, removed 13 redundant places. [2024-01-27 15:21:07,202 INFO L231 Difference]: Finished difference. Result has 217 places, 345 transitions, 5275 flow [2024-01-27 15:21:07,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5275, PETRI_PLACES=217, PETRI_TRANSITIONS=345} [2024-01-27 15:21:07,203 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 184 predicate places. [2024-01-27 15:21:07,203 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 345 transitions, 5275 flow [2024-01-27 15:21:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 15:21:07,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:07,203 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:07,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:07,404 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 15:21:07,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1179575463, now seen corresponding path program 13 times [2024-01-27 15:21:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152897701] [2024-01-27 15:21:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:08,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152897701] [2024-01-27 15:21:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152897701] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11784525] [2024-01-27 15:21:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:08,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:08,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:21:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:08,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:21:08,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:08,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:08,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:21:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:08,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:08,902 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:21:08,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:21:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:12,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11784525] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:12,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:12,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2024-01-27 15:21:12,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502962536] [2024-01-27 15:21:12,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:12,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:21:12,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:12,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 345 transitions, 5275 flow. Second operand has 27 states, 27 states have (on average 6.37037037037037) internal successors, (172), 27 states have internal predecessors, (172), 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 15:21:12,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:12,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:12,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:15,227 INFO L124 PetriNetUnfolderBase]: 4992/7455 cut-off events. [2024-01-27 15:21:15,228 INFO L125 PetriNetUnfolderBase]: For 189137/189137 co-relation queries the response was YES. [2024-01-27 15:21:15,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60944 conditions, 7455 events. 4992/7455 cut-off events. For 189137/189137 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40860 event pairs, 1151 based on Foata normal form. 2/7437 useless extension candidates. Maximal degree in co-relation 60793. Up to 5975 conditions per place. [2024-01-27 15:21:15,314 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 286 selfloop transitions, 139 changer transitions 2/428 dead transitions. [2024-01-27 15:21:15,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 428 transitions, 6914 flow [2024-01-27 15:21:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:21:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:21:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2024-01-27 15:21:15,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36541889483065954 [2024-01-27 15:21:15,315 INFO L175 Difference]: Start difference. First operand has 217 places, 345 transitions, 5275 flow. Second operand 17 states and 205 transitions. [2024-01-27 15:21:15,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 428 transitions, 6914 flow [2024-01-27 15:21:16,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 428 transitions, 6697 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:16,011 INFO L231 Difference]: Finished difference. Result has 224 places, 355 transitions, 5599 flow [2024-01-27 15:21:16,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5599, PETRI_PLACES=224, PETRI_TRANSITIONS=355} [2024-01-27 15:21:16,011 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 191 predicate places. [2024-01-27 15:21:16,011 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 355 transitions, 5599 flow [2024-01-27 15:21:16,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.37037037037037) internal successors, (172), 27 states have internal predecessors, (172), 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 15:21:16,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:16,012 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:16,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:16,212 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 15:21:16,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2069881113, now seen corresponding path program 14 times [2024-01-27 15:21:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249072815] [2024-01-27 15:21:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:17,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249072815] [2024-01-27 15:21:17,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249072815] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513122923] [2024-01-27 15:21:17,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:17,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:17,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:17,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:17,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:21:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:17,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:21:17,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:17,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:17,526 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 59 treesize of output 75 [2024-01-27 15:21:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:17,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:17,964 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:21:17,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:21:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:19,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513122923] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:19,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:19,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 28 [2024-01-27 15:21:19,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599990601] [2024-01-27 15:21:19,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:19,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:21:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:21:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:21:19,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:19,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 355 transitions, 5599 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 15:21:19,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:19,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:22,081 INFO L124 PetriNetUnfolderBase]: 5114/7657 cut-off events. [2024-01-27 15:21:22,082 INFO L125 PetriNetUnfolderBase]: For 220659/220659 co-relation queries the response was YES. [2024-01-27 15:21:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64720 conditions, 7657 events. 5114/7657 cut-off events. For 220659/220659 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 42503 event pairs, 1231 based on Foata normal form. 4/7613 useless extension candidates. Maximal degree in co-relation 64567. Up to 6497 conditions per place. [2024-01-27 15:21:22,150 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 313 selfloop transitions, 124 changer transitions 3/441 dead transitions. [2024-01-27 15:21:22,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 441 transitions, 7274 flow [2024-01-27 15:21:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-27 15:21:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-27 15:21:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 212 transitions. [2024-01-27 15:21:22,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569023569023569 [2024-01-27 15:21:22,153 INFO L175 Difference]: Start difference. First operand has 224 places, 355 transitions, 5599 flow. Second operand 18 states and 212 transitions. [2024-01-27 15:21:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 441 transitions, 7274 flow [2024-01-27 15:21:22,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 441 transitions, 6980 flow, removed 69 selfloop flow, removed 12 redundant places. [2024-01-27 15:21:22,824 INFO L231 Difference]: Finished difference. Result has 233 places, 368 transitions, 5825 flow [2024-01-27 15:21:22,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5307, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5825, PETRI_PLACES=233, PETRI_TRANSITIONS=368} [2024-01-27 15:21:22,825 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 200 predicate places. [2024-01-27 15:21:22,825 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 368 transitions, 5825 flow [2024-01-27 15:21:22,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 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 15:21:22,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:22,826 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:22,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:21:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:21:23,028 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 15:21:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -281255383, now seen corresponding path program 15 times [2024-01-27 15:21:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598908999] [2024-01-27 15:21:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598908999] [2024-01-27 15:21:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598908999] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175233910] [2024-01-27 15:21:23,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:23,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:23,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:23,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:21:23,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:21:23,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:23,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-27 15:21:23,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:24,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:24,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2024-01-27 15:21:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:24,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:24,773 INFO L349 Elim1Store]: treesize reduction 12, result has 94.1 percent of original size [2024-01-27 15:21:24,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 208 [2024-01-27 15:21:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175233910] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:30,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2024-01-27 15:21:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551241100] [2024-01-27 15:21:30,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:30,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:21:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:21:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:21:30,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:30,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 368 transitions, 5825 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 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 15:21:30,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:30,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:30,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:32,718 INFO L124 PetriNetUnfolderBase]: 5310/7972 cut-off events. [2024-01-27 15:21:32,718 INFO L125 PetriNetUnfolderBase]: For 243475/243475 co-relation queries the response was YES. [2024-01-27 15:21:32,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69362 conditions, 7972 events. 