./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:53:54,109 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:53:54,176 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:53:54,183 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:53:54,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:53:54,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:53:54,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:53:54,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:53:54,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:53:54,223 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:53:54,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:53:54,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:53:54,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:53:54,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:53:54,226 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:53:54,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:53:54,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:53:54,227 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:53:54,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:53:54,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:53:54,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:53:54,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:53:54,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:53:54,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:53:54,228 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:53:54,228 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:53:54,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:53:54,229 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:53:54,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:53:54,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:53:54,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:53:54,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:53:54,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:53:54,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:53:54,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:53:54,231 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:53:54,231 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:53:54,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:53:54,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:53:54,232 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:53:54,232 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:53:54,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:53:54,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:53:54,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-06-27 16:53:54,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:53:54,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:53:54,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:53:54,461 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:53:54,461 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:53:54,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2024-06-27 16:53:55,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:53:55,642 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:53:55,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2024-06-27 16:53:55,649 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a2ca1c7/31217e0d4de44d1481fd917da843096e/FLAG260618bed [2024-06-27 16:53:55,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a2ca1c7/31217e0d4de44d1481fd917da843096e [2024-06-27 16:53:55,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:53:55,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:53:55,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:53:55,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:53:55,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:53:55,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@648416a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55, skipping insertion in model container [2024-06-27 16:53:55,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:53:55,816 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2024-06-27 16:53:55,824 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:53:55,831 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:53:55,846 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c[2564,2577] [2024-06-27 16:53:55,849 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:53:55,862 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:53:55,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55 WrapperNode [2024-06-27 16:53:55,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:53:55,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:53:55,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:53:55,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:53:55,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,915 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 182 [2024-06-27 16:53:55,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:53:55,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:53:55,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:53:55,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:53:55,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,953 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,975 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:53:55,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:55,999 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:53:56,000 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:53:56,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:53:56,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:53:56,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (1/1) ... [2024-06-27 16:53:56,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:53:56,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:56,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:53:56,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:53:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:53:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:53:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:53:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:53:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:53:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:53:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:53:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:53:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:53:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:53:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:53:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:53:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:53:56,158 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:53:56,255 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:53:56,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:53:56,490 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:53:56,490 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:53:56,785 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:53:56,786 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 16:53:56,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:53:56 BoogieIcfgContainer [2024-06-27 16:53:56,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:53:56,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:53:56,789 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:53:56,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:53:56,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:53:55" (1/3) ... [2024-06-27 16:53:56,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ffba94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:53:56, skipping insertion in model container [2024-06-27 16:53:56,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:53:55" (2/3) ... [2024-06-27 16:53:56,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ffba94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:53:56, skipping insertion in model container [2024-06-27 16:53:56,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:53:56" (3/3) ... [2024-06-27 16:53:56,793 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-06-27 16:53:56,799 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:53:56,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:53:56,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:53:56,806 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:53:56,852 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:53:56,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:53:56,909 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-06-27 16:53:56,910 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:53:56,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-06-27 16:53:56,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2024-06-27 16:53:56,917 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2024-06-27 16:53:56,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:53:56,935 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57e2e933, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:53:56,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:53:56,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:53:56,947 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-06-27 16:53:56,947 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:53:56,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:56,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:56,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:56,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1525046065, now seen corresponding path program 1 times [2024-06-27 16:53:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515732435] [2024-06-27 16:53:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:56,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:57,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:57,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515732435] [2024-06-27 16:53:57,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515732435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:53:57,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:53:57,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:53:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605755326] [2024-06-27 16:53:57,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:57,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:53:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:57,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:53:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:53:57,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:53:57,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:57,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:57,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:53:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:57,474 INFO L124 PetriNetUnfolderBase]: 617/944 cut-off events. [2024-06-27 16:53:57,474 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-06-27 16:53:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1939 conditions, 944 events. 