./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 448d4d75 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/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-448d4d7-m [2024-02-20 11:38:13,738 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-20 11:38:13,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-20 11:38:13,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-20 11:38:13,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-20 11:38:13,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-20 11:38:13,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-20 11:38:13,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-20 11:38:13,834 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-20 11:38:13,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-20 11:38:13,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-20 11:38:13,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-20 11:38:13,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-20 11:38:13,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-20 11:38:13,839 INFO L153 SettingsManager]: * Use SBE=true [2024-02-20 11:38:13,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-20 11:38:13,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-20 11:38:13,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-20 11:38:13,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-20 11:38:13,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-20 11:38:13,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-20 11:38:13,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-20 11:38:13,842 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-20 11:38:13,843 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-20 11:38:13,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-20 11:38:13,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-20 11:38:13,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-20 11:38:13,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:38:13,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-20 11:38:13,859 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-20 11:38:13,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-20 11:38:13,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-20 11:38:13,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-20 11:38:14,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-20 11:38:14,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-20 11:38:14,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-20 11:38:14,097 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-20 11:38:14,098 INFO L274 PluginConnector]: CDTParser initialized [2024-02-20 11:38:14,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-02-20 11:38:15,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-20 11:38:15,233 INFO L384 CDTParser]: Found 1 translation units. [2024-02-20 11:38:15,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-02-20 11:38:15,259 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89587d31/a1798f5bd6e0491683d753ef238b2c83/FLAG409f4e380 [2024-02-20 11:38:15,270 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b89587d31/a1798f5bd6e0491683d753ef238b2c83 [2024-02-20 11:38:15,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-20 11:38:15,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-20 11:38:15,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-20 11:38:15,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-20 11:38:15,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-20 11:38:15,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61cd4227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15, skipping insertion in model container [2024-02-20 11:38:15,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,298 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-20 11:38:15,444 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/array-eq-symm.wvr.c[2251,2264] [2024-02-20 11:38:15,460 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:38:15,468 INFO L202 MainTranslator]: Completed pre-run [2024-02-20 11:38:15,489 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/array-eq-symm.wvr.c[2251,2264] [2024-02-20 11:38:15,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-20 11:38:15,512 INFO L206 MainTranslator]: Completed translation [2024-02-20 11:38:15,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15 WrapperNode [2024-02-20 11:38:15,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-20 11:38:15,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-20 11:38:15,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-20 11:38:15,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-20 11:38:15,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,555 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 117 [2024-02-20 11:38:15,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-20 11:38:15,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-20 11:38:15,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-20 11:38:15,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-20 11:38:15,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,574 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,594 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 6, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-02-20 11:38:15,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,613 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-20 11:38:15,619 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-20 11:38:15,619 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-20 11:38:15,619 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-20 11:38:15,620 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (1/1) ... [2024-02-20 11:38:15,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-20 11:38:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:15,644 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) [2024-02-20 11:38:15,663 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 [2024-02-20 11:38:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-20 11:38:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-20 11:38:15,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-20 11:38:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-20 11:38:15,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-20 11:38:15,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-20 11:38:15,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-20 11:38:15,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-20 11:38:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-20 11:38:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-02-20 11:38:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-20 11:38:15,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-20 11:38:15,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-20 11:38:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-20 11:38:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-20 11:38:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-20 11:38:15,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-20 11:38:15,727 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-20 11:38:15,862 INFO L244 CfgBuilder]: Building ICFG [2024-02-20 11:38:15,863 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-20 11:38:16,088 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-20 11:38:16,088 INFO L293 CfgBuilder]: Performing block encoding [2024-02-20 11:38:16,232 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-20 11:38:16,232 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-20 11:38:16,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:38:16 BoogieIcfgContainer [2024-02-20 11:38:16,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-20 11:38:16,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-20 11:38:16,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-20 11:38:16,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-20 11:38:16,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.02 11:38:15" (1/3) ... [2024-02-20 11:38:16,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cddfb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:38:16, skipping insertion in model container [2024-02-20 11:38:16,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.02 11:38:15" (2/3) ... [2024-02-20 11:38:16,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cddfb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.02 11:38:16, skipping insertion in model container [2024-02-20 11:38:16,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.02 11:38:16" (3/3) ... [2024-02-20 11:38:16,239 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-02-20 11:38:16,253 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-20 11:38:16,253 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-20 11:38:16,254 INFO L635 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-20 11:38:16,284 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-20 11:38:16,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 27 transitions, 68 flow [2024-02-20 11:38:16,337 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-02-20 11:38:16,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:38:16,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 6/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-02-20 11:38:16,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 27 transitions, 68 flow [2024-02-20 11:38:16,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 24 transitions, 60 flow [2024-02-20 11:38:16,356 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-20 11:38:16,361 INFO L369 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=All, 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;@1c9a5833, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-20 11:38:16,361 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-20 11:38:16,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-20 11:38:16,367 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2024-02-20 11:38:16,367 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-20 11:38:16,368 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:16,368 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:16,369 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:16,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1765490715, now seen corresponding path program 1 times [2024-02-20 11:38:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:16,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830579744] [2024-02-20 11:38:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:16,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830579744] [2024-02-20 11:38:16,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830579744] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:16,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:16,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-20 11:38:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735638510] [2024-02-20 11:38:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:16,805 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-20 11:38:16,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-20 11:38:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-20 11:38:16,833 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:16,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-02-20 11:38:16,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:16,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:16,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:16,964 INFO L124 PetriNetUnfolderBase]: 171/274 cut-off events. [2024-02-20 11:38:16,965 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-02-20 11:38:16,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 274 events. 171/274 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 783 event pairs, 45 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 472. Up to 155 conditions per place. [2024-02-20 11:38:16,971 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 35 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2024-02-20 11:38:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 40 transitions, 179 flow [2024-02-20 11:38:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-20 11:38:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-20 11:38:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-02-20 11:38:16,981 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-02-20 11:38:16,984 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2024-02-20 11:38:16,985 INFO L507 AbstractCegarLoop]: Abstraction has has 27 places, 40 transitions, 179 flow [2024-02-20 11:38:16,985 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2024-02-20 11:38:16,985 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:16,985 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:16,985 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-20 11:38:16,985 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:16,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:16,986 INFO L85 PathProgramCache]: Analyzing trace with hash 355922747, now seen corresponding path program 1 times [2024-02-20 11:38:16,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:16,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067233010] [2024-02-20 11:38:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:16,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:17,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067233010] [2024-02-20 11:38:17,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067233010] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:17,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:17,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:38:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061972865] [2024-02-20 11:38:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:17,075 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:38:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:38:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:38:17,076 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:17,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 40 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-02-20 11:38:17,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:17,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:17,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:17,197 INFO L124 PetriNetUnfolderBase]: 266/447 cut-off events. [2024-02-20 11:38:17,197 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-02-20 11:38:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 447 events. 266/447 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1589 event pairs, 78 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 700. Up to 274 conditions per place. [2024-02-20 11:38:17,200 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 61 selfloop transitions, 5 changer transitions 5/72 dead transitions. [2024-02-20 11:38:17,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 72 transitions, 467 flow [2024-02-20 11:38:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 11:38:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 11:38:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-02-20 11:38:17,202 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:38:17,203 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2024-02-20 11:38:17,203 INFO L507 AbstractCegarLoop]: Abstraction has has 31 places, 72 transitions, 467 flow [2024-02-20 11:38:17,204 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-02-20 11:38:17,204 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:17,204 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:17,204 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-20 11:38:17,205 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:17,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2135625879, now seen corresponding path program 1 times [2024-02-20 11:38:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461838080] [2024-02-20 11:38:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:17,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:17,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461838080] [2024-02-20 11:38:17,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461838080] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:17,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:17,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-20 11:38:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445732603] [2024-02-20 11:38:17,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:17,320 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-20 11:38:17,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-20 11:38:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-20 11:38:17,320 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:17,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 72 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-02-20 11:38:17,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:17,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:17,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:17,431 INFO L124 PetriNetUnfolderBase]: 197/335 cut-off events. [2024-02-20 11:38:17,431 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-02-20 11:38:17,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 335 events. 197/335 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1096 event pairs, 69 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 928. Up to 274 conditions per place. [2024-02-20 11:38:17,436 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 37 selfloop transitions, 2 changer transitions 17/57 dead transitions. [2024-02-20 11:38:17,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 57 transitions, 483 flow [2024-02-20 11:38:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 11:38:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 11:38:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-02-20 11:38:17,439 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-02-20 11:38:17,441 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-02-20 11:38:17,441 INFO L507 AbstractCegarLoop]: Abstraction has has 35 places, 57 transitions, 483 flow [2024-02-20 11:38:17,441 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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) [2024-02-20 11:38:17,442 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:17,442 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:17,442 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-20 11:38:17,442 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:17,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1007824229, now seen corresponding path program 1 times [2024-02-20 11:38:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:17,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066157079] [2024-02-20 11:38:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:17,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:17,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066157079] [2024-02-20 11:38:17,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066157079] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:17,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:17,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:17,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461339859] [2024-02-20 11:38:17,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:17,581 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:17,584 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:17,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 57 transitions, 483 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-02-20 11:38:17,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:17,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:17,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:17,698 INFO L124 PetriNetUnfolderBase]: 391/686 cut-off events. [2024-02-20 11:38:17,698 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-02-20 11:38:17,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 686 events. 391/686 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2844 event pairs, 126 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 1636. Up to 568 conditions per place. [2024-02-20 11:38:17,702 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 72 selfloop transitions, 6 changer transitions 34/113 dead transitions. [2024-02-20 11:38:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 113 transitions, 1194 flow [2024-02-20 11:38:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 11:38:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 11:38:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-02-20 11:38:17,703 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-02-20 11:38:17,704 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 14 predicate places. [2024-02-20 11:38:17,704 INFO L507 AbstractCegarLoop]: Abstraction has has 39 places, 113 transitions, 1194 flow [2024-02-20 11:38:17,704 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-02-20 11:38:17,704 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:17,704 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:17,704 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-20 11:38:17,704 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:17,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 566409853, now seen corresponding path program 1 times [2024-02-20 11:38:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862532656] [2024-02-20 11:38:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:17,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:17,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862532656] [2024-02-20 11:38:17,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862532656] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:17,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:17,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-20 11:38:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251076551] [2024-02-20 11:38:17,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:17,778 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-20 11:38:17,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-20 11:38:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-20 11:38:17,779 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:17,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 113 transitions, 1194 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-02-20 11:38:17,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:17,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:17,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:17,876 INFO L124 PetriNetUnfolderBase]: 318/564 cut-off events. [2024-02-20 11:38:17,876 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-02-20 11:38:17,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3451 conditions, 564 events. 318/564 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2250 event pairs, 117 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 1960. Up to 448 conditions per place. [2024-02-20 11:38:17,879 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 52 selfloop transitions, 3 changer transitions 40/96 dead transitions. [2024-02-20 11:38:17,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 96 transitions, 1205 flow [2024-02-20 11:38:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-20 11:38:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-20 11:38:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-02-20 11:38:17,881 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-02-20 11:38:17,881 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2024-02-20 11:38:17,881 INFO L507 AbstractCegarLoop]: Abstraction has has 43 places, 96 transitions, 1205 flow [2024-02-20 11:38:17,882 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2024-02-20 11:38:17,882 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:17,882 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:17,882 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-20 11:38:17,882 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:17,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash 940067463, now seen corresponding path program 1 times [2024-02-20 11:38:17,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:17,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054467680] [2024-02-20 11:38:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054467680] [2024-02-20 11:38:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054467680] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260541384] [2024-02-20 11:38:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:18,003 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) [2024-02-20 11:38:18,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-20 11:38:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:18,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 11:38:18,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:18,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:18,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260541384] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:18,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 11:38:18,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-02-20 11:38:18,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7211223] [2024-02-20 11:38:18,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:18,252 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 11:38:18,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 11:38:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:18,254 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:18,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 96 transitions, 1205 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:18,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:18,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:18,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:18,456 INFO L124 PetriNetUnfolderBase]: 436/783 cut-off events. [2024-02-20 11:38:18,456 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-02-20 11:38:18,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 783 events. 436/783 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3319 event pairs, 117 based on Foata normal form. 0/619 useless extension candidates. Maximal degree in co-relation 3552. Up to 664 conditions per place. [2024-02-20 11:38:18,461 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 10 changer transitions 40/133 dead transitions. [2024-02-20 11:38:18,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 133 transitions, 1934 flow [2024-02-20 11:38:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-20 11:38:18,463 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-02-20 11:38:18,463 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-02-20 11:38:18,463 INFO L507 AbstractCegarLoop]: Abstraction has has 49 places, 133 transitions, 1934 flow [2024-02-20 11:38:18,463 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:18,463 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:18,464 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:18,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:18,675 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-20 11:38:18,675 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash 498653087, now seen corresponding path program 1 times [2024-02-20 11:38:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044958972] [2024-02-20 11:38:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:18,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044958972] [2024-02-20 11:38:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044958972] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810647555] [2024-02-20 11:38:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:18,801 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) [2024-02-20 11:38:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-20 11:38:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:18,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-20 11:38:18,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:18,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:38:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810647555] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:19,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 11:38:19,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-02-20 11:38:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786945817] [2024-02-20 11:38:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:19,004 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 11:38:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:19,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 11:38:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:19,005 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 133 transitions, 1934 flow. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:19,202 INFO L124 PetriNetUnfolderBase]: 456/864 cut-off events. [2024-02-20 11:38:19,203 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-02-20 11:38:19,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6963 conditions, 864 events. 456/864 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4027 event pairs, 117 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 4340. Up to 742 conditions per place. [2024-02-20 11:38:19,210 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 104 selfloop transitions, 13 changer transitions 40/158 dead transitions. [2024-02-20 11:38:19,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 158 transitions, 2616 flow [2024-02-20 11:38:19,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-02-20 11:38:19,213 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-20 11:38:19,214 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-02-20 11:38:19,214 INFO L507 AbstractCegarLoop]: Abstraction has has 55 places, 158 transitions, 2616 flow [2024-02-20 11:38:19,214 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:19,214 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:19,215 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:19,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-20 11:38:19,425 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-02-20 11:38:19,426 INFO L432 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:19,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 611275900, now seen corresponding path program 1 times [2024-02-20 11:38:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:19,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119732515] [2024-02-20 11:38:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:19,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:19,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119732515] [2024-02-20 11:38:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119732515] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:19,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480047431] [2024-02-20 11:38:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:19,695 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:19,696 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:19,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 158 transitions, 2616 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:19,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:19,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:19,913 INFO L124 PetriNetUnfolderBase]: 467/881 cut-off events. [2024-02-20 11:38:19,913 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-20 11:38:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7973 conditions, 881 events. 467/881 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4130 event pairs, 105 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 5033. Up to 759 conditions per place. [2024-02-20 11:38:19,920 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 117 selfloop transitions, 11 changer transitions 44/173 dead transitions. [2024-02-20 11:38:19,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 173 transitions, 3203 flow [2024-02-20 11:38:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-02-20 11:38:19,922 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-02-20 11:38:19,924 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2024-02-20 11:38:19,924 INFO L507 AbstractCegarLoop]: Abstraction has has 61 places, 173 transitions, 3203 flow [2024-02-20 11:38:19,925 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:19,925 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:19,925 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:19,925 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-20 11:38:19,925 INFO L432 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:19,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -930888922, now seen corresponding path program 2 times [2024-02-20 11:38:19,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:19,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125711162] [2024-02-20 11:38:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125711162] [2024-02-20 11:38:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125711162] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:20,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:20,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:20,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306247360] [2024-02-20 11:38:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:20,249 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:20,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:20,250 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:20,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 173 transitions, 3203 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:20,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:20,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:20,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:20,444 INFO L124 PetriNetUnfolderBase]: 471/889 cut-off events. [2024-02-20 11:38:20,444 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-02-20 11:38:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8927 conditions, 889 events. 471/889 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4156 event pairs, 96 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 5670. Up to 767 conditions per place. [2024-02-20 11:38:20,451 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 124 selfloop transitions, 12 changer transitions 55/192 dead transitions. [2024-02-20 11:38:20,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 192 transitions, 3933 flow [2024-02-20 11:38:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-02-20 11:38:20,453 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-02-20 11:38:20,453 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2024-02-20 11:38:20,453 INFO L507 AbstractCegarLoop]: Abstraction has has 67 places, 192 transitions, 3933 flow [2024-02-20 11:38:20,454 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:20,454 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:20,454 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:20,454 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-20 11:38:20,456 INFO L432 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:20,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -75862274, now seen corresponding path program 3 times [2024-02-20 11:38:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963093107] [2024-02-20 11:38:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:20,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963093107] [2024-02-20 11:38:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963093107] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:20,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522495377] [2024-02-20 11:38:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:38:20,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:20,731 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) [2024-02-20 11:38:20,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-20 11:38:20,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:38:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:20,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:38:20,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:20,933 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-20 11:38:20,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-02-20 11:38:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:20,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:21,014 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:21,014 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 40 treesize of output 56 [2024-02-20 11:38:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:21,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522495377] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:21,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:21,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-02-20 11:38:21,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298821389] [2024-02-20 11:38:21,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:21,050 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:38:21,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:21,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:38:21,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:38:21,051 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:21,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 192 transitions, 3933 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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) [2024-02-20 11:38:21,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:21,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:21,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:21,287 INFO L124 PetriNetUnfolderBase]: 493/927 cut-off events. [2024-02-20 11:38:21,288 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2024-02-20 11:38:21,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 927 events. 493/927 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4376 event pairs, 90 based on Foata normal form. 0/769 useless extension candidates. Maximal degree in co-relation 6565. Up to 805 conditions per place. [2024-02-20 11:38:21,299 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 129 selfloop transitions, 21 changer transitions 55/206 dead transitions. [2024-02-20 11:38:21,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 206 transitions, 4629 flow [2024-02-20 11:38:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 11:38:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 11:38:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-02-20 11:38:21,301 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:38:21,301 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2024-02-20 11:38:21,301 INFO L507 AbstractCegarLoop]: Abstraction has has 74 places, 206 transitions, 4629 flow [2024-02-20 11:38:21,301 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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) [2024-02-20 11:38:21,302 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:21,302 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:21,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:21,513 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:21,514 INFO L432 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:21,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1680330521, now seen corresponding path program 1 times [2024-02-20 11:38:21,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:21,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027036653] [2024-02-20 11:38:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:21,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:21,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027036653] [2024-02-20 11:38:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027036653] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:21,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986473067] [2024-02-20 11:38:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:21,766 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:21,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:21,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:21,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:21,767 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:21,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 206 transitions, 4629 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:21,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:21,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:21,954 INFO L124 PetriNetUnfolderBase]: 499/939 cut-off events. [2024-02-20 11:38:21,954 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2024-02-20 11:38:21,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11294 conditions, 939 events. 499/939 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4478 event pairs, 84 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 8373. Up to 817 conditions per place. [2024-02-20 11:38:21,966 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 134 selfloop transitions, 14 changer transitions 71/220 dead transitions. [2024-02-20 11:38:21,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 220 transitions, 5381 flow [2024-02-20 11:38:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:21,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-02-20 11:38:21,967 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:38:21,968 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2024-02-20 11:38:21,968 INFO L507 AbstractCegarLoop]: Abstraction has has 80 places, 220 transitions, 5381 flow [2024-02-20 11:38:21,968 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:21,968 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:21,968 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:21,968 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-20 11:38:21,969 INFO L432 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:21,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:21,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1983676802, now seen corresponding path program 4 times [2024-02-20 11:38:21,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:21,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143280311] [2024-02-20 11:38:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:21,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:22,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:22,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143280311] [2024-02-20 11:38:22,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143280311] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:22,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507153366] [2024-02-20 11:38:22,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:38:22,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:22,297 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) [2024-02-20 11:38:22,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-20 11:38:22,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:38:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:22,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:38:22,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:22,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:38:22,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-02-20 11:38:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:22,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:22,514 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:22,514 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 40 treesize of output 56 [2024-02-20 11:38:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:22,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507153366] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:22,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:22,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-02-20 11:38:22,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767173392] [2024-02-20 11:38:22,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:22,546 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 11:38:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 11:38:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:22,547 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:22,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 220 transitions, 5381 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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) [2024-02-20 11:38:22,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:22,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:22,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:22,889 INFO L124 PetriNetUnfolderBase]: 593/1106 cut-off events. [2024-02-20 11:38:22,890 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-02-20 11:38:22,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14400 conditions, 1106 events. 593/1106 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5468 event pairs, 72 based on Foata normal form. 0/922 useless extension candidates. Maximal degree in co-relation 11052. Up to 983 conditions per place. [2024-02-20 11:38:22,901 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 165 selfloop transitions, 25 changer transitions 71/262 dead transitions. [2024-02-20 11:38:22,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 262 transitions, 6932 flow [2024-02-20 11:38:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:38:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:38:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-02-20 11:38:22,903 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2024-02-20 11:38:22,903 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2024-02-20 11:38:22,903 INFO L507 AbstractCegarLoop]: Abstraction has has 91 places, 262 transitions, 6932 flow [2024-02-20 11:38:22,904 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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) [2024-02-20 11:38:22,904 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:22,904 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:22,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:23,115 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:23,115 INFO L432 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 743791921, now seen corresponding path program 2 times [2024-02-20 11:38:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022718995] [2024-02-20 11:38:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:23,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:23,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022718995] [2024-02-20 11:38:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022718995] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:23,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:23,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:23,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401625460] [2024-02-20 11:38:23,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:23,340 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:23,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:23,341 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:23,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 262 transitions, 6932 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:23,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:23,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:23,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:23,564 INFO L124 PetriNetUnfolderBase]: 599/1118 cut-off events. [2024-02-20 11:38:23,564 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-02-20 11:38:23,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15667 conditions, 1118 events. 599/1118 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5549 event pairs, 84 based on Foata normal form. 0/934 useless extension candidates. Maximal degree in co-relation 12068. Up to 995 conditions per place. [2024-02-20 11:38:23,574 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 175 selfloop transitions, 14 changer transitions 77/267 dead transitions. [2024-02-20 11:38:23,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 267 transitions, 7597 flow [2024-02-20 11:38:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-02-20 11:38:23,576 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-02-20 11:38:23,576 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2024-02-20 11:38:23,576 INFO L507 AbstractCegarLoop]: Abstraction has has 97 places, 267 transitions, 7597 flow [2024-02-20 11:38:23,577 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:23,577 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:23,577 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:23,577 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-20 11:38:23,577 INFO L432 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash -117067163, now seen corresponding path program 3 times [2024-02-20 11:38:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044724917] [2024-02-20 11:38:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044724917] [2024-02-20 11:38:23,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044724917] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:23,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626364242] [2024-02-20 11:38:23,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:38:23,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:23,820 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) [2024-02-20 11:38:23,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-20 11:38:23,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-20 11:38:23,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:23,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:38:23,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:23,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:38:23,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:38:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:23,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:24,024 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:24,024 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 40 treesize of output 56 [2024-02-20 11:38:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626364242] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:24,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 11:38:24,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 12 [2024-02-20 11:38:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553627578] [2024-02-20 11:38:24,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:24,052 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 11:38:24,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:24,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 11:38:24,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:38:24,053 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:24,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 267 transitions, 7597 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-02-20 11:38:24,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:24,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:24,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:24,293 INFO L124 PetriNetUnfolderBase]: 617/1148 cut-off events. [2024-02-20 11:38:24,294 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-02-20 11:38:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17227 conditions, 1148 events. 617/1148 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5723 event pairs, 84 based on Foata normal form. 0/960 useless extension candidates. Maximal degree in co-relation 13377. Up to 1025 conditions per place. [2024-02-20 11:38:24,302 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 185 selfloop transitions, 14 changer transitions 77/277 dead transitions. [2024-02-20 11:38:24,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 277 transitions, 8429 flow [2024-02-20 11:38:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:38:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:38:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-02-20 11:38:24,304 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-02-20 11:38:24,304 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 77 predicate places. [2024-02-20 11:38:24,304 INFO L507 AbstractCegarLoop]: Abstraction has has 102 places, 277 transitions, 8429 flow [2024-02-20 11:38:24,304 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-02-20 11:38:24,304 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:24,304 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:24,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:24,516 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-20 11:38:24,516 INFO L432 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:24,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -943441004, now seen corresponding path program 5 times [2024-02-20 11:38:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793298364] [2024-02-20 11:38:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793298364] [2024-02-20 11:38:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793298364] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380490120] [2024-02-20 11:38:24,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:38:24,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:24,719 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) [2024-02-20 11:38:24,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-20 11:38:24,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:38:24,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:24,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:38:24,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:24,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:38:24,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-02-20 11:38:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:24,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:24,941 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:24,942 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 40 treesize of output 56 [2024-02-20 11:38:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380490120] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:24,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-20 11:38:24,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2024-02-20 11:38:24,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685597170] [2024-02-20 11:38:24,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:24,967 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-20 11:38:24,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:24,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-20 11:38:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:24,968 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:24,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 277 transitions, 8429 flow. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-02-20 11:38:24,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:24,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:24,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:25,234 INFO L124 PetriNetUnfolderBase]: 593/1124 cut-off events. [2024-02-20 11:38:25,235 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-02-20 11:38:25,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17983 conditions, 1124 events. 