5310/7972 cut-off events. For 243475/243475 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 44663 event pairs, 1223 based on Foata normal form. 3/7927 useless extension candidates. Maximal degree in co-relation 69205. Up to 6516 conditions per place. [2024-01-27 15:21:32,787 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 308 selfloop transitions, 151 changer transitions 6/466 dead transitions. [2024-01-27 15:21:32,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 466 transitions, 7805 flow [2024-01-27 15:21:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:21:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:21:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 241 transitions. [2024-01-27 15:21:32,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3477633477633478 [2024-01-27 15:21:32,788 INFO L175 Difference]: Start difference. First operand has 233 places, 368 transitions, 5825 flow. Second operand 21 states and 241 transitions. [2024-01-27 15:21:32,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 466 transitions, 7805 flow [2024-01-27 15:21:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 466 transitions, 7632 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-01-27 15:21:33,496 INFO L231 Difference]: Finished difference. Result has 246 places, 383 transitions, 6357 flow [2024-01-27 15:21:33,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6357, PETRI_PLACES=246, PETRI_TRANSITIONS=383} [2024-01-27 15:21:33,497 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 213 predicate places. [2024-01-27 15:21:33,497 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 383 transitions, 6357 flow [2024-01-27 15:21:33,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 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 15:21:33,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:33,498 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:33,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-27 15:21:33,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:21:33,703 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 15:21:33,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash -517220953, now seen corresponding path program 16 times [2024-01-27 15:21:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:33,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397528732] [2024-01-27 15:21:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397528732] [2024-01-27 15:21:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397528732] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835438878] [2024-01-27 15:21:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:21:34,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:34,441 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:34,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:21:34,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:21:34,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:34,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:21:34,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:34,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:34,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:21:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:34,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:39,315 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2024-01-27 15:21:39,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2024-01-27 15:21:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:44,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835438878] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:44,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:44,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 27 [2024-01-27 15:21:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480332401] [2024-01-27 15:21:44,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:21:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:21:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2024-01-27 15:21:44,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:44,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 383 transitions, 6357 flow. Second operand has 27 states, 27 states have (on average 6.37037037037037) internal successors, (172), 27 states have internal predecessors, (172), 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 15:21:44,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:44,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:44,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:48,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:21:52,345 INFO L124 PetriNetUnfolderBase]: 5346/8051 cut-off events. [2024-01-27 15:21:52,345 INFO L125 PetriNetUnfolderBase]: For 265475/265475 co-relation queries the response was YES. [2024-01-27 15:21:52,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71981 conditions, 8051 events. 5346/8051 cut-off events. For 265475/265475 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45379 event pairs, 1309 based on Foata normal form. 3/8034 useless extension candidates. Maximal degree in co-relation 71820. Up to 6608 conditions per place. [2024-01-27 15:21:52,420 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 332 selfloop transitions, 131 changer transitions 2/466 dead transitions. [2024-01-27 15:21:52,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 466 transitions, 8113 flow [2024-01-27 15:21:52,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:21:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:21:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 201 transitions. [2024-01-27 15:21:52,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582887700534759 [2024-01-27 15:21:52,422 INFO L175 Difference]: Start difference. First operand has 246 places, 383 transitions, 6357 flow. Second operand 17 states and 201 transitions. [2024-01-27 15:21:52,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 466 transitions, 8113 flow [2024-01-27 15:21:53,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 466 transitions, 7845 flow, removed 57 selfloop flow, removed 14 redundant places. [2024-01-27 15:21:53,263 INFO L231 Difference]: Finished difference. Result has 251 places, 394 transitions, 6624 flow [2024-01-27 15:21:53,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6624, PETRI_PLACES=251, PETRI_TRANSITIONS=394} [2024-01-27 15:21:53,264 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 218 predicate places. [2024-01-27 15:21:53,264 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 394 transitions, 6624 flow [2024-01-27 15:21:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.37037037037037) internal successors, (172), 27 states have internal predecessors, (172), 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 15:21:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:53,265 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:21:53,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-27 15:21:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:21:53,467 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 15:21:53,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:53,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2110841421, now seen corresponding path program 17 times [2024-01-27 15:21:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625347766] [2024-01-27 15:21:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:53,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:54,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625347766] [2024-01-27 15:21:54,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625347766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:54,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4235572] [2024-01-27 15:21:54,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:21:54,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:54,286 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:21:54,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:21:54,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:21:54,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:54,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:21:54,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:55,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:55,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2024-01-27 15:21:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:21:55,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:55,726 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2024-01-27 15:21:55,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2024-01-27 15:22:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4235572] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:22,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 30 [2024-01-27 15:22:22,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094732991] [2024-01-27 15:22:22,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:22:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:22:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:22:22,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:22,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 394 transitions, 6624 flow. Second operand has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 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 15:22:22,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:22,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:22,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:25,195 INFO L124 PetriNetUnfolderBase]: 5498/8292 cut-off events. [2024-01-27 15:22:25,195 INFO L125 PetriNetUnfolderBase]: For 276852/276852 co-relation queries the response was YES. [2024-01-27 15:22:25,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75436 conditions, 8292 events. 