617/944 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3731 event pairs, 126 based on Foata normal form. 1/931 useless extension candidates. Maximal degree in co-relation 1705. Up to 677 conditions per place. [2024-06-27 16:53:57,480 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2024-06-27 16:53:57,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2024-06-27 16:53:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:53:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:53:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-06-27 16:53:57,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-06-27 16:53:57,490 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2024-06-27 16:53:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2024-06-27 16:53:57,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:53:57,495 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2024-06-27 16:53:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2024-06-27 16:53:57,499 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2024-06-27 16:53:57,499 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2024-06-27 16:53:57,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:57,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:57,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:57,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:53:57,500 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:57,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash -645535589, now seen corresponding path program 1 times [2024-06-27 16:53:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:57,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205722857] [2024-06-27 16:53:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:57,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:57,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205722857] [2024-06-27 16:53:57,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205722857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:53:57,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:53:57,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:53:57,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877144259] [2024-06-27 16:53:57,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:57,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:53:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:57,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:53:57,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:53:57,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:53:57,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:57,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:57,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:53:57,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:57,810 INFO L124 PetriNetUnfolderBase]: 1206/1844 cut-off events. [2024-06-27 16:53:57,811 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-27 16:53:57,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4166 conditions, 1844 events. 1206/1844 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8676 event pairs, 745 based on Foata normal form. 0/1728 useless extension candidates. Maximal degree in co-relation 1064. Up to 1120 conditions per place. [2024-06-27 16:53:57,820 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 63 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2024-06-27 16:53:57,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 71 transitions, 334 flow [2024-06-27 16:53:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:53:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:53:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 16:53:57,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-06-27 16:53:57,824 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 5 states and 92 transitions. [2024-06-27 16:53:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 71 transitions, 334 flow [2024-06-27 16:53:57,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 71 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:53:57,828 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 122 flow [2024-06-27 16:53:57,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-06-27 16:53:57,829 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-06-27 16:53:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 122 flow [2024-06-27 16:53:57,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:57,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:57,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:57,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:53:57,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:57,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2058810230, now seen corresponding path program 1 times [2024-06-27 16:53:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:57,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407515718] [2024-06-27 16:53:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:57,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:57,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407515718] [2024-06-27 16:53:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407515718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:53:57,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:53:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:53:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4751977] [2024-06-27 16:53:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:57,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:53:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:53:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:53:58,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:53:58,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:58,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:58,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:53:58,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:58,189 INFO L124 PetriNetUnfolderBase]: 1047/1614 cut-off events. [2024-06-27 16:53:58,189 INFO L125 PetriNetUnfolderBase]: For 681/759 co-relation queries the response was YES. [2024-06-27 16:53:58,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3863 conditions, 1614 events. 1047/1614 cut-off events. For 681/759 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7290 event pairs, 686 based on Foata normal form. 0/1535 useless extension candidates. Maximal degree in co-relation 2745. Up to 1133 conditions per place. [2024-06-27 16:53:58,196 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 56 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-06-27 16:53:58,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 326 flow [2024-06-27 16:53:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:53:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:53:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 16:53:58,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-27 16:53:58,198 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 122 flow. Second operand 5 states and 87 transitions. [2024-06-27 16:53:58,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 326 flow [2024-06-27 16:53:58,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 322 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:53:58,200 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 143 flow [2024-06-27 16:53:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-06-27 16:53:58,201 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-06-27 16:53:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 143 flow [2024-06-27 16:53:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:58,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:58,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:53:58,202 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:58,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1482252659, now seen corresponding path program 1 times [2024-06-27 16:53:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612628032] [2024-06-27 16:53:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612628032] [2024-06-27 16:53:58,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612628032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:53:58,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:53:58,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:53:58,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569578138] [2024-06-27 16:53:58,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:58,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:53:58,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:58,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:53:58,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:53:58,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:53:58,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:58,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:58,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:53:58,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:58,423 INFO L124 PetriNetUnfolderBase]: 882/1337 cut-off events. [2024-06-27 16:53:58,423 INFO L125 PetriNetUnfolderBase]: For 773/910 co-relation queries the response was YES. [2024-06-27 16:53:58,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1337 events. 882/1337 cut-off events. For 773/910 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5563 event pairs, 601 based on Foata normal form. 0/1270 useless extension candidates. Maximal degree in co-relation 2827. Up to 1095 conditions per place. [2024-06-27 16:53:58,430 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 28 selfloop transitions, 2 changer transitions 23/56 dead transitions. [2024-06-27 16:53:58,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 309 flow [2024-06-27 16:53:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:53:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:53:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-27 16:53:58,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 16:53:58,431 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 143 flow. Second operand 5 states and 81 transitions. [2024-06-27 16:53:58,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 309 flow [2024-06-27 16:53:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:53:58,433 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 116 flow [2024-06-27 16:53:58,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2024-06-27 16:53:58,434 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2024-06-27 16:53:58,434 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 116 flow [2024-06-27 16:53:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:53:58,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:58,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -447072999, now seen corresponding path program 1 times [2024-06-27 16:53:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640522601] [2024-06-27 16:53:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640522601] [2024-06-27 16:53:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640522601] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297328847] [2024-06-27 16:53:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:58,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:58,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:53:58,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:53:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:58,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:53:58,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:53:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:58,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:53:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:53:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297328847] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:53:58,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:53:58,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-06-27 16:53:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885520779] [2024-06-27 16:53:58,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:53:58,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:53:58,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:58,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:53:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:53:58,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:53:58,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 116 flow. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 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) [2024-06-27 16:53:58,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:58,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:53:58,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:53:59,220 INFO L124 PetriNetUnfolderBase]: 1504/2184 cut-off events. [2024-06-27 16:53:59,220 INFO L125 PetriNetUnfolderBase]: For 863/1019 co-relation queries the response was YES. [2024-06-27 16:53:59,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5863 conditions, 2184 events. 1504/2184 cut-off events. For 863/1019 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9655 event pairs, 293 based on Foata normal form. 0/1934 useless extension candidates. Maximal degree in co-relation 5844. Up to 666 conditions per place. [2024-06-27 16:53:59,232 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 96 selfloop transitions, 17 changer transitions 0/115 dead transitions. [2024-06-27 16:53:59,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 115 transitions, 617 flow [2024-06-27 16:53:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:53:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:53:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-06-27 16:53:59,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-27 16:53:59,234 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 116 flow. Second operand 11 states and 156 transitions. [2024-06-27 16:53:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 115 transitions, 617 flow [2024-06-27 16:53:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 115 transitions, 543 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 16:53:59,241 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 183 flow [2024-06-27 16:53:59,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=183, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-27 16:53:59,241 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2024-06-27 16:53:59,241 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 183 flow [2024-06-27 16:53:59,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 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) [2024-06-27 16:53:59,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:53:59,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:53:59,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:53:59,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:59,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:53:59,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:53:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1953383277, now seen corresponding path program 2 times [2024-06-27 16:53:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:53:59,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488075919] [2024-06-27 16:53:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:53:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:53:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:53:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:53:59,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:53:59,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488075919] [2024-06-27 16:53:59,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488075919] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:59,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894367585] [2024-06-27 16:53:59,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:53:59,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:53:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:53:59,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:53:59,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:53:59,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:53:59,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:53:59,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:53:59,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:53:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:53:59,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:53:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:53:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894367585] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:53:59,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:53:59,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-06-27 16:53:59,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743827857] [2024-06-27 16:53:59,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:53:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:53:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:53:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:53:59,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:53:59,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:53:59,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 183 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:53:59,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:53:59,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:53:59,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:00,036 INFO L124 PetriNetUnfolderBase]: 1884/2736 cut-off events. [2024-06-27 16:54:00,037 INFO L125 PetriNetUnfolderBase]: For 1489/1489 co-relation queries the response was YES. [2024-06-27 16:54:00,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7477 conditions, 2736 events. 1884/2736 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12324 event pairs, 283 based on Foata normal form. 14/2749 useless extension candidates. Maximal degree in co-relation 7453. Up to 745 conditions per place. [2024-06-27 16:54:00,049 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 87 selfloop transitions, 29 changer transitions 0/118 dead transitions. [2024-06-27 16:54:00,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 118 transitions, 675 flow [2024-06-27 16:54:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:54:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:54:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-27 16:54:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2024-06-27 16:54:00,051 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 183 flow. Second operand 9 states and 130 transitions. [2024-06-27 16:54:00,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 118 transitions, 675 flow [2024-06-27 16:54:00,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 118 transitions, 672 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:54:00,057 INFO L231 Difference]: Finished difference. Result has 59 places, 63 transitions, 393 flow [2024-06-27 16:54:00,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=59, PETRI_TRANSITIONS=63} [2024-06-27 16:54:00,058 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 24 predicate places. [2024-06-27 16:54:00,058 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 63 transitions, 393 flow [2024-06-27 16:54:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:00,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:00,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:00,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 16:54:00,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:00,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2081588191, now seen corresponding path program 3 times [2024-06-27 16:54:00,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:00,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639900339] [2024-06-27 16:54:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:00,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639900339] [2024-06-27 16:54:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639900339] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:00,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881495819] [2024-06-27 16:54:00,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:54:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:00,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:00,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:54:00,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:54:00,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:00,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:54:00,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:00,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881495819] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:00,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:00,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-06-27 16:54:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82847604] [2024-06-27 16:54:00,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:00,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:54:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:54:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:54:00,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:00,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 63 transitions, 393 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 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) [2024-06-27 16:54:00,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:00,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:00,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:01,238 INFO L124 PetriNetUnfolderBase]: 2771/3992 cut-off events. [2024-06-27 16:54:01,238 INFO L125 PetriNetUnfolderBase]: For 7019/7019 co-relation queries the response was YES. [2024-06-27 16:54:01,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13901 conditions, 3992 events. 