593/1124 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5645 event pairs, 88 based on Foata normal form. 0/960 useless extension candidates. Maximal degree in co-relation 13882. Up to 1001 conditions per place. [2024-02-20 11:38:25,247 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 198 selfloop transitions, 16 changer transitions 77/292 dead transitions. [2024-02-20 11:38:25,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 292 transitions, 9470 flow [2024-02-20 11:38:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-20 11:38:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-20 11:38:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2024-02-20 11:38:25,249 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-02-20 11:38:25,249 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2024-02-20 11:38:25,249 INFO L507 AbstractCegarLoop]: Abstraction has has 107 places, 292 transitions, 9470 flow [2024-02-20 11:38:25,249 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2024-02-20 11:38:25,250 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:25,250 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:25,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:25,461 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-20 11:38:25,462 INFO L432 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 222622033, now seen corresponding path program 4 times [2024-02-20 11:38:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:25,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187773043] [2024-02-20 11:38:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:25,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187773043] [2024-02-20 11:38:25,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187773043] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:25,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493082918] [2024-02-20 11:38:25,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:38:25,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:25,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:25,659 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) [2024-02-20 11:38:25,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-20 11:38:25,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:38:25,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:25,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:38:25,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:25,813 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-20 11:38:25,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-02-20 11:38:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:25,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:25,882 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:25,882 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 40 treesize of output 56 [2024-02-20 11:38:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493082918] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:25,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:25,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-02-20 11:38:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496747329] [2024-02-20 11:38:25,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:25,907 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-20 11:38:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-20 11:38:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-02-20 11:38:25,908 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:25,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 292 transitions, 9470 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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) [2024-02-20 11:38:25,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:25,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:26,251 INFO L124 PetriNetUnfolderBase]: 611/1154 cut-off events. [2024-02-20 11:38:26,252 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-02-20 11:38:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19609 conditions, 1154 events. 611/1154 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5836 event pairs, 72 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 15257. Up to 1031 conditions per place. [2024-02-20 11:38:26,263 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 202 selfloop transitions, 22 changer transitions 77/302 dead transitions. [2024-02-20 11:38:26,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 302 transitions, 10392 flow [2024-02-20 11:38:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-20 11:38:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-20 11:38:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-02-20 11:38:26,264 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-02-20 11:38:26,265 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2024-02-20 11:38:26,265 INFO L507 AbstractCegarLoop]: Abstraction has has 114 places, 302 transitions, 10392 flow [2024-02-20 11:38:26,265 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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) [2024-02-20 11:38:26,265 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:26,265 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:26,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:26,476 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:26,476 INFO L432 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:26,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:26,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1784027719, now seen corresponding path program 5 times [2024-02-20 11:38:26,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:26,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803931916] [2024-02-20 11:38:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:26,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803931916] [2024-02-20 11:38:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803931916] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:26,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:26,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437162252] [2024-02-20 11:38:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:26,653 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:26,654 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:26,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 302 transitions, 10392 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:26,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:26,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:26,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:26,941 INFO L124 PetriNetUnfolderBase]: 605/1148 cut-off events. [2024-02-20 11:38:26,942 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-02-20 11:38:26,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20647 conditions, 1148 events. 605/1148 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5821 event pairs, 84 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 16044. Up to 1025 conditions per place. [2024-02-20 11:38:26,951 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 205 selfloop transitions, 13 changer transitions 82/301 dead transitions. [2024-02-20 11:38:26,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 301 transitions, 10958 flow [2024-02-20 11:38:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-02-20 11:38:26,952 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-02-20 11:38:26,953 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2024-02-20 11:38:26,953 INFO L507 AbstractCegarLoop]: Abstraction has has 120 places, 301 transitions, 10958 flow [2024-02-20 11:38:26,953 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:26,953 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:26,953 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:26,954 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-20 11:38:26,954 INFO L432 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:26,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1760041263, now seen corresponding path program 6 times [2024-02-20 11:38:26,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:26,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335499856] [2024-02-20 11:38:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:26,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:27,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:27,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335499856] [2024-02-20 11:38:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335499856] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:27,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762635860] [2024-02-20 11:38:27,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:38:27,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:27,150 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) [2024-02-20 11:38:27,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-20 11:38:27,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-20 11:38:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:27,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:38:27,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:27,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:38:27,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:38:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:27,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:27,360 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:38:27,360 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 40 treesize of output 56 [2024-02-20 11:38:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:27,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762635860] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:27,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:27,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2024-02-20 11:38:27,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229074430] [2024-02-20 11:38:27,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:27,384 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-20 11:38:27,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-20 11:38:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-02-20 11:38:27,386 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:27,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 301 transitions, 10958 flow. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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) [2024-02-20 11:38:27,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:27,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:27,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:27,701 INFO L124 PetriNetUnfolderBase]: 593/1118 cut-off events. [2024-02-20 11:38:27,701 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-02-20 11:38:27,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21245 conditions, 1118 events. 593/1118 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5604 event pairs, 72 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 16471. Up to 997 conditions per place. [2024-02-20 11:38:27,712 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 210 selfloop transitions, 24 changer transitions 82/317 dead transitions. [2024-02-20 11:38:27,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 317 transitions, 12154 flow [2024-02-20 11:38:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-20 11:38:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-20 11:38:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-02-20 11:38:27,715 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.36728395061728397 [2024-02-20 11:38:27,715 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2024-02-20 11:38:27,715 INFO L507 AbstractCegarLoop]: Abstraction has has 131 places, 317 transitions, 12154 flow [2024-02-20 11:38:27,716 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 14 states have internal predecessors, (80), 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) [2024-02-20 11:38:27,716 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:27,716 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:27,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:27,940 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-20 11:38:27,940 INFO L432 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:27,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -653646154, now seen corresponding path program 6 times [2024-02-20 11:38:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514902093] [2024-02-20 11:38:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514902093] [2024-02-20 11:38:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514902093] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:28,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-20 11:38:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-20 11:38:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012027778] [2024-02-20 11:38:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:28,125 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-20 11:38:28,125 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:28,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 317 transitions, 12154 flow. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:28,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:28,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:28,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:28,355 INFO L124 PetriNetUnfolderBase]: 547/1015 cut-off events. [2024-02-20 11:38:28,355 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-02-20 11:38:28,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20345 conditions, 1015 events. 547/1015 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4905 event pairs, 72 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 15450. Up to 897 conditions per place. [2024-02-20 11:38:28,367 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 210 selfloop transitions, 11 changer transitions 85/307 dead transitions. [2024-02-20 11:38:28,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 307 transitions, 12377 flow [2024-02-20 11:38:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-02-20 11:38:28,368 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-02-20 11:38:28,369 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2024-02-20 11:38:28,369 INFO L507 AbstractCegarLoop]: Abstraction has has 137 places, 307 transitions, 12377 flow [2024-02-20 11:38:28,369 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:38:28,369 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:28,369 INFO L234 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] [2024-02-20 11:38:28,369 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-20 11:38:28,369 INFO L432 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:28,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1254907135, now seen corresponding path program 1 times [2024-02-20 11:38:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:28,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740235426] [2024-02-20 11:38:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:28,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740235426] [2024-02-20 11:38:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740235426] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231134211] [2024-02-20 11:38:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:28,447 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) [2024-02-20 11:38:28,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-20 11:38:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:28,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 11:38:28,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:28,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:28,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231134211] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:28,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:28,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-02-20 11:38:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236222208] [2024-02-20 11:38:28,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:28,596 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 11:38:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 11:38:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-20 11:38:28,597 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:28,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 307 transitions, 12377 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-02-20 11:38:28,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:28,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:28,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:28,931 INFO L124 PetriNetUnfolderBase]: 993/1807 cut-off events. [2024-02-20 11:38:28,932 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-02-20 11:38:28,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37967 conditions, 1807 events. 993/1807 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9546 event pairs, 72 based on Foata normal form. 8/1507 useless extension candidates. Maximal degree in co-relation 32221. Up to 1685 conditions per place. [2024-02-20 11:38:28,952 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 338 selfloop transitions, 29 changer transitions 93/461 dead transitions. [2024-02-20 11:38:28,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 461 transitions, 19544 flow [2024-02-20 11:38:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-02-20 11:38:28,953 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-02-20 11:38:28,953 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 118 predicate places. [2024-02-20 11:38:28,954 INFO L507 AbstractCegarLoop]: Abstraction has has 143 places, 461 transitions, 19544 flow [2024-02-20 11:38:28,954 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-02-20 11:38:28,954 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:28,954 INFO L234 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] [2024-02-20 11:38:28,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:29,168 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:29,168 INFO L432 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:29,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash 461245931, now seen corresponding path program 2 times [2024-02-20 11:38:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:29,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184313848] [2024-02-20 11:38:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184313848] [2024-02-20 11:38:29,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184313848] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155829859] [2024-02-20 11:38:29,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:38:29,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:29,223 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) [2024-02-20 11:38:29,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-20 11:38:29,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:38:29,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:29,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 11:38:29,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:29,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:38:29,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155829859] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:29,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:29,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-02-20 11:38:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889381039] [2024-02-20 11:38:29,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:29,347 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-20 11:38:29,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-20 11:38:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-20 11:38:29,348 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 461 transitions, 19544 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-02-20 11:38:29,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:29,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:29,923 INFO L124 PetriNetUnfolderBase]: 1425/2571 cut-off events. [2024-02-20 11:38:29,923 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2024-02-20 11:38:29,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56539 conditions, 2571 events. 1425/2571 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14612 event pairs, 72 based on Foata normal form. 8/2095 useless extension candidates. Maximal degree in co-relation 50156. Up to 2445 conditions per place. [2024-02-20 11:38:29,952 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 474 selfloop transitions, 29 changer transitions 101/605 dead transitions. [2024-02-20 11:38:29,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 605 transitions, 26872 flow [2024-02-20 11:38:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-20 11:38:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-20 11:38:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-02-20 11:38:29,954 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-02-20 11:38:29,954 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 124 predicate places. [2024-02-20 11:38:29,954 INFO L507 AbstractCegarLoop]: Abstraction has has 149 places, 605 transitions, 26872 flow [2024-02-20 11:38:29,954 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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) [2024-02-20 11:38:29,954 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:29,954 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:29,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:30,165 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-02-20 11:38:30,166 INFO L432 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:30,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash -32557409, now seen corresponding path program 3 times [2024-02-20 11:38:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654955770] [2024-02-20 11:38:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:30,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:30,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654955770] [2024-02-20 11:38:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654955770] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991655328] [2024-02-20 11:38:30,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:38:30,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:30,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:30,240 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) [2024-02-20 11:38:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-20 11:38:30,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:38:30,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:30,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 11:38:30,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:30,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991655328] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:30,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:30,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-02-20 11:38:30,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280813595] [2024-02-20 11:38:30,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:30,453 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 11:38:30,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 11:38:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:30,454 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:30,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 605 transitions, 26872 flow. Second operand has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 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) [2024-02-20 11:38:30,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:30,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:30,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:32,057 INFO L124 PetriNetUnfolderBase]: 3004/5588 cut-off events. [2024-02-20 11:38:32,057 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2024-02-20 11:38:32,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128517 conditions, 5588 events. 3004/5588 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 38513 event pairs, 120 based on Foata normal form. 0/4792 useless extension candidates. Maximal degree in co-relation 52431. Up to 5393 conditions per place. [2024-02-20 11:38:32,119 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 981 selfloop transitions, 71 changer transitions 420/1473 dead transitions. [2024-02-20 11:38:32,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 1473 transitions, 68446 flow [2024-02-20 11:38:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:38:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:38:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 264 transitions. [2024-02-20 11:38:32,121 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:38:32,121 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 145 predicate places. [2024-02-20 11:38:32,121 INFO L507 AbstractCegarLoop]: Abstraction has has 170 places, 1473 transitions, 68446 flow [2024-02-20 11:38:32,121 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.933333333333334) internal successors, (104), 15 states have internal predecessors, (104), 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) [2024-02-20 11:38:32,121 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:32,122 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:32,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:32,322 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-02-20 11:38:32,322 INFO L432 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:32,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2009800895, now seen corresponding path program 4 times [2024-02-20 11:38:32,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:32,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921672108] [2024-02-20 11:38:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:32,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:32,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:32,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921672108] [2024-02-20 11:38:32,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921672108] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:32,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084078342] [2024-02-20 11:38:32,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:38:32,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:32,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:32,406 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) [2024-02-20 11:38:32,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-20 11:38:32,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:38:32,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:32,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-20 11:38:32,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:38:32,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-20 11:38:32,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084078342] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-20 11:38:32,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-20 11:38:32,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 12 [2024-02-20 11:38:32,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575944499] [2024-02-20 11:38:32,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-20 11:38:32,593 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-20 11:38:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-20 11:38:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-02-20 11:38:32,594 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:32,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 1473 transitions, 68446 flow. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 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) [2024-02-20 11:38:32,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:32,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:32,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:35,671 INFO L124 PetriNetUnfolderBase]: 3322/6283 cut-off events. [2024-02-20 11:38:35,671 INFO L125 PetriNetUnfolderBase]: For 746/746 co-relation queries the response was YES. [2024-02-20 11:38:35,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150769 conditions, 6283 events. 