5498/8292 cut-off events. For 276852/276852 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 47164 event pairs, 1292 based on Foata normal form. 3/8275 useless extension candidates. Maximal degree in co-relation 75272. Up to 7127 conditions per place. [2024-01-27 15:22:25,310 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 342 selfloop transitions, 121 changer transitions 2/466 dead transitions. [2024-01-27 15:22:25,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 466 transitions, 8308 flow [2024-01-27 15:22:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:22:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:22:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 184 transitions. [2024-01-27 15:22:25,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-01-27 15:22:25,312 INFO L175 Difference]: Start difference. First operand has 251 places, 394 transitions, 6624 flow. Second operand 16 states and 184 transitions. [2024-01-27 15:22:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 466 transitions, 8308 flow [2024-01-27 15:22:26,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 466 transitions, 8139 flow, removed 27 selfloop flow, removed 12 redundant places. [2024-01-27 15:22:26,425 INFO L231 Difference]: Finished difference. Result has 259 places, 409 transitions, 7065 flow [2024-01-27 15:22:26,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6455, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7065, PETRI_PLACES=259, PETRI_TRANSITIONS=409} [2024-01-27 15:22:26,426 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 226 predicate places. [2024-01-27 15:22:26,426 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 409 transitions, 7065 flow [2024-01-27 15:22:26,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.5) internal successors, (195), 30 states have internal predecessors, (195), 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 15:22:26,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:26,427 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:26,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-27 15:22:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:26,627 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 15:22:26,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -469153175, now seen corresponding path program 18 times [2024-01-27 15:22:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723886532] [2024-01-27 15:22:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:27,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:27,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723886532] [2024-01-27 15:22:27,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723886532] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444083079] [2024-01-27 15:22:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:22:27,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:27,443 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:27,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:22:27,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:22:27,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:27,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:22:27,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:28,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:28,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2024-01-27 15:22:28,187 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:28,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:28,774 INFO L349 Elim1Store]: treesize reduction 12, result has 94.1 percent of original size [2024-01-27 15:22:28,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 208 [2024-01-27 15:22:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444083079] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:34,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:34,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2024-01-27 15:22:34,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15616578] [2024-01-27 15:22:34,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:34,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:22:34,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:22:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:22:34,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:34,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 409 transitions, 7065 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 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 15:22:34,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:34,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:34,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:38,088 INFO L124 PetriNetUnfolderBase]: 5710/8616 cut-off events. [2024-01-27 15:22:38,089 INFO L125 PetriNetUnfolderBase]: For 306246/306246 co-relation queries the response was YES. [2024-01-27 15:22:38,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80445 conditions, 8616 events. 5710/8616 cut-off events. For 306246/306246 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49281 event pairs, 1238 based on Foata normal form. 4/8600 useless extension candidates. Maximal degree in co-relation 80277. Up to 6824 conditions per place. [2024-01-27 15:22:38,186 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 353 selfloop transitions, 159 changer transitions 5/518 dead transitions. [2024-01-27 15:22:38,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 518 transitions, 9271 flow [2024-01-27 15:22:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:22:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:22:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 258 transitions. [2024-01-27 15:22:38,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35537190082644626 [2024-01-27 15:22:38,188 INFO L175 Difference]: Start difference. First operand has 259 places, 409 transitions, 7065 flow. Second operand 22 states and 258 transitions. [2024-01-27 15:22:38,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 518 transitions, 9271 flow [2024-01-27 15:22:39,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 518 transitions, 9080 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-01-27 15:22:39,176 INFO L231 Difference]: Finished difference. Result has 274 places, 425 transitions, 7616 flow [2024-01-27 15:22:39,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7616, PETRI_PLACES=274, PETRI_TRANSITIONS=425} [2024-01-27 15:22:39,177 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 241 predicate places. [2024-01-27 15:22:39,177 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 425 transitions, 7616 flow [2024-01-27 15:22:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 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 15:22:39,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:39,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:22:39,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:39,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:39,380 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 15:22:39,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash 217874701, now seen corresponding path program 19 times [2024-01-27 15:22:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:39,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341044] [2024-01-27 15:22:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:40,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341044] [2024-01-27 15:22:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341044] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916096961] [2024-01-27 15:22:40,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:22:40,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:40,136 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:40,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:22:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:40,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-27 15:22:40,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:40,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:40,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2024-01-27 15:22:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:22:40,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:41,279 INFO L349 Elim1Store]: treesize reduction 4, result has 98.8 percent of original size [2024-01-27 15:22:41,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 347 [2024-01-27 15:24:07,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-01-27 15:24:07,835 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-01-27 15:24:07,836 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-01-27 15:24:07,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:08,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-27 15:24:08,041 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:516) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 86 more [2024-01-27 15:24:08,046 INFO L158 Benchmark]: Toolchain (without parser) took 262784.40ms. Allocated memory was 167.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 138.5MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2024-01-27 15:24:08,046 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 80.4MB in the beginning and 80.2MB in the end (delta: 213.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:24:08,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.71ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 126.0MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-01-27 15:24:08,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.20ms. Allocated memory is still 167.8MB. Free memory was 126.0MB in the beginning and 122.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:24:08,047 INFO L158 Benchmark]: Boogie Preprocessor took 54.54ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 119.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:24:08,047 INFO L158 Benchmark]: RCFGBuilder took 1014.33ms. Allocated memory is still 167.8MB. Free memory was 119.7MB in the beginning and 60.8MB in the end (delta: 58.9MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2024-01-27 15:24:08,047 INFO L158 Benchmark]: TraceAbstraction took 261431.24ms. Allocated memory was 167.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 59.8MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 2.2GB. Max. memory is 16.1GB. [2024-01-27 15:24:08,048 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 109.1MB. Free memory was 80.4MB in the beginning and 80.2MB in the end (delta: 213.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.71ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 126.0MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.20ms. Allocated memory is still 167.8MB. Free memory was 126.0MB in the beginning and 122.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.54ms. Allocated memory is still 167.8MB. Free memory was 122.9MB in the beginning and 119.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1014.33ms. Allocated memory is still 167.8MB. Free memory was 119.7MB in the beginning and 60.8MB in the end (delta: 58.9MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. * TraceAbstraction took 261431.24ms. Allocated memory was 167.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 59.8MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 2.