2771/3992 cut-off events. For 7019/7019 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19032 event pairs, 479 based on Foata normal form. 16/4007 useless extension candidates. Maximal degree in co-relation 13870. Up to 1231 conditions per place. [2024-06-27 16:54:01,263 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 134 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-27 16:54:01,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 198 transitions, 1403 flow [2024-06-27 16:54:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 16:54:01,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 16:54:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 212 transitions. [2024-06-27 16:54:01,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-27 16:54:01,265 INFO L175 Difference]: Start difference. First operand has 59 places, 63 transitions, 393 flow. Second operand 14 states and 212 transitions. [2024-06-27 16:54:01,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 198 transitions, 1403 flow [2024-06-27 16:54:01,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 198 transitions, 1376 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 16:54:01,318 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 886 flow [2024-06-27 16:54:01,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2024-06-27 16:54:01,318 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 42 predicate places. [2024-06-27 16:54:01,319 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 886 flow [2024-06-27 16:54:01,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 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) [2024-06-27 16:54:01,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:01,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:01,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:01,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:01,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:01,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash -233791729, now seen corresponding path program 4 times [2024-06-27 16:54:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549123186] [2024-06-27 16:54:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:01,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:01,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549123186] [2024-06-27 16:54:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549123186] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:01,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849988021] [2024-06-27 16:54:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:54:01,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:01,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:54:01,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:54:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:01,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:54:01,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:01,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:01,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849988021] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:01,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:01,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-06-27 16:54:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963021196] [2024-06-27 16:54:01,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 16:54:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 16:54:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:54:01,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:54:01,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 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) [2024-06-27 16:54:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:54:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:03,109 INFO L124 PetriNetUnfolderBase]: 4160/5958 cut-off events. [2024-06-27 16:54:03,109 INFO L125 PetriNetUnfolderBase]: For 20217/20217 co-relation queries the response was YES. [2024-06-27 16:54:03,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24154 conditions, 5958 events. 4160/5958 cut-off events. For 20217/20217 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 29010 event pairs, 256 based on Foata normal form. 20/5632 useless extension candidates. Maximal degree in co-relation 24114. Up to 1202 conditions per place. [2024-06-27 16:54:03,153 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 219 selfloop transitions, 163 changer transitions 0/383 dead transitions. [2024-06-27 16:54:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 383 transitions, 3543 flow [2024-06-27 16:54:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 16:54:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 16:54:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 347 transitions. [2024-06-27 16:54:03,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40442890442890445 [2024-06-27 16:54:03,155 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 886 flow. Second operand 26 states and 347 transitions. [2024-06-27 16:54:03,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 383 transitions, 3543 flow [2024-06-27 16:54:03,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 383 transitions, 3368 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 16:54:03,307 INFO L231 Difference]: Finished difference. Result has 107 places, 208 transitions, 2311 flow [2024-06-27 16:54:03,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2311, PETRI_PLACES=107, PETRI_TRANSITIONS=208} [2024-06-27 16:54:03,307 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2024-06-27 16:54:03,308 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 208 transitions, 2311 flow [2024-06-27 16:54:03,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 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) [2024-06-27 16:54:03,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:03,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:03,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:03,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:03,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:03,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 866783843, now seen corresponding path program 5 times [2024-06-27 16:54:03,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:03,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689814320] [2024-06-27 16:54:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:03,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:03,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689814320] [2024-06-27 16:54:03,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689814320] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:03,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163400920] [2024-06-27 16:54:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:54:03,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:03,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:03,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:54:03,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:54:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:03,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:54:03,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:03,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163400920] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:03,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 16:54:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343574482] [2024-06-27 16:54:03,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 16:54:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 16:54:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-06-27 16:54:03,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-06-27 16:54:03,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 208 transitions, 2311 flow. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:03,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:03,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-06-27 16:54:03,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:04,919 INFO L124 PetriNetUnfolderBase]: 4609/6582 cut-off events. [2024-06-27 16:54:04,919 INFO L125 PetriNetUnfolderBase]: For 27391/27391 co-relation queries the response was YES. [2024-06-27 16:54:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29739 conditions, 6582 events. 4609/6582 cut-off events. For 27391/27391 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32306 event pairs, 394 based on Foata normal form. 18/6600 useless extension candidates. Maximal degree in co-relation 29688. Up to 1340 conditions per place. [2024-06-27 16:54:04,967 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 204 selfloop transitions, 227 changer transitions 0/432 dead transitions. [2024-06-27 16:54:04,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 432 transitions, 4446 flow [2024-06-27 16:54:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 16:54:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 16:54:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 303 transitions. [2024-06-27 16:54:04,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41735537190082644 [2024-06-27 16:54:04,969 INFO L175 Difference]: Start difference. First operand has 107 places, 208 transitions, 2311 flow. Second operand 22 states and 303 transitions. [2024-06-27 16:54:04,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 432 transitions, 4446 flow [2024-06-27 16:54:05,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 432 transitions, 4327 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 16:54:05,213 INFO L231 Difference]: Finished difference. Result has 130 places, 307 transitions, 3677 flow [2024-06-27 16:54:05,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3677, PETRI_PLACES=130, PETRI_TRANSITIONS=307} [2024-06-27 16:54:05,213 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 95 predicate places. [2024-06-27 16:54:05,214 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 307 transitions, 3677 flow [2024-06-27 16:54:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:05,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:05,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:05,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:05,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:05,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 471698421, now seen corresponding path program 6 times [2024-06-27 16:54:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323258498] [2024-06-27 16:54:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323258498] [2024-06-27 16:54:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323258498] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:05,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162973796] [2024-06-27 16:54:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:54:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:05,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:54:05,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:54:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:05,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 16:54:05,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:05,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:05,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162973796] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:05,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:54:05,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-06-27 16:54:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913285866] [2024-06-27 16:54:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:54:05,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:54:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:54:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:54:05,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:05,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 307 transitions, 3677 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:05,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:05,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:05,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:06,364 INFO L124 PetriNetUnfolderBase]: 3675/5269 cut-off events. [2024-06-27 16:54:06,365 INFO L125 PetriNetUnfolderBase]: For 30905/30905 co-relation queries the response was YES. [2024-06-27 16:54:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26446 conditions, 5269 events. 