3322/6283 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 45254 event pairs, 120 based on Foata normal form. 5/5426 useless extension candidates. Maximal degree in co-relation 64821. Up to 6085 conditions per place. [2024-02-20 11:38:35,743 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 984 selfloop transitions, 229 changer transitions 644/1858 dead transitions. [2024-02-20 11:38:35,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 1858 transitions, 90050 flow [2024-02-20 11:38:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-20 11:38:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-20 11:38:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-02-20 11:38:35,759 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-02-20 11:38:35,760 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 154 predicate places. [2024-02-20 11:38:35,760 INFO L507 AbstractCegarLoop]: Abstraction has has 179 places, 1858 transitions, 90050 flow [2024-02-20 11:38:35,760 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 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) [2024-02-20 11:38:35,760 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:35,760 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:35,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:35,966 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-20 11:38:35,967 INFO L432 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash 780347803, now seen corresponding path program 5 times [2024-02-20 11:38:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:35,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375548791] [2024-02-20 11:38:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375548791] [2024-02-20 11:38:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375548791] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027038173] [2024-02-20 11:38:36,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:38:36,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:36,061 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) [2024-02-20 11:38:36,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-20 11:38:36,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 11:38:36,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:36,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-20 11:38:36,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:36,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:38:36,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027038173] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:36,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:36,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-20 11:38:36,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180972828] [2024-02-20 11:38:36,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:36,267 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-20 11:38:36,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-20 11:38:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-02-20 11:38:36,267 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:36,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 1858 transitions, 90050 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 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) [2024-02-20 11:38:36,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:36,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:36,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:39,450 INFO L124 PetriNetUnfolderBase]: 2642/5009 cut-off events. [2024-02-20 11:38:39,451 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2024-02-20 11:38:39,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125250 conditions, 5009 events. 2642/5009 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 34369 event pairs, 120 based on Foata normal form. 0/4323 useless extension candidates. Maximal degree in co-relation 67516. Up to 4819 conditions per place. [2024-02-20 11:38:39,500 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 828 selfloop transitions, 3 changer transitions 654/1486 dead transitions. [2024-02-20 11:38:39,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1486 transitions, 74972 flow [2024-02-20 11:38:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-20 11:38:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-20 11:38:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-02-20 11:38:39,501 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.367003367003367 [2024-02-20 11:38:39,502 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2024-02-20 11:38:39,502 INFO L507 AbstractCegarLoop]: Abstraction has has 189 places, 1486 transitions, 74972 flow [2024-02-20 11:38:39,502 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 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) [2024-02-20 11:38:39,502 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:39,502 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:39,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:39,703 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-20 11:38:39,703 INFO L432 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:39,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1178012695, now seen corresponding path program 6 times [2024-02-20 11:38:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:39,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120503061] [2024-02-20 11:38:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:39,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:38:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120503061] [2024-02-20 11:38:39,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120503061] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:39,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114695344] [2024-02-20 11:38:39,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:38:39,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:39,785 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) [2024-02-20 11:38:39,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-20 11:38:39,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-20 11:38:39,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:39,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-20 11:38:39,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:38:39,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:38:40,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114695344] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:40,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:40,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-02-20 11:38:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317729598] [2024-02-20 11:38:40,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:40,039 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-20 11:38:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-20 11:38:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-02-20 11:38:40,040 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:40,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 1486 transitions, 74972 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-02-20 11:38:40,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:40,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:40,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:43,597 INFO L124 PetriNetUnfolderBase]: 3071/5850 cut-off events. [2024-02-20 11:38:43,597 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-02-20 11:38:43,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151734 conditions, 5850 events. 3071/5850 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 41042 event pairs, 120 based on Foata normal form. 0/5004 useless extension candidates. Maximal degree in co-relation 106931. Up to 5643 conditions per place. [2024-02-20 11:38:43,658 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 841 selfloop transitions, 168 changer transitions 665/1675 dead transitions. [2024-02-20 11:38:43,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1675 transitions, 87860 flow [2024-02-20 11:38:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-20 11:38:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-20 11:38:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 327 transitions. [2024-02-20 11:38:43,659 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2024-02-20 11:38:43,660 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2024-02-20 11:38:43,660 INFO L507 AbstractCegarLoop]: Abstraction has has 213 places, 1675 transitions, 87860 flow [2024-02-20 11:38:43,660 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-02-20 11:38:43,660 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:43,660 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:43,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:43,868 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:43,869 INFO L432 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:43,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:43,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1231288335, now seen corresponding path program 7 times [2024-02-20 11:38:43,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:43,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258462973] [2024-02-20 11:38:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:43,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:44,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258462973] [2024-02-20 11:38:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258462973] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908094003] [2024-02-20 11:38:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:38:44,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:44,002 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) [2024-02-20 11:38:44,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-20 11:38:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:44,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 11:38:44,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:44,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908094003] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:44,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:44,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-02-20 11:38:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253415139] [2024-02-20 11:38:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:44,332 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:38:44,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:38:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:38:44,333 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:44,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 1675 transitions, 87860 flow. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 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) [2024-02-20 11:38:44,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:44,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:44,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:47,948 INFO L124 PetriNetUnfolderBase]: 3273/6228 cut-off events. [2024-02-20 11:38:47,948 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-02-20 11:38:47,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167548 conditions, 6228 events. 3273/6228 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 43426 event pairs, 120 based on Foata normal form. 0/5322 useless extension candidates. Maximal degree in co-relation 120670. Up to 6012 conditions per place. [2024-02-20 11:38:48,019 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1009 selfloop transitions, 138 changer transitions 650/1798 dead transitions. [2024-02-20 11:38:48,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1798 transitions, 97904 flow [2024-02-20 11:38:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:38:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:38:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-02-20 11:38:48,020 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-02-20 11:38:48,021 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 200 predicate places. [2024-02-20 11:38:48,021 INFO L507 AbstractCegarLoop]: Abstraction has has 225 places, 1798 transitions, 97904 flow [2024-02-20 11:38:48,021 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 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) [2024-02-20 11:38:48,021 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:48,021 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:48,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-20 11:38:48,221 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-20 11:38:48,222 INFO L432 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:48,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1621701493, now seen corresponding path program 8 times [2024-02-20 11:38:48,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:48,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144839847] [2024-02-20 11:38:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144839847] [2024-02-20 11:38:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144839847] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944897427] [2024-02-20 11:38:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:38:48,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:48,359 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) [2024-02-20 11:38:48,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-20 11:38:48,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:38:48,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:38:48,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-20 11:38:48,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:48,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:38:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944897427] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:48,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-02-20 11:38:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487398945] [2024-02-20 11:38:48,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:48,676 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-20 11:38:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-20 11:38:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2024-02-20 11:38:48,677 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:48,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 1798 transitions, 97904 flow. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 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) [2024-02-20 11:38:48,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:48,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:48,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:52,793 INFO L124 PetriNetUnfolderBase]: 3293/6252 cut-off events. [2024-02-20 11:38:52,793 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2024-02-20 11:38:52,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174284 conditions, 6252 events. 3293/6252 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 43180 event pairs, 120 based on Foata normal form. 0/5332 useless extension candidates. Maximal degree in co-relation 125794. Up to 6032 conditions per place. [2024-02-20 11:38:52,860 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1040 selfloop transitions, 101 changer transitions 638/1780 dead transitions. [2024-02-20 11:38:52,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 1780 transitions, 100463 flow [2024-02-20 11:38:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-20 11:38:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-20 11:38:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-02-20 11:38:52,861 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4131054131054131 [2024-02-20 11:38:52,862 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 212 predicate places. [2024-02-20 11:38:52,862 INFO L507 AbstractCegarLoop]: Abstraction has has 237 places, 1780 transitions, 100463 flow [2024-02-20 11:38:52,862 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 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) [2024-02-20 11:38:52,862 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:52,862 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:52,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:53,062 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-20 11:38:53,063 INFO L432 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:53,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:53,063 INFO L85 PathProgramCache]: Analyzing trace with hash 395330952, now seen corresponding path program 1 times [2024-02-20 11:38:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564077226] [2024-02-20 11:38:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564077226] [2024-02-20 11:38:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564077226] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158122336] [2024-02-20 11:38:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:53,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:53,373 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) [2024-02-20 11:38:53,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-20 11:38:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:53,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:38:53,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:53,556 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:38:53,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-02-20 11:38:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:53,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:53,637 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:38:53,637 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 42 treesize of output 60 [2024-02-20 11:38:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:53,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158122336] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:53,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:53,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-02-20 11:38:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211276575] [2024-02-20 11:38:53,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:53,681 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:38:53,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:38:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:38:53,682 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:53,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1780 transitions, 100463 flow. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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) [2024-02-20 11:38:53,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:53,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:53,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:38:58,010 INFO L124 PetriNetUnfolderBase]: 3526/6680 cut-off events. [2024-02-20 11:38:58,010 INFO L125 PetriNetUnfolderBase]: For 794/794 co-relation queries the response was YES. [2024-02-20 11:38:58,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192870 conditions, 6680 events. 3526/6680 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 46291 event pairs, 120 based on Foata normal form. 0/5728 useless extension candidates. Maximal degree in co-relation 142599. Up to 6458 conditions per place. [2024-02-20 11:38:58,094 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1206 selfloop transitions, 136 changer transitions 638/1981 dead transitions. [2024-02-20 11:38:58,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1981 transitions, 115754 flow [2024-02-20 11:38:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:38:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:38:58,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 201 transitions. [2024-02-20 11:38:58,095 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-02-20 11:38:58,096 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 227 predicate places. [2024-02-20 11:38:58,096 INFO L507 AbstractCegarLoop]: Abstraction has has 252 places, 1981 transitions, 115754 flow [2024-02-20 11:38:58,096 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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) [2024-02-20 11:38:58,096 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:38:58,096 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:38:58,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-20 11:38:58,296 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-20 11:38:58,297 INFO L432 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:38:58,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:38:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1082755497, now seen corresponding path program 1 times [2024-02-20 11:38:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:38:58,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722659979] [2024-02-20 11:38:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:38:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:38:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722659979] [2024-02-20 11:38:58,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722659979] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:38:58,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129053361] [2024-02-20 11:38:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:38:58,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:38:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:38:58,822 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) [2024-02-20 11:38:58,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-20 11:38:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:38:58,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:38:58,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:38:59,016 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-02-20 11:38:59,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-02-20 11:38:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:59,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:38:59,104 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:38:59,104 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 42 treesize of output 60 [2024-02-20 11:38:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:38:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129053361] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:38:59,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:38:59,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-02-20 11:38:59,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183083726] [2024-02-20 11:38:59,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:38:59,148 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:38:59,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:38:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:38:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:38:59,149 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:38:59,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 1981 transitions, 115754 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2024-02-20 11:38:59,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:38:59,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:38:59,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:03,941 INFO L124 PetriNetUnfolderBase]: 3562/6766 cut-off events. [2024-02-20 11:39:03,941 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2024-02-20 11:39:03,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202090 conditions, 6766 events. 3562/6766 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 47198 event pairs, 120 based on Foata normal form. 0/5814 useless extension candidates. Maximal degree in co-relation 150035. Up to 6544 conditions per place. [2024-02-20 11:39:04,021 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1248 selfloop transitions, 65 changer transitions 699/2013 dead transitions. [2024-02-20 11:39:04,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 2013 transitions, 121658 flow [2024-02-20 11:39:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-20 11:39:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-20 11:39:04,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 178 transitions. [2024-02-20 11:39:04,022 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2024-02-20 11:39:04,022 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 241 predicate places. [2024-02-20 11:39:04,022 INFO L507 AbstractCegarLoop]: Abstraction has has 266 places, 2013 transitions, 121658 flow [2024-02-20 11:39:04,023 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2024-02-20 11:39:04,023 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:04,023 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:04,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-20 11:39:04,233 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-20 11:39:04,234 INFO L432 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash -703584343, now seen corresponding path program 2 times [2024-02-20 11:39:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028233082] [2024-02-20 11:39:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028233082] [2024-02-20 11:39:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028233082] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:04,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067083574] [2024-02-20 11:39:04,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:39:04,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:04,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:04,484 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) [2024-02-20 11:39:04,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-20 11:39:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:39:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:04,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:39:04,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:04,741 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-20 11:39:04,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-02-20 11:39:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:39:04,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:04,814 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:39:04,815 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 42 treesize of output 60 [2024-02-20 11:39:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:04,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067083574] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:04,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:04,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 18 [2024-02-20 11:39:04,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713827827] [2024-02-20 11:39:04,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:04,856 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:39:04,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:04,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:39:04,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:39:04,856 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:04,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 2013 transitions, 121658 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2024-02-20 11:39:04,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:04,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:04,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:09,940 INFO L124 PetriNetUnfolderBase]: 3580/6802 cut-off events. [2024-02-20 11:39:09,940 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2024-02-20 11:39:09,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209925 conditions, 6802 events. 