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/chl-chromosome-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:24:10,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:24:10,270 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-01-27 15:24:10,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:24:10,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:24:10,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:24:10,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:24:10,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:24:10,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:24:10,311 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:24:10,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:24:10,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:24:10,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:24:10,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:24:10,317 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:24:10,318 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:24:10,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:24:10,319 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:24:10,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:24:10,319 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:24:10,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:24:10,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:24:10,321 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:24:10,321 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-01-27 15:24:10,321 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-01-27 15:24:10,322 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:24:10,322 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-01-27 15:24:10,322 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:24:10,322 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:24:10,323 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:24:10,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:24:10,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:24:10,324 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:24:10,324 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:24:10,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:24:10,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:24:10,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:24:10,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:24:10,326 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-01-27 15:24:10,326 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-01-27 15:24:10,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:24:10,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:24:10,327 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:24:10,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:24:10,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:24:10,328 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-01-27 15:24:10,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-01-27 15:24:10,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:24:10,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:24:10,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:24:10,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:24:10,663 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:24:10,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2024-01-27 15:24:12,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:24:12,252 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:24:12,252 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2024-01-27 15:24:12,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c3115fb1/de148d292bea41a6aeed3ec03660ccee/FLAG4bca92775 [2024-01-27 15:24:12,279 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c3115fb1/de148d292bea41a6aeed3ec03660ccee [2024-01-27 15:24:12,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:24:12,284 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:24:12,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:24:12,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:24:12,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:24:12,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86fd097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12, skipping insertion in model container [2024-01-27 15:24:12,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:24:12,539 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/chl-chromosome-trans.wvr.c[3073,3086] [2024-01-27 15:24:12,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:24:12,579 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-01-27 15:24:12,588 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:24:12,623 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/chl-chromosome-trans.wvr.c[3073,3086] [2024-01-27 15:24:12,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:24:12,639 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:24:12,684 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/chl-chromosome-trans.wvr.c[3073,3086] [2024-01-27 15:24:12,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:24:12,709 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:24:12,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12 WrapperNode [2024-01-27 15:24:12,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:24:12,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:24:12,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:24:12,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:24:12,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,781 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 276 [2024-01-27 15:24:12,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:24:12,782 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:24:12,782 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:24:12,782 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:24:12,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,809 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,830 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 2, 9]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2024-01-27 15:24:12,831 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,831 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,848 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,850 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:24:12,858 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:24:12,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:24:12,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:24:12,860 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (1/1) ... [2024-01-27 15:24:12,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:24:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:24:12,895 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 15:24:12,920 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 15:24:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:24:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-01-27 15:24:12,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-01-27 15:24:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-01-27 15:24:12,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2024-01-27 15:24:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:24:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:24:12,951 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:24:12,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:24:12,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:24:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:24:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:24:12,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:24:12,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:24:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:24:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-01-27 15:24:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-01-27 15:24:12,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-01-27 15:24:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-01-27 15:24:12,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2024-01-27 15:24:12,956 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 15:24:13,107 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:24:13,109 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:24:13,655 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:24:13,656 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:24:14,015 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:24:14,016 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 15:24:14,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:24:14 BoogieIcfgContainer [2024-01-27 15:24:14,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:24:14,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:24:14,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:24:14,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:24:14,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:24:12" (1/3) ... [2024-01-27 15:24:14,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fa26ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:24:14, skipping insertion in model container [2024-01-27 15:24:14,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:24:12" (2/3) ... [2024-01-27 15:24:14,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fa26ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:24:14, skipping insertion in model container [2024-01-27 15:24:14,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:24:14" (3/3) ... [2024-01-27 15:24:14,024 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-01-27 15:24:14,033 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:24:14,041 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:24:14,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:24:14,041 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:24:14,106 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:24:14,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:24:14,164 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-01-27 15:24:14,164 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:24:14,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-01-27 15:24:14,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:24:14,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2024-01-27 15:24:14,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:24:14,183 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78e7bc9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:24:14,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:24:14,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:24:14,195 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-01-27 15:24:14,195 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:24:14,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:14,196 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] [2024-01-27 15:24:14,196 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 15:24:14,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1279864874, now seen corresponding path program 1 times [2024-01-27 15:24:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:14,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349053278] [2024-01-27 15:24:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:14,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:14,220 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:14,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-01-27 15:24:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:14,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:14,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:14,427 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 15:24:14,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:14,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349053278] [2024-01-27 15:24:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349053278] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:24:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191165286] [2024-01-27 15:24:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:14,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:24:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:24:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:24:14,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:14,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:24:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:14,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:14,714 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2024-01-27 15:24:14,715 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-01-27 15:24:14,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2024-01-27 15:24:14,722 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2024-01-27 