3675/5269 cut-off events. For 30905/30905 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26115 event pairs, 326 based on Foata normal form. 14/5282 useless extension candidates. Maximal degree in co-relation 26389. Up to 1705 conditions per place. [2024-06-27 16:54:06,402 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 194 selfloop transitions, 150 changer transitions 0/346 dead transitions. [2024-06-27 16:54:06,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 346 transitions, 4510 flow [2024-06-27 16:54:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:54:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:54:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 16:54:06,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 16:54:06,404 INFO L175 Difference]: Start difference. First operand has 130 places, 307 transitions, 3677 flow. Second operand 8 states and 121 transitions. [2024-06-27 16:54:06,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 346 transitions, 4510 flow [2024-06-27 16:54:06,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 346 transitions, 4345 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 16:54:06,589 INFO L231 Difference]: Finished difference. Result has 133 places, 307 transitions, 3866 flow [2024-06-27 16:54:06,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3866, PETRI_PLACES=133, PETRI_TRANSITIONS=307} [2024-06-27 16:54:06,590 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 98 predicate places. [2024-06-27 16:54:06,590 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 307 transitions, 3866 flow [2024-06-27 16:54:06,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:06,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:06,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:06,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:06,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1419396537, now seen corresponding path program 1 times [2024-06-27 16:54:06,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580101590] [2024-06-27 16:54:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:07,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580101590] [2024-06-27 16:54:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580101590] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713883927] [2024-06-27 16:54:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:07,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:07,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:07,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:54:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:07,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:54:07,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:07,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:07,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713883927] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:07,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:54:07,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-06-27 16:54:07,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057275819] [2024-06-27 16:54:07,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:54:07,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:54:07,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:07,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:54:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:54:07,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-27 16:54:07,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 307 transitions, 3866 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:07,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:07,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-27 16:54:07,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:07,754 INFO L124 PetriNetUnfolderBase]: 4201/6161 cut-off events. [2024-06-27 16:54:07,755 INFO L125 PetriNetUnfolderBase]: For 47823/48171 co-relation queries the response was YES. [2024-06-27 16:54:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31334 conditions, 6161 events. 4201/6161 cut-off events. For 47823/48171 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 32442 event pairs, 1105 based on Foata normal form. 452/6512 useless extension candidates. Maximal degree in co-relation 31278. Up to 2895 conditions per place. [2024-06-27 16:54:07,795 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 281 selfloop transitions, 43 changer transitions 0/389 dead transitions. [2024-06-27 16:54:07,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 389 transitions, 5674 flow [2024-06-27 16:54:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:54:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:54:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-06-27 16:54:07,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 16:54:07,796 INFO L175 Difference]: Start difference. First operand has 133 places, 307 transitions, 3866 flow. Second operand 5 states and 72 transitions. [2024-06-27 16:54:07,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 389 transitions, 5674 flow [2024-06-27 16:54:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 389 transitions, 5525 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 16:54:08,066 INFO L231 Difference]: Finished difference. Result has 135 places, 308 transitions, 4005 flow [2024-06-27 16:54:08,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4005, PETRI_PLACES=135, PETRI_TRANSITIONS=308} [2024-06-27 16:54:08,067 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 100 predicate places. [2024-06-27 16:54:08,067 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 308 transitions, 4005 flow [2024-06-27 16:54:08,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:08,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:08,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:08,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:08,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:08,280 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:08,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1502800228, now seen corresponding path program 1 times [2024-06-27 16:54:08,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:08,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312343492] [2024-06-27 16:54:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:08,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312343492] [2024-06-27 16:54:08,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312343492] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:08,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042821005] [2024-06-27 16:54:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:08,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:08,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:08,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:54:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:08,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:54:08,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:08,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:54:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:08,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:08,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:08,990 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 19 treesize of output 16 [2024-06-27 16:54:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042821005] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:09,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:09,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 17 [2024-06-27 16:54:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942130615] [2024-06-27 16:54:09,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 16:54:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 16:54:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:54:09,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:54:09,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 308 transitions, 4005 flow. Second operand has 18 states, 18 states have (on average 9.944444444444445) internal successors, (179), 18 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:09,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:09,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:54:09,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:10,160 INFO L124 PetriNetUnfolderBase]: 4387/6593 cut-off events. [2024-06-27 16:54:10,160 INFO L125 PetriNetUnfolderBase]: For 48163/48419 co-relation queries the response was YES. [2024-06-27 16:54:10,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34944 conditions, 6593 events. 