3580/6802 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 47634 event pairs, 120 based on Foata normal form. 0/5850 useless extension candidates. Maximal degree in co-relation 156146. Up to 6580 conditions per place. [2024-02-20 11:39:10,050 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1233 selfloop transitions, 74 changer transitions 739/2047 dead transitions. [2024-02-20 11:39:10,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 2047 transitions, 127799 flow [2024-02-20 11:39:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:39:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:39:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 234 transitions. [2024-02-20 11:39:10,051 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-02-20 11:39:10,052 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2024-02-20 11:39:10,052 INFO L507 AbstractCegarLoop]: Abstraction has has 285 places, 2047 transitions, 127799 flow [2024-02-20 11:39:10,052 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2024-02-20 11:39:10,052 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:10,052 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:10,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-20 11:39:10,263 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:10,263 INFO L432 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:10,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1267838273, now seen corresponding path program 3 times [2024-02-20 11:39:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147094689] [2024-02-20 11:39:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147094689] [2024-02-20 11:39:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147094689] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851363799] [2024-02-20 11:39:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:39:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:10,553 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) [2024-02-20 11:39:10,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-20 11:39:10,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:39:10,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:10,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 50 conjunts are in the unsatisfiable core [2024-02-20 11:39:10,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:10,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-02-20 11:39:10,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:39:10,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 11:39:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:39:10,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 11:39:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:39:10,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 11:39:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:39:10,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 11:39:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:39:10,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 11:39:10,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 11:39:10,759 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-20 11:39:10,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-02-20 11:39:10,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-20 11:39:10,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-20 11:39:10,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:10,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:39:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:39:10,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:11,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:11,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-02-20 11:39:11,223 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-02-20 11:39:11,224 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 208 treesize of output 184 [2024-02-20 11:39:11,231 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:39:11,231 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:39:11,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:11,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2024-02-20 11:39:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-20 11:39:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851363799] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:11,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:11,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 30 [2024-02-20 11:39:11,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962425237] [2024-02-20 11:39:11,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:11,421 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-20 11:39:11,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-20 11:39:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=770, Unknown=9, NotChecked=0, Total=930 [2024-02-20 11:39:11,422 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:11,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 2047 transitions, 127799 flow. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 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) [2024-02-20 11:39:11,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:11,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:11,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:20,302 INFO L124 PetriNetUnfolderBase]: 3816/7264 cut-off events. [2024-02-20 11:39:20,303 INFO L125 PetriNetUnfolderBase]: For 876/876 co-relation queries the response was YES. [2024-02-20 11:39:20,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231312 conditions, 7264 events. 3816/7264 cut-off events. For 876/876 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 51709 event pairs, 132 based on Foata normal form. 0/6240 useless extension candidates. Maximal degree in co-relation 175347. Up to 7036 conditions per place. [2024-02-20 11:39:20,443 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1314 selfloop transitions, 87 changer transitions 789/2191 dead transitions. [2024-02-20 11:39:20,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 2191 transitions, 141185 flow [2024-02-20 11:39:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-20 11:39:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-20 11:39:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 310 transitions. [2024-02-20 11:39:20,444 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-02-20 11:39:20,445 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2024-02-20 11:39:20,445 INFO L507 AbstractCegarLoop]: Abstraction has has 312 places, 2191 transitions, 141185 flow [2024-02-20 11:39:20,445 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 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) [2024-02-20 11:39:20,445 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:20,445 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:20,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-20 11:39:20,652 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-02-20 11:39:20,652 INFO L432 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:20,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1131470350, now seen corresponding path program 2 times [2024-02-20 11:39:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:20,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112349116] [2024-02-20 11:39:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:20,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112349116] [2024-02-20 11:39:20,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112349116] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:20,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901600639] [2024-02-20 11:39:20,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:39:20,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:20,920 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) [2024-02-20 11:39:20,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-20 11:39:21,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:39:21,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:21,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:39:21,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:21,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:21,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:39:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:39:21,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:21,278 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:39:21,279 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 42 treesize of output 60 [2024-02-20 11:39:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901600639] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:21,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:21,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2024-02-20 11:39:21,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75577365] [2024-02-20 11:39:21,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:21,330 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-20 11:39:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-20 11:39:21,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-02-20 11:39:21,331 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:21,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 2191 transitions, 141185 flow. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 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) [2024-02-20 11:39:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:21,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:30,580 INFO L124 PetriNetUnfolderBase]: 4635/8865 cut-off events. [2024-02-20 11:39:30,581 INFO L125 PetriNetUnfolderBase]: For 1026/1026 co-relation queries the response was YES. [2024-02-20 11:39:30,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290706 conditions, 8865 events. 4635/8865 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 66198 event pairs, 132 based on Foata normal form. 0/7619 useless extension candidates. Maximal degree in co-relation 230969. Up to 8613 conditions per place. [2024-02-20 11:39:30,730 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1694 selfloop transitions, 214 changer transitions 794/2703 dead transitions. [2024-02-20 11:39:30,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 2703 transitions, 179591 flow [2024-02-20 11:39:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-20 11:39:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-20 11:39:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 393 transitions. [2024-02-20 11:39:30,732 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3830409356725146 [2024-02-20 11:39:30,732 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 324 predicate places. [2024-02-20 11:39:30,733 INFO L507 AbstractCegarLoop]: Abstraction has has 349 places, 2703 transitions, 179591 flow [2024-02-20 11:39:30,733 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 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) [2024-02-20 11:39:30,733 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:30,733 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:30,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-20 11:39:30,933 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:30,934 INFO L432 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:30,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1637816616, now seen corresponding path program 3 times [2024-02-20 11:39:30,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:30,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668658958] [2024-02-20 11:39:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:31,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668658958] [2024-02-20 11:39:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668658958] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559808815] [2024-02-20 11:39:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:39:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:31,448 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) [2024-02-20 11:39:31,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-20 11:39:31,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:39:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:31,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 43 conjunts are in the unsatisfiable core [2024-02-20 11:39:31,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:31,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 11:39:31,760 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-20 11:39:31,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-02-20 11:39:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:39:31,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:31,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:31,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-02-20 11:39:31,932 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:39:31,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-02-20 11:39:31,991 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-02-20 11:39:31,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 195 treesize of output 190 [2024-02-20 11:39:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:39:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559808815] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:32,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:32,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 9] total 25 [2024-02-20 11:39:32,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687936089] [2024-02-20 11:39:32,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:32,224 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-20 11:39:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-20 11:39:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-02-20 11:39:32,225 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:32,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 2703 transitions, 179591 flow. Second operand has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 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) [2024-02-20 11:39:32,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:32,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:32,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:43,006 INFO L124 PetriNetUnfolderBase]: 4774/9105 cut-off events. [2024-02-20 11:39:43,006 INFO L125 PetriNetUnfolderBase]: For 1043/1043 co-relation queries the response was YES. [2024-02-20 11:39:43,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307889 conditions, 9105 events. 4774/9105 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 67837 event pairs, 140 based on Foata normal form. 0/7905 useless extension candidates. Maximal degree in co-relation 246844. Up to 8860 conditions per place. [2024-02-20 11:39:43,332 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1830 selfloop transitions, 204 changer transitions 830/2865 dead transitions. [2024-02-20 11:39:43,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 2865 transitions, 196065 flow [2024-02-20 11:39:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-20 11:39:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-20 11:39:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 415 transitions. [2024-02-20 11:39:43,333 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.41541541541541543 [2024-02-20 11:39:43,334 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 360 predicate places. [2024-02-20 11:39:43,334 INFO L507 AbstractCegarLoop]: Abstraction has has 385 places, 2865 transitions, 196065 flow [2024-02-20 11:39:43,334 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 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) [2024-02-20 11:39:43,334 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:43,334 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:43,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-02-20 11:39:43,545 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:43,545 INFO L432 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:43,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1169835600, now seen corresponding path program 4 times [2024-02-20 11:39:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:43,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432896424] [2024-02-20 11:39:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432896424] [2024-02-20 11:39:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432896424] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223142595] [2024-02-20 11:39:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:39:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:43,757 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) [2024-02-20 11:39:43,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-20 11:39:43,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:39:43,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:43,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:39:43,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:43,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:43,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-02-20 11:39:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:43,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:44,084 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:39:44,085 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 42 treesize of output 60 [2024-02-20 11:39:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:44,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223142595] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:44,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-02-20 11:39:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730962340] [2024-02-20 11:39:44,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:44,127 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:39:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:39:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:39:44,128 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:44,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 2865 transitions, 196065 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2024-02-20 11:39:44,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:44,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:44,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:39:54,481 INFO L124 PetriNetUnfolderBase]: 4478/8429 cut-off events. [2024-02-20 11:39:54,481 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-02-20 11:39:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293881 conditions, 8429 events. 4478/8429 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 61062 event pairs, 120 based on Foata normal form. 0/7325 useless extension candidates. Maximal degree in co-relation 232492. Up to 8204 conditions per place. [2024-02-20 11:39:54,602 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1682 selfloop transitions, 212 changer transitions 862/2757 dead transitions. [2024-02-20 11:39:54,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 2757 transitions, 194161 flow [2024-02-20 11:39:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:39:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:39:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 284 transitions. [2024-02-20 11:39:54,603 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3895747599451303 [2024-02-20 11:39:54,604 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 385 predicate places. [2024-02-20 11:39:54,604 INFO L507 AbstractCegarLoop]: Abstraction has has 410 places, 2757 transitions, 194161 flow [2024-02-20 11:39:54,604 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2024-02-20 11:39:54,604 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:39:54,604 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:39:54,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-20 11:39:54,809 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:54,809 INFO L432 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:39:54,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:39:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1243851817, now seen corresponding path program 4 times [2024-02-20 11:39:54,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:39:54,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086875799] [2024-02-20 11:39:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:39:54,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:39:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:39:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:39:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:39:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086875799] [2024-02-20 11:39:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086875799] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:39:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004875379] [2024-02-20 11:39:55,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:39:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:39:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:39:55,018 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) [2024-02-20 11:39:55,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-20 11:39:55,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:39:55,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:39:55,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:39:55,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:39:55,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-02-20 11:39:55,270 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:55,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-02-20 11:39:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:39:55,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:39:55,442 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:39:55,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-02-20 11:39:55,451 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:39:55,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-02-20 11:39:55,515 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-02-20 11:39:55,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 190 treesize of output 185 [2024-02-20 11:39:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:39:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004875379] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:39:55,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:39:55,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2024-02-20 11:39:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653942406] [2024-02-20 11:39:55,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:39:55,731 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:39:55,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:39:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:39:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:39:55,732 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:39:55,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 2757 transitions, 194161 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 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) [2024-02-20 11:39:55,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:39:55,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:39:55,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:40:06,602 INFO L124 PetriNetUnfolderBase]: 4400/8273 cut-off events. [2024-02-20 11:40:06,602 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2024-02-20 11:40:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296764 conditions, 8273 events. 4400/8273 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 59515 event pairs, 120 based on Foata normal form. 0/7207 useless extension candidates. Maximal degree in co-relation 233927. Up to 8052 conditions per place. [2024-02-20 11:40:06,962 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1765 selfloop transitions, 94 changer transitions 863/2723 dead transitions. [2024-02-20 11:40:06,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 2723 transitions, 197192 flow [2024-02-20 11:40:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:40:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:40:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 249 transitions. [2024-02-20 11:40:06,963 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-02-20 11:40:06,963 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 404 predicate places. [2024-02-20 11:40:06,963 INFO L507 AbstractCegarLoop]: Abstraction has has 429 places, 2723 transitions, 197192 flow [2024-02-20 11:40:06,963 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 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) [2024-02-20 11:40:06,963 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:40:06,963 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:40:06,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-20 11:40:07,164 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:40:07,164 INFO L432 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:40:07,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:40:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1842155112, now seen corresponding path program 5 times [2024-02-20 11:40:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:40:07,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113202932] [2024-02-20 11:40:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:40:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:40:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:40:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:40:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113202932] [2024-02-20 11:40:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113202932] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:40:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843312604] [2024-02-20 11:40:07,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:40:07,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:40:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:40:07,405 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) [2024-02-20 11:40:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-20 11:40:07,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:40:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:40:07,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:40:07,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:40:07,606 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-02-20 11:40:07,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-02-20 11:40:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:07,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:40:07,675 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:40:07,676 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 40 treesize of output 56 [2024-02-20 11:40:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:07,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843312604] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:40:07,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:40:07,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-02-20 11:40:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529019816] [2024-02-20 11:40:07,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:40:07,713 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:40:07,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:40:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:40:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:40:07,715 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:40:07,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 2723 transitions, 197192 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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) [2024-02-20 11:40:07,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:40:07,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:40:07,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:40:18,138 INFO L124 PetriNetUnfolderBase]: 4408/8289 cut-off events. [2024-02-20 11:40:18,138 INFO L125 PetriNetUnfolderBase]: For 917/917 co-relation queries the response was YES. [2024-02-20 11:40:18,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305580 conditions, 8289 events. 