15:24:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2024-01-27 15:24:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:24:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:24:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-01-27 15:24:14,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-01-27 15:24:14,735 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2024-01-27 15:24:14,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2024-01-27 15:24:14,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:24:14,741 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2024-01-27 15:24:14,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-27 15:24:14,747 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-27 15:24:14,748 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2024-01-27 15:24:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:24:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:14,748 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 15:24:14,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:14,959 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 15:24:14,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1152442264, now seen corresponding path program 1 times [2024-01-27 15:24:14,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:14,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288193819] [2024-01-27 15:24:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:14,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:14,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:14,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-01-27 15:24:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:15,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:24:15,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:24:15,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:24:15,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:15,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288193819] [2024-01-27 15:24:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288193819] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:15,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:24:15,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-01-27 15:24:15,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782684063] [2024-01-27 15:24:15,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:15,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:24:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:24:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:24:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:15,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 15:24:15,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:15,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:15,555 INFO L124 PetriNetUnfolderBase]: 223/344 cut-off events. [2024-01-27 15:24:15,555 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 15:24:15,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 344 events. 223/344 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 770 event pairs, 138 based on Foata normal form. 6/267 useless extension candidates. Maximal degree in co-relation 677. Up to 332 conditions per place. [2024-01-27 15:24:15,558 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 15 changer transitions 0/41 dead transitions. [2024-01-27 15:24:15,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 212 flow [2024-01-27 15:24:15,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:24:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:24:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-01-27 15:24:15,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-01-27 15:24:15,560 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 6 states and 73 transitions. [2024-01-27 15:24:15,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 212 flow [2024-01-27 15:24:15,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 41 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:24:15,579 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 186 flow [2024-01-27 15:24:15,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2024-01-27 15:24:15,580 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-01-27 15:24:15,580 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 186 flow [2024-01-27 15:24:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 15:24:15,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:15,580 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:24:15,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:15,784 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 15:24:15,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 155874994, now seen corresponding path program 2 times [2024-01-27 15:24:15,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:15,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802745723] [2024-01-27 15:24:15,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:24:15,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:15,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:15,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:15,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-01-27 15:24:15,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:24:15,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:15,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:24:15,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:15,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:15,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:15,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802745723] [2024-01-27 15:24:15,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802745723] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:15,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:15,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:24:15,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226256919] [2024-01-27 15:24:15,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:15,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:24:15,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:15,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:24:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:24:15,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:15,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:24:15,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:15,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:15,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:16,311 INFO L124 PetriNetUnfolderBase]: 369/569 cut-off events. [2024-01-27 15:24:16,312 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 15:24:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 569 events. 369/569 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1704 event pairs, 138 based on Foata normal form. 14/431 useless extension candidates. Maximal degree in co-relation 1125. Up to 344 conditions per place. [2024-01-27 15:24:16,316 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 64 selfloop transitions, 3 changer transitions 2/70 dead transitions. [2024-01-27 15:24:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 70 transitions, 389 flow [2024-01-27 15:24:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:24:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:24:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-01-27 15:24:16,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-01-27 15:24:16,320 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 186 flow. Second operand 4 states and 74 transitions. [2024-01-27 15:24:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 70 transitions, 389 flow [2024-01-27 15:24:16,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 365 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:24:16,326 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 182 flow [2024-01-27 15:24:16,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2024-01-27 15:24:16,327 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-01-27 15:24:16,328 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 182 flow [2024-01-27 15:24:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:24:16,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:16,328 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:24:16,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:16,531 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 15:24:16,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1594488576, now seen corresponding path program 3 times [2024-01-27 15:24:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291857084] [2024-01-27 15:24:16,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:24:16,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:16,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:16,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-01-27 15:24:16,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:24:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:16,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:24:16,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-01-27 15:24:16,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:16,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291857084] [2024-01-27 15:24:16,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291857084] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:16,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:24:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446141185] [2024-01-27 15:24:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:24:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:24:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:24:16,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:16,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:16,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:16,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:16,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:17,453 INFO L124 PetriNetUnfolderBase]: 894/1332 cut-off events. [2024-01-27 15:24:17,453 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-01-27 15:24:17,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1332 events. 