4387/6593 cut-off events. For 48163/48419 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36922 event pairs, 343 based on Foata normal form. 129/6665 useless extension candidates. Maximal degree in co-relation 34886. Up to 4624 conditions per place. [2024-06-27 16:54:10,209 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 426 selfloop transitions, 135 changer transitions 1/629 dead transitions. [2024-06-27 16:54:10,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 629 transitions, 8656 flow [2024-06-27 16:54:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:54:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:54:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 260 transitions. [2024-06-27 16:54:10,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 16:54:10,214 INFO L175 Difference]: Start difference. First operand has 135 places, 308 transitions, 4005 flow. Second operand 16 states and 260 transitions. [2024-06-27 16:54:10,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 629 transitions, 8656 flow [2024-06-27 16:54:10,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 629 transitions, 8588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:54:10,403 INFO L231 Difference]: Finished difference. Result has 151 places, 433 transitions, 6041 flow [2024-06-27 16:54:10,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6041, PETRI_PLACES=151, PETRI_TRANSITIONS=433} [2024-06-27 16:54:10,404 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 116 predicate places. [2024-06-27 16:54:10,404 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 433 transitions, 6041 flow [2024-06-27 16:54:10,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.944444444444445) internal successors, (179), 18 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:10,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:10,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:10,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:54:10,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:10,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 828887727, now seen corresponding path program 1 times [2024-06-27 16:54:10,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442108097] [2024-06-27 16:54:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:11,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442108097] [2024-06-27 16:54:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442108097] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286496001] [2024-06-27 16:54:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:11,105 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:11,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:54:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:11,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 16:54:11,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:11,204 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 [2024-06-27 16:54:11,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:54:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:11,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:11,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286496001] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:11,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-06-27 16:54:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120289284] [2024-06-27 16:54:11,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:54:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:54:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:54:11,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:11,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 433 transitions, 6041 flow. Second operand has 25 states, 25 states have (on average 7.56) internal successors, (189), 25 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:11,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:11,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:11,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:14,532 INFO L124 PetriNetUnfolderBase]: 8449/12341 cut-off events. [2024-06-27 16:54:14,533 INFO L125 PetriNetUnfolderBase]: For 77037/77037 co-relation queries the response was YES. [2024-06-27 16:54:14,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67128 conditions, 12341 events. 8449/12341 cut-off events. For 77037/77037 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 71118 event pairs, 396 based on Foata normal form. 2/12343 useless extension candidates. Maximal degree in co-relation 65044. Up to 7751 conditions per place. [2024-06-27 16:54:14,626 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 982 selfloop transitions, 350 changer transitions 2/1337 dead transitions. [2024-06-27 16:54:14,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1337 transitions, 18950 flow [2024-06-27 16:54:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 16:54:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 16:54:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 534 transitions. [2024-06-27 16:54:14,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258373205741627 [2024-06-27 16:54:14,629 INFO L175 Difference]: Start difference. First operand has 151 places, 433 transitions, 6041 flow. Second operand 38 states and 534 transitions. [2024-06-27 16:54:14,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1337 transitions, 18950 flow [2024-06-27 16:54:15,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1337 transitions, 18727 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-27 16:54:15,378 INFO L231 Difference]: Finished difference. Result has 203 places, 762 transitions, 11158 flow [2024-06-27 16:54:15,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11158, PETRI_PLACES=203, PETRI_TRANSITIONS=762} [2024-06-27 16:54:15,379 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 168 predicate places. [2024-06-27 16:54:15,379 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 762 transitions, 11158 flow [2024-06-27 16:54:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.56) internal successors, (189), 25 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:15,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:15,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 16:54:15,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:54:15,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:15,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2013824915, now seen corresponding path program 2 times [2024-06-27 16:54:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084999623] [2024-06-27 16:54:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:15,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:15,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084999623] [2024-06-27 16:54:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084999623] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:15,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814924544] [2024-06-27 16:54:15,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:54:15,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:15,968 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:15,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:54:16,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:54:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:16,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 16:54:16,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:16,081 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 [2024-06-27 16:54:16,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:16,274 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 17 treesize of output 15 [2024-06-27 16:54:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:16,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814924544] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:16,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 25 [2024-06-27 16:54:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024562724] [2024-06-27 16:54:16,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:16,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:54:16,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:54:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:54:16,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:16,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 762 transitions, 11158 flow. Second operand has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:16,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:16,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:16,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:20,683 INFO L124 PetriNetUnfolderBase]: 11603/17041 cut-off events. [2024-06-27 16:54:20,684 INFO L125 PetriNetUnfolderBase]: For 132998/132998 co-relation queries the response was YES. [2024-06-27 16:54:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100534 conditions, 17041 events. 11603/17041 cut-off events. For 132998/132998 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 104670 event pairs, 717 based on Foata normal form. 2/17043 useless extension candidates. Maximal degree in co-relation 99346. Up to 10764 conditions per place. [2024-06-27 16:54:20,852 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 1139 selfloop transitions, 524 changer transitions 2/1668 dead transitions. [2024-06-27 16:54:20,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1668 transitions, 26015 flow [2024-06-27 16:54:20,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-06-27 16:54:20,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-06-27 16:54:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 563 transitions. [2024-06-27 16:54:20,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062049062049062 [2024-06-27 16:54:20,854 INFO L175 Difference]: Start difference. First operand has 203 places, 762 transitions, 11158 flow. Second operand 42 states and 563 transitions. [2024-06-27 16:54:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1668 transitions, 26015 flow [2024-06-27 16:54:22,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1668 transitions, 25980 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 16:54:22,987 INFO L231 Difference]: Finished difference. Result has 266 places, 1068 transitions, 17315 flow [2024-06-27 16:54:22,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11123, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=17315, PETRI_PLACES=266, PETRI_TRANSITIONS=1068} [2024-06-27 16:54:22,988 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 231 predicate places. [2024-06-27 16:54:22,988 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 1068 transitions, 17315 flow [2024-06-27 16:54:22,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:22,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:22,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:23,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 16:54:23,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:54:23,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1154506346, now seen corresponding path program 2 times [2024-06-27 16:54:23,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:23,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708217891] [2024-06-27 16:54:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708217891] [2024-06-27 16:54:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708217891] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:23,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565005051] [2024-06-27 16:54:23,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:54:23,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:23,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:54:23,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:54:23,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:54:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:23,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:54:23,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:23,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:54:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:23,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:23,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:23,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-06-27 16:54:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:23,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565005051] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:23,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:23,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 12 [2024-06-27 16:54:23,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013607258] [2024-06-27 16:54:23,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:54:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:54:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:54:23,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:54:23,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 1068 transitions, 17315 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:23,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:23,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:54:23,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:27,429 INFO L124 PetriNetUnfolderBase]: 10885/16544 cut-off events. [2024-06-27 16:54:27,429 INFO L125 PetriNetUnfolderBase]: For 196944/197622 co-relation queries the response was YES. [2024-06-27 16:54:27,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112063 conditions, 16544 events. 