4408/8289 cut-off events. For 917/917 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 59622 event pairs, 120 based on Foata normal form. 0/7223 useless extension candidates. Maximal degree in co-relation 241007. Up to 8068 conditions per place. [2024-02-20 11:40:18,265 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1758 selfloop transitions, 101 changer transitions 896/2756 dead transitions. [2024-02-20 11:40:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 2756 transitions, 205090 flow [2024-02-20 11:40:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:40:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:40:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 204 transitions. [2024-02-20 11:40:18,266 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:40:18,267 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 420 predicate places. [2024-02-20 11:40:18,267 INFO L507 AbstractCegarLoop]: Abstraction has has 445 places, 2756 transitions, 205090 flow [2024-02-20 11:40:18,267 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 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) [2024-02-20 11:40:18,267 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:40:18,267 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:40:18,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-02-20 11:40:18,478 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-02-20 11:40:18,478 INFO L432 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:40:18,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:40:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -864154601, now seen corresponding path program 5 times [2024-02-20 11:40:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:40:18,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662951510] [2024-02-20 11:40:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:40:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:40:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:40:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:40:18,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662951510] [2024-02-20 11:40:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662951510] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:40:18,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648163837] [2024-02-20 11:40:18,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:40:18,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:40:18,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:40:18,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:40:18,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-20 11:40:18,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-20 11:40:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:40:18,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2024-02-20 11:40:18,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:40:18,934 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:40:18,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-02-20 11:40:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:18,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:40:19,012 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:40:19,012 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 40 treesize of output 56 [2024-02-20 11:40:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:19,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648163837] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:40:19,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:40:19,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-02-20 11:40:19,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476894793] [2024-02-20 11:40:19,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:40:19,211 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:40:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:40:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:40:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:40:19,212 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:40:19,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 2756 transitions, 205090 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 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) [2024-02-20 11:40:19,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:40:19,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:40:19,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:40:32,866 INFO L124 PetriNetUnfolderBase]: 4732/8893 cut-off events. [2024-02-20 11:40:32,867 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-02-20 11:40:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336479 conditions, 8893 events. 4732/8893 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 65123 event pairs, 132 based on Foata normal form. 0/7707 useless extension candidates. Maximal degree in co-relation 269429. Up to 8663 conditions per place. [2024-02-20 11:40:33,014 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1855 selfloop transitions, 140 changer transitions 903/2899 dead transitions. [2024-02-20 11:40:33,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 2899 transitions, 221531 flow [2024-02-20 11:40:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-20 11:40:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-20 11:40:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 210 transitions. [2024-02-20 11:40:33,015 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-02-20 11:40:33,015 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 435 predicate places. [2024-02-20 11:40:33,016 INFO L507 AbstractCegarLoop]: Abstraction has has 460 places, 2899 transitions, 221531 flow [2024-02-20 11:40:33,016 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 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) [2024-02-20 11:40:33,016 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:40:33,016 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:40:33,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-02-20 11:40:33,216 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-02-20 11:40:33,217 INFO L432 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:40:33,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:40:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1710104101, now seen corresponding path program 6 times [2024-02-20 11:40:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:40:33,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274415597] [2024-02-20 11:40:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:40:33,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:40:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:40:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:33,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:40:33,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274415597] [2024-02-20 11:40:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274415597] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:40:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776738522] [2024-02-20 11:40:33,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:40:33,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:40:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:40:33,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:40:33,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-20 11:40:33,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:40:33,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:40:33,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:40:33,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:40:33,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:40:33,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:40:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:33,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:40:33,951 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:40:33,951 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 40 treesize of output 56 [2024-02-20 11:40:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776738522] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:40:33,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:40:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2024-02-20 11:40:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602983164] [2024-02-20 11:40:33,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:40:33,990 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:40:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:40:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:40:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:40:33,991 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:40:33,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 2899 transitions, 221531 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 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) [2024-02-20 11:40:33,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:40:33,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:40:33,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:40:49,658 INFO L124 PetriNetUnfolderBase]: 4972/9344 cut-off events. [2024-02-20 11:40:49,659 INFO L125 PetriNetUnfolderBase]: For 1049/1049 co-relation queries the response was YES. [2024-02-20 11:40:49,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362704 conditions, 9344 events. 4972/9344 cut-off events. For 1049/1049 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 69279 event pairs, 132 based on Foata normal form. 0/8078 useless extension candidates. Maximal degree in co-relation 293379. Up to 9108 conditions per place. [2024-02-20 11:40:49,800 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1954 selfloop transitions, 139 changer transitions 921/3015 dead transitions. [2024-02-20 11:40:49,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 3015 transitions, 236423 flow [2024-02-20 11:40:49,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:40:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:40:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 240 transitions. [2024-02-20 11:40:49,802 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-02-20 11:40:49,802 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 455 predicate places. [2024-02-20 11:40:49,802 INFO L507 AbstractCegarLoop]: Abstraction has has 480 places, 3015 transitions, 236423 flow [2024-02-20 11:40:49,802 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 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) [2024-02-20 11:40:49,802 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:40:49,802 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:40:49,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-02-20 11:40:50,012 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-20 11:40:50,012 INFO L432 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:40:50,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:40:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1846472024, now seen corresponding path program 6 times [2024-02-20 11:40:50,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:40:50,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248263480] [2024-02-20 11:40:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:40:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:40:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:40:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:50,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:40:50,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248263480] [2024-02-20 11:40:50,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248263480] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:40:50,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339154094] [2024-02-20 11:40:50,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:40:50,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:40:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:40:50,236 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:40:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-20 11:40:50,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:40:50,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:40:50,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:40:50,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:40:50,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:40:50,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:40:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:40:50,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:40:50,606 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:40:50,606 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 40 treesize of output 56 [2024-02-20 11:40:50,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:40:50,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339154094] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:40:50,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:40:50,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 19 [2024-02-20 11:40:50,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055739637] [2024-02-20 11:40:50,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:40:50,640 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:40:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:40:50,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:40:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:40:50,641 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:40:50,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 3015 transitions, 236423 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:40:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:40:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:40:50,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:41:07,952 INFO L124 PetriNetUnfolderBase]: 5024/9504 cut-off events. [2024-02-20 11:41:07,952 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-02-20 11:41:07,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378244 conditions, 9504 events. 5024/9504 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 71192 event pairs, 144 based on Foata normal form. 0/8262 useless extension candidates. Maximal degree in co-relation 306823. Up to 9264 conditions per place. [2024-02-20 11:41:08,106 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 2008 selfloop transitions, 122 changer transitions 922/3053 dead transitions. [2024-02-20 11:41:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 3053 transitions, 245515 flow [2024-02-20 11:41:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-20 11:41:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-20 11:41:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2024-02-20 11:41:08,108 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-02-20 11:41:08,110 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 476 predicate places. [2024-02-20 11:41:08,110 INFO L507 AbstractCegarLoop]: Abstraction has has 501 places, 3053 transitions, 245515 flow [2024-02-20 11:41:08,110 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:41:08,110 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:41:08,110 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:41:08,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-20 11:41:08,320 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-20 11:41:08,320 INFO L432 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:41:08,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:41:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 147189322, now seen corresponding path program 7 times [2024-02-20 11:41:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:41:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859423193] [2024-02-20 11:41:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:41:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:41:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:08,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:41:08,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859423193] [2024-02-20 11:41:08,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859423193] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:41:08,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453588832] [2024-02-20 11:41:08,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:41:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:41:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:41:08,533 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:41:08,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-20 11:41:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:08,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:41:08,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:41:08,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:08,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-02-20 11:41:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:08,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:41:08,792 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:41:08,792 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 40 treesize of output 56 [2024-02-20 11:41:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453588832] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:41:08,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:41:08,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2024-02-20 11:41:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218140291] [2024-02-20 11:41:08,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:41:08,826 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:41:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:41:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:41:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:41:08,827 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:41:08,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 3053 transitions, 245515 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-02-20 11:41:08,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:41:08,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:41:08,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:41:25,145 INFO L124 PetriNetUnfolderBase]: 4876/9166 cut-off events. [2024-02-20 11:41:25,145 INFO L125 PetriNetUnfolderBase]: For 1075/1075 co-relation queries the response was YES. [2024-02-20 11:41:25,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374192 conditions, 9166 events. 4876/9166 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 67635 event pairs, 132 based on Foata normal form. 0/7972 useless extension candidates. Maximal degree in co-relation 301835. Up to 8936 conditions per place. [2024-02-20 11:41:25,296 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 1958 selfloop transitions, 122 changer transitions 938/3019 dead transitions. [2024-02-20 11:41:25,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 3019 transitions, 248801 flow [2024-02-20 11:41:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:41:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:41:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 289 transitions. [2024-02-20 11:41:25,297 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39643347050754457 [2024-02-20 11:41:25,298 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 502 predicate places. [2024-02-20 11:41:25,298 INFO L507 AbstractCegarLoop]: Abstraction has has 527 places, 3019 transitions, 248801 flow [2024-02-20 11:41:25,298 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-02-20 11:41:25,298 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:41:25,298 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:41:25,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-02-20 11:41:25,499 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-20 11:41:25,499 INFO L432 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:41:25,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:41:25,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1734090557, now seen corresponding path program 7 times [2024-02-20 11:41:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:41:25,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248296840] [2024-02-20 11:41:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:41:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:41:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:25,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:41:25,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248296840] [2024-02-20 11:41:25,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248296840] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:41:25,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649257060] [2024-02-20 11:41:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:41:25,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:41:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:41:25,690 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:41:25,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-20 11:41:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:25,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:41:25,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:41:25,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:25,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-02-20 11:41:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:25,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:41:25,944 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:41:25,945 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 40 treesize of output 56 [2024-02-20 11:41:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:25,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649257060] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:41:25,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:41:25,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-02-20 11:41:25,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003301144] [2024-02-20 11:41:25,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:41:25,980 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:41:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:41:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:41:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:41:25,981 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:41:25,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 3019 transitions, 248801 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 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) [2024-02-20 11:41:25,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:41:25,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:41:25,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:41:39,343 INFO L124 PetriNetUnfolderBase]: 4798/9016 cut-off events. [2024-02-20 11:41:39,343 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2024-02-20 11:41:39,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377148 conditions, 9016 events. 4798/9016 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 66234 event pairs, 132 based on Foata normal form. 0/7866 useless extension candidates. Maximal degree in co-relation 303379. Up to 8790 conditions per place. [2024-02-20 11:41:39,497 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1918 selfloop transitions, 140 changer transitions 938/2997 dead transitions. [2024-02-20 11:41:39,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2997 transitions, 252965 flow [2024-02-20 11:41:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-20 11:41:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-20 11:41:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 235 transitions. [2024-02-20 11:41:39,498 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2024-02-20 11:41:39,498 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 520 predicate places. [2024-02-20 11:41:39,498 INFO L507 AbstractCegarLoop]: Abstraction has has 545 places, 2997 transitions, 252965 flow [2024-02-20 11:41:39,498 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 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) [2024-02-20 11:41:39,498 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:41:39,498 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:41:39,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-02-20 11:41:39,698 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-02-20 11:41:39,699 INFO L432 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:41:39,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:41:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1544627397, now seen corresponding path program 8 times [2024-02-20 11:41:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:41:39,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804176549] [2024-02-20 11:41:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:41:39,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:41:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:40,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:41:40,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804176549] [2024-02-20 11:41:40,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804176549] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:41:40,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682497169] [2024-02-20 11:41:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:41:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:41:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:41:40,085 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:41:40,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-20 11:41:40,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:41:40,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:41:40,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:41:40,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:41:40,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:40,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:41:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:41:40,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:41:40,389 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:41:40,389 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 40 treesize of output 56 [2024-02-20 11:41:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:41:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682497169] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:41:40,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:41:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2024-02-20 11:41:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773291246] [2024-02-20 11:41:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:41:40,430 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 11:41:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:41:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 11:41:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-02-20 11:41:40,431 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:41:40,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 2997 transitions, 252965 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2024-02-20 11:41:40,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:41:40,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:41:40,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:41:57,064 INFO L124 PetriNetUnfolderBase]: 4901/9203 cut-off events. [2024-02-20 11:41:57,064 INFO L125 PetriNetUnfolderBase]: For 1026/1026 co-relation queries the response was YES. [2024-02-20 11:41:57,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394120 conditions, 9203 events. 4901/9203 cut-off events. For 1026/1026 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 67350 event pairs, 120 based on Foata normal form. 0/8023 useless extension candidates. Maximal degree in co-relation 318471. Up to 8976 conditions per place. [2024-02-20 11:41:57,249 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 1976 selfloop transitions, 126 changer transitions 970/3073 dead transitions. [2024-02-20 11:41:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 3073 transitions, 265520 flow [2024-02-20 11:41:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:41:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:41:57,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 279 transitions. [2024-02-20 11:41:57,256 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2024-02-20 11:41:57,261 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 542 predicate places. [2024-02-20 11:41:57,261 INFO L507 AbstractCegarLoop]: Abstraction has has 567 places, 3073 transitions, 265520 flow [2024-02-20 11:41:57,261 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2024-02-20 11:41:57,261 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:41:57,261 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:41:57,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-02-20 11:41:57,473 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:41:57,474 INFO L432 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:41:57,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:41:57,474 INFO L85 PathProgramCache]: Analyzing trace with hash -180568685, now seen corresponding path program 9 times [2024-02-20 11:41:57,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:41:57,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490370171] [2024-02-20 11:41:57,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:41:57,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:41:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:41:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:41:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:41:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490370171] [2024-02-20 11:41:57,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490370171] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:41:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773224609] [2024-02-20 11:41:57,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:41:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:41:57,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:41:57,766 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:41:57,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-20 11:41:57,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-20 11:41:57,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:41:57,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 57 conjunts are in the unsatisfiable core [2024-02-20 11:41:57,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:41:57,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-02-20 11:41:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:41:57,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-02-20 11:41:57,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:41:57,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 11:41:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:41:57,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 11:41:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:41:57,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-02-20 11:41:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-02-20 11:41:57,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-02-20 11:41:57,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 11:41:58,000 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-02-20 11:41:58,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-02-20 11:41:58,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-20 11:41:58,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 11:41:58,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2024-02-20 11:41:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:41:58,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:41:58,451 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-02-20 11:41:58,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-02-20 11:41:58,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:58,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2024-02-20 11:41:58,688 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:41:58,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 75 [2024-02-20 11:41:58,691 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:41:58,715 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-02-20 11:41:58,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 78 [2024-02-20 11:41:58,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:58,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2024-02-20 11:41:58,774 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-20 11:41:58,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 61 [2024-02-20 11:41:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:41:58,801 INFO L349 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2024-02-20 11:41:58,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 72 [2024-02-20 11:41:58,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:58,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2024-02-20 11:41:58,850 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:41:58,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 90 [2024-02-20 11:41:58,853 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:41:58,878 INFO L349 Elim1Store]: treesize reduction 8, result has 83.0 percent of original size [2024-02-20 11:41:58,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 87 [2024-02-20 11:41:58,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:41:58,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 73 [2024-02-20 11:41:58,929 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:41:58,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 101 [2024-02-20 11:41:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:41:58,934 INFO L173 IndexEqualityManager]: detected equality via solver [2024-02-20 11:41:58,977 INFO L349 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2024-02-20 11:41:58,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 125 [2024-02-20 11:41:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:41:59,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773224609] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:41:59,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:41:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 30 [2024-02-20 11:41:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186354402] [2024-02-20 11:41:59,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:41:59,207 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-02-20 11:41:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:41:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-02-20 11:41:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=736, Unknown=9, NotChecked=0, Total=930 [2024-02-20 11:41:59,208 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:41:59,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 3073 transitions, 265520 flow. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 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) [2024-02-20 11:41:59,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:41:59,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:41:59,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:42:19,140 INFO L124 PetriNetUnfolderBase]: 5807/10873 cut-off events. [2024-02-20 11:42:19,140 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2024-02-20 11:42:19,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476000 conditions, 10873 events. 5807/10873 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 82265 event pairs, 120 based on Foata normal form. 0/9347 useless extension candidates. Maximal degree in co-relation 396440. Up to 10626 conditions per place. [2024-02-20 11:42:19,527 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 2379 selfloop transitions, 96 changer transitions 1005/3481 dead transitions. [2024-02-20 11:42:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3481 transitions, 307754 flow [2024-02-20 11:42:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-20 11:42:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-20 11:42:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 276 transitions. [2024-02-20 11:42:19,528 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-02-20 11:42:19,529 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 564 predicate places. [2024-02-20 11:42:19,529 INFO L507 AbstractCegarLoop]: Abstraction has has 589 places, 3481 transitions, 307754 flow [2024-02-20 11:42:19,529 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 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) [2024-02-20 11:42:19,529 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:42:19,529 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:42:19,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-02-20 11:42:19,743 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:42:19,743 INFO L432 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:42:19,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:42:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 172077929, now seen corresponding path program 10 times [2024-02-20 11:42:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:42:19,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256637902] [2024-02-20 11:42:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:42:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:42:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:42:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:42:19,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:42:19,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256637902] [2024-02-20 11:42:19,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256637902] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:42:19,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147421862] [2024-02-20 11:42:19,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:42:19,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:42:19,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:42:19,981 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:42:19,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-02-20 11:42:20,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:42:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:42:20,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:42:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:42:20,246 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-02-20 11:42:20,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2024-02-20 11:42:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:42:20,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:42:20,319 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:42:20,319 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 42 treesize of output 60 [2024-02-20 11:42:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:42:20,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147421862] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:42:20,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:42:20,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 19 [2024-02-20 11:42:20,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499767991] [2024-02-20 11:42:20,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:42:20,357 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:42:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:42:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:42:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:42:20,357 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:42:20,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 3481 transitions, 307754 flow. Second operand has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 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) [2024-02-20 11:42:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:42:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:42:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:42:49,681 INFO L124 PetriNetUnfolderBase]: 6203/11631 cut-off events. [2024-02-20 11:42:49,682 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2024-02-20 11:42:49,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520436 conditions, 11631 events. 6203/11631 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 89344 event pairs, 120 based on Foata normal form. 0/9961 useless extension candidates. Maximal degree in co-relation 437881. Up to 11372 conditions per place. [2024-02-20 11:42:49,899 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 2570 selfloop transitions, 149 changer transitions 1019/3739 dead transitions. [2024-02-20 11:42:49,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 3739 transitions, 338054 flow [2024-02-20 11:42:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:42:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:42:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 201 transitions. [2024-02-20 11:42:49,900 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-02-20 11:42:49,901 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 580 predicate places. [2024-02-20 11:42:49,901 INFO L507 AbstractCegarLoop]: Abstraction has has 605 places, 3739 transitions, 338054 flow [2024-02-20 11:42:49,901 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.55) internal successors, (111), 20 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) [2024-02-20 11:42:49,901 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:42:49,901 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:42:49,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-02-20 11:42:50,115 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-02-20 11:42:50,116 INFO L432 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:42:50,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:42:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 256790697, now seen corresponding path program 11 times [2024-02-20 11:42:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:42:50,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698780069] [2024-02-20 11:42:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:42:50,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:42:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:42:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:42:50,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:42:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698780069] [2024-02-20 11:42:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698780069] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:42:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116009300] [2024-02-20 11:42:50,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:42:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:42:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:42:50,346 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:42:50,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-02-20 11:42:50,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:42:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:42:50,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-20 11:42:50,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:42:50,571 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-02-20 11:42:50,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 20 [2024-02-20 11:42:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:42:50,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:42:50,630 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:42:50,631 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 40 treesize of output 56 [2024-02-20 11:42:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:42:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116009300] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:42:50,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:42:50,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 17 [2024-02-20 11:42:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847187873] [2024-02-20 11:42:50,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:42:50,666 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-20 11:42:50,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:42:50,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-20 11:42:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-02-20 11:42:50,666 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:42:50,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 3739 transitions, 338054 flow. Second operand has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 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) [2024-02-20 11:42:50,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:42:50,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:42:50,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:43:23,685 INFO L124 PetriNetUnfolderBase]: 6221/11667 cut-off events. [2024-02-20 11:43:23,686 INFO L125 PetriNetUnfolderBase]: For 1364/1364 co-relation queries the response was YES. [2024-02-20 11:43:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533639 conditions, 11667 events. 6221/11667 cut-off events. For 1364/1364 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 89554 event pairs, 132 based on Foata normal form. 0/9997 useless extension candidates. Maximal degree in co-relation 449259. Up to 11408 conditions per place. [2024-02-20 11:43:23,937 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 2617 selfloop transitions, 100 changer transitions 1066/3784 dead transitions. [2024-02-20 11:43:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 3784 transitions, 349679 flow [2024-02-20 11:43:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:43:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:43:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2024-02-20 11:43:23,938 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2024-02-20 11:43:23,938 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 596 predicate places. [2024-02-20 11:43:23,939 INFO L507 AbstractCegarLoop]: Abstraction has has 621 places, 3784 transitions, 349679 flow [2024-02-20 11:43:23,939 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 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) [2024-02-20 11:43:23,939 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:43:23,939 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:43:23,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-02-20 11:43:24,151 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:43:24,151 INFO L432 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:43:24,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:43:24,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1448025863, now seen corresponding path program 12 times [2024-02-20 11:43:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:43:24,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123188368] [2024-02-20 11:43:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:43:24,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:43:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:43:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:43:24,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:43:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123188368] [2024-02-20 11:43:24,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123188368] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:43:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501629894] [2024-02-20 11:43:24,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:43:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:43:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:43:24,533 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:43:24,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-02-20 11:43:24,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-20 11:43:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:43:24,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-20 11:43:24,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:43:24,811 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-02-20 11:43:24,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-02-20 11:43:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:43:24,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:43:24,897 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:43:24,897 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 42 treesize of output 60 [2024-02-20 11:43:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:43:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501629894] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:43:24,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:43:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-02-20 11:43:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520521810] [2024-02-20 11:43:24,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:43:24,947 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:43:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:43:24,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:43:24,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:43:24,948 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:43:24,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 3784 transitions, 349679 flow. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 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) [2024-02-20 11:43:24,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:43:24,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:43:24,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:02,480 INFO L124 PetriNetUnfolderBase]: 6713/12554 cut-off events. [2024-02-20 11:44:02,480 INFO L125 PetriNetUnfolderBase]: For 1471/1471 co-relation queries the response was YES. [2024-02-20 11:44:02,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586538 conditions, 12554 events. 6713/12554 cut-off events. For 1471/1471 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 96988 event pairs, 162 based on Foata normal form. 0/10720 useless extension candidates. Maximal degree in co-relation 499373. Up to 12286 conditions per place. [2024-02-20 11:44:02,750 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 2702 selfloop transitions, 253 changer transitions 1109/4065 dead transitions. [2024-02-20 11:44:02,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 4065 transitions, 383749 flow [2024-02-20 11:44:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-20 11:44:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-20 11:44:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 349 transitions. [2024-02-20 11:44:02,751 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4308641975308642 [2024-02-20 11:44:02,751 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 625 predicate places. [2024-02-20 11:44:02,751 INFO L507 AbstractCegarLoop]: Abstraction has has 650 places, 4065 transitions, 383749 flow [2024-02-20 11:44:02,752 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 17 states have internal predecessors, (96), 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) [2024-02-20 11:44:02,752 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:02,752 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:02,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:02,960 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-02-20 11:44:02,960 INFO L432 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:02,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2091845390, now seen corresponding path program 8 times [2024-02-20 11:44:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346018987] [2024-02-20 11:44:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:44:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346018987] [2024-02-20 11:44:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346018987] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561361351] [2024-02-20 11:44:03,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:44:03,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:03,148 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:03,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-02-20 11:44:03,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:44:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:44:03,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:44:03,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:03,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:44:03,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:44:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:44:03,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:44:03,440 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:44:03,441 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 40 treesize of output 56 [2024-02-20 11:44:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:44:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561361351] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:44:03,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:44:03,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 15 [2024-02-20 11:44:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427407619] [2024-02-20 11:44:03,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:44:03,475 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-20 11:44:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-20 11:44:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-02-20 11:44:03,476 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:44:03,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 4065 transitions, 383749 flow. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2024-02-20 11:44:03,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:03,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:44:03,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:44:47,304 INFO L124 PetriNetUnfolderBase]: 7134/13359 cut-off events. [2024-02-20 11:44:47,305 INFO L125 PetriNetUnfolderBase]: For 1523/1523 co-relation queries the response was YES. [2024-02-20 11:44:47,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637034 conditions, 13359 events. 