894/1332 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5010 event pairs, 242 based on Foata normal form. 2/988 useless extension candidates. Maximal degree in co-relation 3099. Up to 628 conditions per place. [2024-01-27 15:24:17,460 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 96 selfloop transitions, 14 changer transitions 15/126 dead transitions. [2024-01-27 15:24:17,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 126 transitions, 698 flow [2024-01-27 15:24:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:24:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:24:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-01-27 15:24:17,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2024-01-27 15:24:17,463 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 182 flow. Second operand 8 states and 133 transitions. [2024-01-27 15:24:17,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 126 transitions, 698 flow [2024-01-27 15:24:17,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 126 transitions, 670 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-01-27 15:24:17,467 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 276 flow [2024-01-27 15:24:17,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=276, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2024-01-27 15:24:17,468 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 19 predicate places. [2024-01-27 15:24:17,468 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 276 flow [2024-01-27 15:24:17,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:17,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:17,469 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 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 15:24:17,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-01-27 15:24:17,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:17,673 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 15:24:17,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1884045228, now seen corresponding path program 4 times [2024-01-27 15:24:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937190270] [2024-01-27 15:24:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:24:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:17,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:17,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:17,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-01-27 15:24:17,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:24:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:17,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:24:17,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:24:17,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-01-27 15:24:18,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937190270] [2024-01-27 15:24:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937190270] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:24:18,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:24:18,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-01-27 15:24:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324324396] [2024-01-27 15:24:18,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-27 15:24:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:24:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:24:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:24:18,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:18,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 276 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:18,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:18,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:18,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:18,574 INFO L124 PetriNetUnfolderBase]: 848/1251 cut-off events. [2024-01-27 15:24:18,574 INFO L125 PetriNetUnfolderBase]: For 1803/1803 co-relation queries the response was YES. [2024-01-27 15:24:18,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4417 conditions, 1251 events. 848/1251 cut-off events. For 1803/1803 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4311 event pairs, 483 based on Foata normal form. 1/1002 useless extension candidates. Maximal degree in co-relation 4321. Up to 1233 conditions per place. [2024-01-27 15:24:18,582 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 39 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2024-01-27 15:24:18,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 408 flow [2024-01-27 15:24:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:24:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:24:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-01-27 15:24:18,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2024-01-27 15:24:18,585 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 276 flow. Second operand 7 states and 74 transitions. [2024-01-27 15:24:18,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 408 flow [2024-01-27 15:24:18,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 394 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-01-27 15:24:18,594 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 330 flow [2024-01-27 15:24:18,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=330, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-01-27 15:24:18,596 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-01-27 15:24:18,596 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 330 flow [2024-01-27 15:24:18,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:24:18,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:18,597 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 15:24:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:18,807 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 15:24:18,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -623161480, now seen corresponding path program 5 times [2024-01-27 15:24:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:18,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860460834] [2024-01-27 15:24:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:18,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:18,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:18,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-01-27 15:24:19,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:24:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:19,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:19,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:24:19,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:19,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860460834] [2024-01-27 15:24:19,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860460834] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:19,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:19,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:24:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867518008] [2024-01-27 15:24:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:24:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:24:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:24:19,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:19,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:24:19,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:19,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:19,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:19,509 INFO L124 PetriNetUnfolderBase]: 939/1424 cut-off events. [2024-01-27 15:24:19,509 INFO L125 PetriNetUnfolderBase]: For 1387/1387 co-relation queries the response was YES. [2024-01-27 15:24:19,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 1424 events. 939/1424 cut-off events. For 1387/1387 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5384 event pairs, 416 based on Foata normal form. 4/1208 useless extension candidates. Maximal degree in co-relation 4615. Up to 941 conditions per place. [2024-01-27 15:24:19,518 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 61 selfloop transitions, 5 changer transitions 7/74 dead transitions. [2024-01-27 15:24:19,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 538 flow [2024-01-27 15:24:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:24:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:24:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-01-27 15:24:19,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:24:19,520 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 330 flow. Second operand 3 states and 55 transitions. [2024-01-27 15:24:19,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 538 flow [2024-01-27 15:24:19,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 502 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:24:19,526 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 295 flow [2024-01-27 15:24:19,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-01-27 15:24:19,529 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-01-27 15:24:19,529 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 295 flow [2024-01-27 15:24:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 15:24:19,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:19,530 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 15:24:19,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:19,738 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 15:24:19,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2088075460, now seen corresponding path program 1 times [2024-01-27 15:24:19,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:19,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901954765] [2024-01-27 15:24:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:19,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:19,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:19,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:19,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-01-27 15:24:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:19,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:24:19,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:24:20,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:20,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:20,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901954765] [2024-01-27 15:24:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901954765] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:20,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:20,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:24:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349702651] [2024-01-27 15:24:20,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:20,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:24:20,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:24:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:24:20,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:20,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:24:20,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:20,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:20,463 INFO L124 PetriNetUnfolderBase]: 864/1307 cut-off events. [2024-01-27 15:24:20,464 INFO L125 PetriNetUnfolderBase]: For 1892/1892 co-relation queries the response was YES. [2024-01-27 15:24:20,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1307 events. 