10885/16544 cut-off events. For 196944/197622 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 109314 event pairs, 775 based on Foata normal form. 242/16640 useless extension candidates. Maximal degree in co-relation 111489. Up to 12806 conditions per place. [2024-06-27 16:54:27,654 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 851 selfloop transitions, 195 changer transitions 1/1299 dead transitions. [2024-06-27 16:54:27,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1299 transitions, 22875 flow [2024-06-27 16:54:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:54:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:54:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-27 16:54:27,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 16:54:27,656 INFO L175 Difference]: Start difference. First operand has 266 places, 1068 transitions, 17315 flow. Second operand 12 states and 192 transitions. [2024-06-27 16:54:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1299 transitions, 22875 flow [2024-06-27 16:54:30,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1299 transitions, 22104 flow, removed 183 selfloop flow, removed 11 redundant places. [2024-06-27 16:54:30,836 INFO L231 Difference]: Finished difference. Result has 270 places, 1139 transitions, 18267 flow [2024-06-27 16:54:30,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16640, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18267, PETRI_PLACES=270, PETRI_TRANSITIONS=1139} [2024-06-27 16:54:30,838 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 235 predicate places. [2024-06-27 16:54:30,838 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1139 transitions, 18267 flow [2024-06-27 16:54:30,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:30,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:30,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:30,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 16:54:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:54:31,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:31,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:31,050 INFO L85 PathProgramCache]: Analyzing trace with hash 395726395, now seen corresponding path program 3 times [2024-06-27 16:54:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:31,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852741148] [2024-06-27 16:54:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:31,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:31,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852741148] [2024-06-27 16:54:31,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852741148] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:31,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604381431] [2024-06-27 16:54:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:54:31,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:31,805 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) [2024-06-27 16:54:31,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:54:31,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:54:31,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:31,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 16:54:31,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:31,899 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 [2024-06-27 16:54:32,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:32,055 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 17 treesize of output 15 [2024-06-27 16:54:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:32,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:32,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-06-27 16:54:32,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:32,281 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 76 treesize of output 66 [2024-06-27 16:54:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:32,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604381431] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:32,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:32,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-06-27 16:54:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105038891] [2024-06-27 16:54:32,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:32,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:54:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:54:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:54:32,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:32,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1139 transitions, 18267 flow. Second operand has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:32,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:32,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:32,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:40,114 INFO L124 PetriNetUnfolderBase]: 21328/30752 cut-off events. [2024-06-27 16:54:40,114 INFO L125 PetriNetUnfolderBase]: For 366321/366923 co-relation queries the response was YES. [2024-06-27 16:54:40,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208038 conditions, 30752 events. 21328/30752 cut-off events. For 366321/366923 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 197097 event pairs, 1180 based on Foata normal form. 231/30857 useless extension candidates. Maximal degree in co-relation 207345. Up to 15555 conditions per place. [2024-06-27 16:54:40,794 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 1171 selfloop transitions, 748 changer transitions 6/2102 dead transitions. [2024-06-27 16:54:40,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 2102 transitions, 35401 flow [2024-06-27 16:54:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 16:54:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 16:54:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 368 transitions. [2024-06-27 16:54:40,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44606060606060605 [2024-06-27 16:54:40,806 INFO L175 Difference]: Start difference. First operand has 270 places, 1139 transitions, 18267 flow. Second operand 25 states and 368 transitions. [2024-06-27 16:54:40,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 2102 transitions, 35401 flow [2024-06-27 16:54:48,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 2102 transitions, 35132 flow, removed 99 selfloop flow, removed 3 redundant places. [2024-06-27 16:54:48,680 INFO L231 Difference]: Finished difference. Result has 299 places, 1600 transitions, 26854 flow [2024-06-27 16:54:48,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=18088, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=26854, PETRI_PLACES=299, PETRI_TRANSITIONS=1600} [2024-06-27 16:54:48,682 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 264 predicate places. [2024-06-27 16:54:48,682 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 1600 transitions, 26854 flow [2024-06-27 16:54:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:54:48,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:54:48,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:54:48,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:54:48,902 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:54:48,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:54:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash 643081185, now seen corresponding path program 4 times [2024-06-27 16:54:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:54:48,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163595162] [2024-06-27 16:54:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:54:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:54:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:54:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:54:49,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:54:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163595162] [2024-06-27 16:54:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163595162] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:54:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380535226] [2024-06-27 16:54:49,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:54:49,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:54:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:54:49,243 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) [2024-06-27 16:54:49,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:54:49,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:54:49,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:54:49,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjunts are in the unsatisfiable core [2024-06-27 16:54:49,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:54:49,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:54:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:49,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:54:49,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:54:49,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2024-06-27 16:54:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:54:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380535226] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:54:49,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:54:49,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-06-27 16:54:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503921188] [2024-06-27 16:54:49,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:54:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:54:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:54:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:54:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:54:49,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:54:49,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 1600 transitions, 26854 flow. Second operand has 26 states, 26 states have (on average 7.346153846153846) internal successors, (191), 26 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:54:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:54:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:54:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:54:59,782 INFO L124 PetriNetUnfolderBase]: 21247/31300 cut-off events. [2024-06-27 16:54:59,782 INFO L125 PetriNetUnfolderBase]: For 444579/444579 co-relation queries the response was YES. [2024-06-27 16:55:00,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233199 conditions, 31300 events. 