7134/13359 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 104793 event pairs, 174 based on Foata normal form. 0/11377 useless extension candidates. Maximal degree in co-relation 546652. Up to 13077 conditions per place. [2024-02-20 11:44:47,594 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 2987 selfloop transitions, 182 changer transitions 1112/4282 dead transitions. [2024-02-20 11:44:47,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 4282 transitions, 412799 flow [2024-02-20 11:44:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-20 11:44:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-20 11:44:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 246 transitions. [2024-02-20 11:44:47,595 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-02-20 11:44:47,595 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 645 predicate places. [2024-02-20 11:44:47,595 INFO L507 AbstractCegarLoop]: Abstraction has has 670 places, 4282 transitions, 412799 flow [2024-02-20 11:44:47,595 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 16 states have internal predecessors, (92), 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) [2024-02-20 11:44:47,595 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:44:47,595 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:44:47,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-02-20 11:44:47,804 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:47,804 INFO L432 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:44:47,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:44:47,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1611423340, now seen corresponding path program 9 times [2024-02-20 11:44:47,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:44:47,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661019318] [2024-02-20 11:44:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:44:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:44:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:44:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:44:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:44:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661019318] [2024-02-20 11:44:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661019318] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:44:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446610156] [2024-02-20 11:44:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-20 11:44:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:44:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:44:48,036 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:44:48,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-02-20 11:44:48,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-20 11:44:48,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:44:48,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2024-02-20 11:44:48,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:44:48,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-02-20 11:44:48,427 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-02-20 11:44:48,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-02-20 11:44:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-20 11:44:48,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:44:48,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:44:48,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2024-02-20 11:44:48,703 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-02-20 11:44:48,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2024-02-20 11:44:48,746 INFO L349 Elim1Store]: treesize reduction 15, result has 78.9 percent of original size [2024-02-20 11:44:48,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 187 treesize of output 190 [2024-02-20 11:44:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-20 11:44:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446610156] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:44:49,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:44:49,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2024-02-20 11:44:49,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531671457] [2024-02-20 11:44:49,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:44:49,217 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-02-20 11:44:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:44:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-02-20 11:44:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2024-02-20 11:44:49,218 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:44:49,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 4282 transitions, 412799 flow. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 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) [2024-02-20 11:44:49,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:44:49,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:44:49,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:45:43,701 INFO L124 PetriNetUnfolderBase]: 8342/15582 cut-off events. [2024-02-20 11:45:43,701 INFO L125 PetriNetUnfolderBase]: For 1706/1706 co-relation queries the response was YES. [2024-02-20 11:45:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758707 conditions, 15582 events. 8342/15582 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 124979 event pairs, 198 based on Foata normal form. 8/13287 useless extension candidates. Maximal degree in co-relation 570388. Up to 15284 conditions per place. [2024-02-20 11:45:44,071 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 3464 selfloop transitions, 164 changer transitions 1413/5042 dead transitions. [2024-02-20 11:45:44,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 5042 transitions, 496057 flow [2024-02-20 11:45:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-20 11:45:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-20 11:45:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 324 transitions. [2024-02-20 11:45:44,072 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-02-20 11:45:44,072 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 680 predicate places. [2024-02-20 11:45:44,072 INFO L507 AbstractCegarLoop]: Abstraction has has 705 places, 5042 transitions, 496057 flow [2024-02-20 11:45:44,072 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 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) [2024-02-20 11:45:44,073 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:45:44,073 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:45:44,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-02-20 11:45:44,285 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-02-20 11:45:44,285 INFO L432 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:45:44,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:45:44,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1769226268, now seen corresponding path program 10 times [2024-02-20 11:45:44,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:45:44,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851455128] [2024-02-20 11:45:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:45:44,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:45:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:45:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:45:44,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:45:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851455128] [2024-02-20 11:45:44,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851455128] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:45:44,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785801483] [2024-02-20 11:45:44,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-20 11:45:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:45:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:45:44,681 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:45:44,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-02-20 11:45:44,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-20 11:45:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:45:44,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-20 11:45:44,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:45:44,953 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-02-20 11:45:44,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-02-20 11:45:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:45:44,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:45:45,015 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:45:45,015 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 40 treesize of output 56 [2024-02-20 11:45:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:45:45,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785801483] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:45:45,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:45:45,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-02-20 11:45:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308159924] [2024-02-20 11:45:45,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:45:45,059 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-20 11:45:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:45:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-20 11:45:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-02-20 11:45:45,060 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:45:45,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 5042 transitions, 496057 flow. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:45:45,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:45:45,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:45:45,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:46:52,800 INFO L124 PetriNetUnfolderBase]: 8452/15792 cut-off events. [2024-02-20 11:46:52,800 INFO L125 PetriNetUnfolderBase]: For 1745/1745 co-relation queries the response was YES. [2024-02-20 11:46:52,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784680 conditions, 15792 events. 8452/15792 cut-off events. For 1745/1745 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 127197 event pairs, 192 based on Foata normal form. 0/13453 useless extension candidates. Maximal degree in co-relation 591926. Up to 15494 conditions per place. [2024-02-20 11:46:53,161 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 3468 selfloop transitions, 176 changer transitions 1471/5116 dead transitions. [2024-02-20 11:46:53,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 5116 transitions, 513569 flow [2024-02-20 11:46:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-20 11:46:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-20 11:46:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 205 transitions. [2024-02-20 11:46:53,169 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2024-02-20 11:46:53,169 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 696 predicate places. [2024-02-20 11:46:53,169 INFO L507 AbstractCegarLoop]: Abstraction has has 721 places, 5116 transitions, 513569 flow [2024-02-20 11:46:53,169 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:46:53,169 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:46:53,169 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:46:53,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-02-20 11:46:53,370 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-02-20 11:46:53,370 INFO L432 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:46:53,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:46:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1887377269, now seen corresponding path program 13 times [2024-02-20 11:46:53,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:46:53,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33306974] [2024-02-20 11:46:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:46:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:46:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:46:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:46:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33306974] [2024-02-20 11:46:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33306974] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:46:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128778708] [2024-02-20 11:46:53,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-20 11:46:53,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:46:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:46:53,573 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:46:53,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-02-20 11:46:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:46:53,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-20 11:46:53,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:46:53,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:46:53,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-02-20 11:46:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:46:53,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:46:53,843 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:46:53,844 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 40 treesize of output 56 [2024-02-20 11:46:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:46:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128778708] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:46:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:46:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 16 [2024-02-20 11:46:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70893874] [2024-02-20 11:46:53,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:46:53,887 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-20 11:46:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:46:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-20 11:46:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-02-20 11:46:53,888 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:46:53,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 721 places, 5116 transitions, 513569 flow. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-02-20 11:46:53,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:46:53,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:46:53,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:48:08,468 INFO L124 PetriNetUnfolderBase]: 9133/17118 cut-off events. [2024-02-20 11:48:08,468 INFO L125 PetriNetUnfolderBase]: For 1989/1989 co-relation queries the response was YES. [2024-02-20 11:48:08,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866921 conditions, 17118 events. 9133/17118 cut-off events. For 1989/1989 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 139918 event pairs, 180 based on Foata normal form. 0/14559 useless extension candidates. Maximal degree in co-relation 653993. Up to 16797 conditions per place. [2024-02-20 11:48:08,905 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 3665 selfloop transitions, 263 changer transitions 1476/5405 dead transitions. [2024-02-20 11:48:08,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 5405 transitions, 553442 flow [2024-02-20 11:48:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-20 11:48:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-20 11:48:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 303 transitions. [2024-02-20 11:48:08,906 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2024-02-20 11:48:08,907 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 722 predicate places. [2024-02-20 11:48:08,907 INFO L507 AbstractCegarLoop]: Abstraction has has 747 places, 5405 transitions, 553442 flow [2024-02-20 11:48:08,907 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 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) [2024-02-20 11:48:08,907 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:48:08,907 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:48:08,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-02-20 11:48:09,107 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-02-20 11:48:09,108 INFO L432 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:48:09,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:48:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1864624010, now seen corresponding path program 11 times [2024-02-20 11:48:09,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:48:09,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569981030] [2024-02-20 11:48:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:48:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:48:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:48:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:48:09,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:48:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569981030] [2024-02-20 11:48:09,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569981030] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:48:09,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052439757] [2024-02-20 11:48:09,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-20 11:48:09,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:48:09,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:48:09,506 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:48:09,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-02-20 11:48:09,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-20 11:48:09,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:48:09,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2024-02-20 11:48:09,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:48:09,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:48:09,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:48:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:48:09,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:48:09,860 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-02-20 11:48:09,861 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 42 treesize of output 60 [2024-02-20 11:48:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:48:09,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052439757] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:48:09,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:48:09,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-02-20 11:48:09,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463653266] [2024-02-20 11:48:09,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:48:09,899 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:48:09,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:48:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:48:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:48:09,900 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:48:09,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 747 places, 5405 transitions, 553442 flow. Second operand has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 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) [2024-02-20 11:48:09,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:48:09,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:48:09,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:49:32,996 INFO L124 PetriNetUnfolderBase]: 9217/17310 cut-off events. [2024-02-20 11:49:32,996 INFO L125 PetriNetUnfolderBase]: For 2018/2018 co-relation queries the response was YES. [2024-02-20 11:49:33,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893689 conditions, 17310 events. 9217/17310 cut-off events. For 2018/2018 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 142201 event pairs, 168 based on Foata normal form. 0/14743 useless extension candidates. Maximal degree in co-relation 676175. Up to 16985 conditions per place. [2024-02-20 11:49:33,527 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 3696 selfloop transitions, 274 changer transitions 1476/5447 dead transitions. [2024-02-20 11:49:33,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 5447 transitions, 568642 flow [2024-02-20 11:49:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-20 11:49:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-20 11:49:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 215 transitions. [2024-02-20 11:49:33,528 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4191033138401559 [2024-02-20 11:49:33,529 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 740 predicate places. [2024-02-20 11:49:33,529 INFO L507 AbstractCegarLoop]: Abstraction has has 765 places, 5447 transitions, 568642 flow [2024-02-20 11:49:33,529 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.75) internal successors, (115), 20 states have internal predecessors, (115), 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) [2024-02-20 11:49:33,529 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:49:33,529 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:49:33,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-02-20 11:49:33,729 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-02-20 11:49:33,730 INFO L432 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:49:33,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:49:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash -436681940, now seen corresponding path program 12 times [2024-02-20 11:49:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:49:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907065314] [2024-02-20 11:49:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:49:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:49:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:49:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:49:33,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:49:33,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907065314] [2024-02-20 11:49:33,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907065314] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:49:33,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151124359] [2024-02-20 11:49:33,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-20 11:49:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:49:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:49:33,939 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:49:33,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-02-20 11:49:34,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-20 11:49:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:49:34,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2024-02-20 11:49:34,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:49:34,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-02-20 11:49:34,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:49:34,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:49:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-20 11:49:34,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:49:34,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:49:34,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 164 [2024-02-20 11:49:34,388 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-02-20 11:49:34,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-02-20 11:49:34,442 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-02-20 11:49:34,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 195 treesize of output 190 [2024-02-20 11:49:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:49:34,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151124359] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:49:34,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:49:34,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 23 [2024-02-20 11:49:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725979726] [2024-02-20 11:49:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:49:34,629 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-20 11:49:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:49:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-20 11:49:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-02-20 11:49:34,630 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:49:34,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 5447 transitions, 568642 flow. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 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) [2024-02-20 11:49:34,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:49:34,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:49:34,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-20 11:51:07,800 INFO L124 PetriNetUnfolderBase]: 10624/19945 cut-off events. [2024-02-20 11:51:07,800 INFO L125 PetriNetUnfolderBase]: For 2356/2356 co-relation queries the response was YES. [2024-02-20 11:51:07,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1049340 conditions, 19945 events. 10624/19945 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 168618 event pairs, 240 based on Foata normal form. 0/16866 useless extension candidates. Maximal degree in co-relation 823556. Up to 19594 conditions per place. [2024-02-20 11:51:08,281 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 4235 selfloop transitions, 321 changer transitions 1691/6248 dead transitions. [2024-02-20 11:51:08,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 6248 transitions, 664812 flow [2024-02-20 11:51:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-20 11:51:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-20 11:51:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 343 transitions. [2024-02-20 11:51:08,283 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.39699074074074076 [2024-02-20 11:51:08,283 INFO L308 CegarLoopForPetriNet]: 25 programPoint places, 771 predicate places. [2024-02-20 11:51:08,283 INFO L507 AbstractCegarLoop]: Abstraction has has 796 places, 6248 transitions, 664812 flow [2024-02-20 11:51:08,283 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 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) [2024-02-20 11:51:08,283 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-20 11:51:08,283 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-20 11:51:08,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-02-20 11:51:08,494 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:08,495 INFO L432 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-20 11:51:08,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-20 11:51:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1026518185, now seen corresponding path program 14 times [2024-02-20 11:51:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-20 11:51:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862476106] [2024-02-20 11:51:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-20 11:51:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-20 11:51:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-20 11:51:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-20 11:51:08,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-20 11:51:08,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862476106] [2024-02-20 11:51:08,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862476106] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-20 11:51:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949912764] [2024-02-20 11:51:08,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-20 11:51:08,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-20 11:51:08,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-20 11:51:08,860 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-20 11:51:08,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-02-20 11:51:09,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-20 11:51:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-20 11:51:09,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 33 conjunts are in the unsatisfiable core [2024-02-20 11:51:09,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-20 11:51:09,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-20 11:51:09,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-02-20 11:51:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-20 11:51:09,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-20 11:51:09,212 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-02-20 11:51:09,212 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 40 treesize of output 56 [2024-02-20 11:51:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-20 11:51:09,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949912764] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-20 11:51:09,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-20 11:51:09,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 6] total 19 [2024-02-20 11:51:09,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857833666] [2024-02-20 11:51:09,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-20 11:51:09,246 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-20 11:51:09,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-20 11:51:09,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-20 11:51:09,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-02-20 11:51:09,246 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-02-20 11:51:09,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 6248 transitions, 664812 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-20 11:51:09,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-20 11:51:09,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-02-20 11:51:09,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15