864/1307 cut-off events. For 1892/1892 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5030 event pairs, 287 based on Foata normal form. 40/1133 useless extension candidates. Maximal degree in co-relation 4437. Up to 732 conditions per place. [2024-01-27 15:24:20,471 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 92 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2024-01-27 15:24:20,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 98 transitions, 706 flow [2024-01-27 15:24:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:24:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:24:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-01-27 15:24:20,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-01-27 15:24:20,473 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 295 flow. Second operand 4 states and 73 transitions. [2024-01-27 15:24:20,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 98 transitions, 706 flow [2024-01-27 15:24:20,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 98 transitions, 657 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:24:20,479 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 318 flow [2024-01-27 15:24:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-01-27 15:24:20,480 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 25 predicate places. [2024-01-27 15:24:20,480 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 318 flow [2024-01-27 15:24:20,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:24:20,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:20,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 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 15:24:20,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-01-27 15:24:20,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:20,686 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 15:24:20,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:20,686 INFO L85 PathProgramCache]: Analyzing trace with hash 243720560, now seen corresponding path program 2 times [2024-01-27 15:24:20,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:20,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90860348] [2024-01-27 15:24:20,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:24:20,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:20,688 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-01-27 15:24:21,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:24:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:21,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:24:21,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-01-27 15:24:21,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:21,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90860348] [2024-01-27 15:24:21,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90860348] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:21,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:21,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:24:21,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230523194] [2024-01-27 15:24:21,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:21,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:24:21,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:24:21,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:24:21,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:21,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:24:21,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:21,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:21,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:21,401 INFO L124 PetriNetUnfolderBase]: 694/1043 cut-off events. [2024-01-27 15:24:21,401 INFO L125 PetriNetUnfolderBase]: For 1529/1529 co-relation queries the response was YES. [2024-01-27 15:24:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3708 conditions, 1043 events. 694/1043 cut-off events. For 1529/1529 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3765 event pairs, 83 based on Foata normal form. 40/907 useless extension candidates. Maximal degree in co-relation 3607. Up to 733 conditions per place. [2024-01-27 15:24:21,409 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 77 selfloop transitions, 8 changer transitions 1/87 dead transitions. [2024-01-27 15:24:21,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 620 flow [2024-01-27 15:24:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:24:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:24:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-01-27 15:24:21,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-01-27 15:24:21,410 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 318 flow. Second operand 4 states and 65 transitions. [2024-01-27 15:24:21,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 620 flow [2024-01-27 15:24:21,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 611 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:24:21,415 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-01-27 15:24:21,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-01-27 15:24:21,416 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 29 predicate places. [2024-01-27 15:24:21,416 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-01-27 15:24:21,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 15:24:21,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:21,417 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:24:21,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:21,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:21,623 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 15:24:21,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash -327271869, now seen corresponding path program 1 times [2024-01-27 15:24:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:21,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120281309] [2024-01-27 15:24:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:21,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:21,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:21,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:21,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-01-27 15:24:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:24:21,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:21,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:21,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:24:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:22,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:22,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120281309] [2024-01-27 15:24:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120281309] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:24:22,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:24:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-01-27 15:24:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540383553] [2024-01-27 15:24:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:22,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:24:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:24:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:24:22,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:22,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:22,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:22,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:22,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:22,427 INFO L124 PetriNetUnfolderBase]: 728/1081 cut-off events. [2024-01-27 15:24:22,427 INFO L125 PetriNetUnfolderBase]: For 2118/2118 co-relation queries the response was YES. [2024-01-27 15:24:22,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3957 conditions, 1081 events. 728/1081 cut-off events. For 2118/2118 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3661 event pairs, 111 based on Foata normal form. 24/917 useless extension candidates. Maximal degree in co-relation 3853. Up to 503 conditions per place. [2024-01-27 15:24:22,434 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 90 selfloop transitions, 10 changer transitions 1/102 dead transitions. [2024-01-27 15:24:22,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 769 flow [2024-01-27 15:24:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:24:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:24:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-01-27 15:24:22,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-01-27 15:24:22,436 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 5 states and 81 transitions. [2024-01-27 15:24:22,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 769 flow [2024-01-27 15:24:22,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 730 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-27 15:24:22,442 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 386 flow [2024-01-27 15:24:22,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-01-27 15:24:22,442 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2024-01-27 15:24:22,443 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 386 flow [2024-01-27 15:24:22,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:22,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:22,443 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:24:22,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:22,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:22,650 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 15:24:22,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1288491201, now seen corresponding path program 2 times [2024-01-27 15:24:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026837144] [2024-01-27 15:24:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:24:22,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:22,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:22,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:22,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-01-27 15:24:22,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:24:22,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:22,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:22,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:22,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:22,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026837144] [2024-01-27 15:24:22,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026837144] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:22,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:22,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:24:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344745059] [2024-01-27 15:24:22,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:24:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:22,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:24:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:24:22,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:22,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:23,448 INFO L124 PetriNetUnfolderBase]: 774/1153 cut-off events. [2024-01-27 15:24:23,448 INFO L125 PetriNetUnfolderBase]: For 2254/2254 co-relation queries the response was YES. [2024-01-27 15:24:23,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4393 conditions, 1153 events. 774/1153 cut-off events. For 2254/2254 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4086 event pairs, 217 based on Foata normal form. 14/975 useless extension candidates. Maximal degree in co-relation 4288. Up to 652 conditions per place. [2024-01-27 15:24:23,458 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 75 selfloop transitions, 12 changer transitions 11/99 dead transitions. [2024-01-27 15:24:23,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 734 flow [2024-01-27 15:24:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:24:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:24:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-01-27 15:24:23,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-01-27 15:24:23,460 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 386 flow. Second operand 5 states and 83 transitions. [2024-01-27 15:24:23,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 734 flow [2024-01-27 15:24:23,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:24:23,467 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 420 flow [2024-01-27 15:24:23,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-01-27 15:24:23,468 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2024-01-27 15:24:23,468 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 420 flow [2024-01-27 15:24:23,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:23,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:23,469 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:24:23,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:23,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:23,675 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 15:24:23,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1913814531, now seen corresponding path program 3 times [2024-01-27 15:24:23,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:23,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021020795] [2024-01-27 15:24:23,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:24:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:23,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:23,678 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:23,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-01-27 15:24:23,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:24:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:23,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:23,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:23,953 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:23,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:23,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021020795] [2024-01-27 15:24:23,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021020795] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:23,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:23,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:24:23,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045352975] [2024-01-27 15:24:23,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:24:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:24:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:24:23,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:23,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:23,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:23,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:23,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:24,418 INFO L124 PetriNetUnfolderBase]: 815/1204 cut-off events. [2024-01-27 15:24:24,418 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-01-27 15:24:24,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 1204 events. 815/1204 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4252 event pairs, 217 based on Foata normal form. 24/1022 useless extension candidates. Maximal degree in co-relation 4719. Up to 676 conditions per place. [2024-01-27 15:24:24,427 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-01-27 15:24:24,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 769 flow [2024-01-27 15:24:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:24:24,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:24:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-01-27 15:24:24,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-01-27 15:24:24,428 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 420 flow. Second operand 5 states and 83 transitions. [2024-01-27 15:24:24,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 769 flow [2024-01-27 15:24:24,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 756 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:24:24,436 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 444 flow [2024-01-27 15:24:24,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-01-27 15:24:24,437 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2024-01-27 15:24:24,437 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 444 flow [2024-01-27 15:24:24,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:24,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:24,438 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:24:24,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:24,643 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 15:24:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash 151440439, now seen corresponding path program 4 times [2024-01-27 15:24:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359857801] [2024-01-27 15:24:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:24:24,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:24,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:24,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-01-27 15:24:24,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:24:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:24,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:24,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:24,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:24,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359857801] [2024-01-27 15:24:24,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359857801] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:24,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:24,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:24:24,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189671788] [2024-01-27 15:24:24,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:24,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:24:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:24:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:24:24,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:24,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 444 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:24,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:24,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:24,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:25,396 INFO L124 PetriNetUnfolderBase]: 791/1180 cut-off events. [2024-01-27 15:24:25,397 INFO L125 PetriNetUnfolderBase]: For 3077/3077 co-relation queries the response was YES. [2024-01-27 15:24:25,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 1180 events. 791/1180 cut-off events. For 3077/3077 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4186 event pairs, 261 based on Foata normal form. 24/998 useless extension candidates. Maximal degree in co-relation 4689. Up to 806 conditions per place. [2024-01-27 15:24:25,404 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 92 selfloop transitions, 10 changer transitions 1/104 dead transitions. [2024-01-27 15:24:25,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 817 flow [2024-01-27 15:24:25,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:24:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:24:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-01-27 15:24:25,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-01-27 15:24:25,405 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 444 flow. Second operand 5 states and 85 transitions. [2024-01-27 15:24:25,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 817 flow [2024-01-27 15:24:25,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 787 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-27 15:24:25,414 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 438 flow [2024-01-27 15:24:25,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-01-27 15:24:25,415 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2024-01-27 15:24:25,415 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 438 flow [2024-01-27 15:24:25,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:25,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:25,415 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 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 15:24:25,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:25,620 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 15:24:25,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1887788291, now seen corresponding path program 5 times [2024-01-27 15:24:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:25,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508243794] [2024-01-27 15:24:25,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:24:25,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:25,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:25,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-01-27 15:24:26,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:24:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:24:26,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:24:26,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:24:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:24:26,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:24:26,066 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-01-27 15:24:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508243794] [2024-01-27 15:24:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508243794] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:24:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:24:26,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:24:26,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159920992] [2024-01-27 15:24:26,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:24:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:24:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-01-27 15:24:26,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:24:26,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:24:26,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:24:26,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:26,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:24:26,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:24:26,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:24:26,504 INFO L124 PetriNetUnfolderBase]: 702/1036 cut-off events. [2024-01-27 15:24:26,504 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2024-01-27 15:24:26,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4227 conditions, 1036 events. 702/1036 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3498 event pairs, 254 based on Foata normal form. 14/866 useless extension candidates. Maximal degree in co-relation 4119. Up to 815 conditions per place. [2024-01-27 15:24:26,513 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 8 changer transitions 11/96 dead transitions. [2024-01-27 15:24:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 753 flow [2024-01-27 15:24:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:24:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:24:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-01-27 15:24:26,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-01-27 15:24:26,515 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 438 flow. Second operand 5 states and 78 transitions. [2024-01-27 15:24:26,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 753 flow [2024-01-27 15:24:26,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 737 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-27 15:24:26,523 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 422 flow [2024-01-27 15:24:26,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2024-01-27 15:24:26,523 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2024-01-27 15:24:26,523 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 422 flow [2024-01-27 15:24:26,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 15:24:26,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:24:26,524 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 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 15:24:26,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:24:26,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:26,736 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 15:24:26,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:24:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2061182897, now seen corresponding path program 1 times [2024-01-27 15:24:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-01-27 15:24:26,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267150036] [2024-01-27 15:24:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:24:26,737 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-01-27 15:24:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-01-27 15:24:26,738 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-01-27 15:24:26,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process Killed by 15