21247/31300 cut-off events. For 444579/444579 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 211122 event pairs, 1351 based on Foata normal form. 2/31302 useless extension candidates. Maximal degree in co-relation 232519. Up to 24461 conditions per place. [2024-06-27 16:55:00,730 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 1611 selfloop transitions, 796 changer transitions 2/2412 dead transitions. [2024-06-27 16:55:00,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 2412 transitions, 43979 flow [2024-06-27 16:55:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-06-27 16:55:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-06-27 16:55:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 596 transitions. [2024-06-27 16:55:00,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842682140554481 [2024-06-27 16:55:00,732 INFO L175 Difference]: Start difference. First operand has 299 places, 1600 transitions, 26854 flow. Second operand 47 states and 596 transitions. [2024-06-27 16:55:00,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 2412 transitions, 43979 flow [2024-06-27 16:55:09,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 2412 transitions, 43760 flow, removed 107 selfloop flow, removed 2 redundant places. [2024-06-27 16:55:09,858 INFO L231 Difference]: Finished difference. Result has 363 places, 1997 transitions, 35712 flow [2024-06-27 16:55:09,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=26683, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=35712, PETRI_PLACES=363, PETRI_TRANSITIONS=1997} [2024-06-27 16:55:09,860 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 328 predicate places. [2024-06-27 16:55:09,860 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1997 transitions, 35712 flow [2024-06-27 16:55:09,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.346153846153846) internal successors, (191), 26 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:09,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:09,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:09,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 16:55:10,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:55:10,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 763011246, now seen corresponding path program 3 times [2024-06-27 16:55:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:55:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021240302] [2024-06-27 16:55:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:55:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:10,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021240302] [2024-06-27 16:55:10,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021240302] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:10,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076698964] [2024-06-27 16:55:10,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:55:10,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:10,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:10,338 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) [2024-06-27 16:55:10,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 16:55:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:55:10,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:10,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 16:55:10,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:10,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 16:55:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:55:10,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:10,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:55:10,570 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 19 treesize of output 16 [2024-06-27 16:55:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:55:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076698964] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:10,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:55:10,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2024-06-27 16:55:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410995779] [2024-06-27 16:55:10,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 16:55:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:55:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 16:55:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-06-27 16:55:10,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-27 16:55:10,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1997 transitions, 35712 flow. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:10,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:10,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-27 16:55:10,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:55:21,112 INFO L124 PetriNetUnfolderBase]: 20632/30942 cut-off events. [2024-06-27 16:55:21,113 INFO L125 PetriNetUnfolderBase]: For 571524/572866 co-relation queries the response was YES. [2024-06-27 16:55:21,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254909 conditions, 30942 events. 20632/30942 cut-off events. For 571524/572866 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 217525 event pairs, 1202 based on Foata normal form. 437/31105 useless extension candidates. Maximal degree in co-relation 254273. Up to 23895 conditions per place. [2024-06-27 16:55:21,774 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 1431 selfloop transitions, 463 changer transitions 1/2302 dead transitions. [2024-06-27 16:55:21,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2302 transitions, 44315 flow [2024-06-27 16:55:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:55:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:55:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 251 transitions. [2024-06-27 16:55:21,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2024-06-27 16:55:21,775 INFO L175 Difference]: Start difference. First operand has 363 places, 1997 transitions, 35712 flow. Second operand 16 states and 251 transitions. [2024-06-27 16:55:21,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2302 transitions, 44315 flow [2024-06-27 16:55:32,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2302 transitions, 43489 flow, removed 280 selfloop flow, removed 6 redundant places. [2024-06-27 16:55:32,821 INFO L231 Difference]: Finished difference. Result has 377 places, 2145 transitions, 39050 flow [2024-06-27 16:55:32,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=34888, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=39050, PETRI_PLACES=377, PETRI_TRANSITIONS=2145} [2024-06-27 16:55:32,832 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 342 predicate places. [2024-06-27 16:55:32,833 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2145 transitions, 39050 flow [2024-06-27 16:55:32,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:32,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:55:32,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:55:32,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 16:55:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:33,035 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:55:33,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:55:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1625497445, now seen corresponding path program 5 times [2024-06-27 16:55:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:55:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341630109] [2024-06-27 16:55:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:55:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:55:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:55:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:55:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341630109] [2024-06-27 16:55:33,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341630109] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:55:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098032701] [2024-06-27 16:55:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:55:33,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:55:33,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:55:33,397 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) [2024-06-27 16:55:33,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 16:55:33,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 16:55:33,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:55:33,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 16:55:33,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:55:33,504 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 [2024-06-27 16:55:33,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:55:33,733 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 17 treesize of output 15 [2024-06-27 16:55:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:55:33,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:55:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:55:34,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098032701] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:55:34,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:55:34,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 26 [2024-06-27 16:55:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463072477] [2024-06-27 16:55:34,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:55:34,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 16:55:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:55:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 16:55:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2024-06-27 16:55:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-27 16:55:34,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2145 transitions, 39050 flow. Second operand has 27 states, 27 states have (on average 7.407407407407407) internal successors, (200), 27 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:55:34,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:55:34,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-27 16:55:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand