./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-4.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/unroll-cond-4.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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:10:36,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:10:36,105 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:10:36,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:10:36,109 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:10:36,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:10:36,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:10:36,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:10:36,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:10:36,130 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:10:36,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:10:36,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:10:36,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:10:36,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:10:36,132 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:10:36,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:10:36,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:10:36,133 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:10:36,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:10:36,134 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:10:36,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:10:36,134 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:10:36,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:10:36,135 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:10:36,135 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:10:36,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:10:36,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:10:36,136 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:10:36,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:10:36,137 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:10:36,137 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:10:36,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:10:36,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:10:36,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:10:36,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:10:36,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:10:36,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:10:36,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:10:36,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:10:36,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:10:36,140 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:10:36,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:10:36,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:10:36,141 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-06-27 17:10:36,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:10:36,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:10:36,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:10:36,374 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:10:36,375 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:10:36,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2024-06-27 17:10:37,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:10:37,794 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:10:37,795 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2024-06-27 17:10:37,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69dc934b7/c437c85829844fd5a5aee1201c0f4bdb/FLAGc058df318 [2024-06-27 17:10:37,813 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69dc934b7/c437c85829844fd5a5aee1201c0f4bdb [2024-06-27 17:10:37,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:10:37,817 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:10:37,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:10:37,818 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:10:37,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:10:37,822 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:10:37" (1/1) ... [2024-06-27 17:10:37,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db1d041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:37, skipping insertion in model container [2024-06-27 17:10:37,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:10:37" (1/1) ... [2024-06-27 17:10:37,844 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:10:38,043 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/unroll-cond-4.wvr.c[2834,2847] [2024-06-27 17:10:38,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:10:38,077 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:10:38,112 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/unroll-cond-4.wvr.c[2834,2847] [2024-06-27 17:10:38,118 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:10:38,133 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:10:38,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38 WrapperNode [2024-06-27 17:10:38,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:10:38,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:10:38,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:10:38,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:10:38,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,150 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,172 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 176 [2024-06-27 17:10:38,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:10:38,177 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:10:38,177 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:10:38,177 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:10:38,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,207 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:10:38,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,207 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,216 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,218 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:10:38,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:10:38,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:10:38,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:10:38,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (1/1) ... [2024-06-27 17:10:38,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:10:38,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:38,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:10:38,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:10:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:10:38,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:10:38,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:10:38,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:10:38,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:10:38,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:10:38,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:10:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:10:38,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:10:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:10:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:10:38,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:10:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:10:38,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:10:38,333 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:10:38,450 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:10:38,452 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:10:38,805 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:10:38,805 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:10:39,137 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:10:39,137 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 17:10:39,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:10:39 BoogieIcfgContainer [2024-06-27 17:10:39,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:10:39,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:10:39,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:10:39,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:10:39,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:10:37" (1/3) ... [2024-06-27 17:10:39,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45901b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:10:39, skipping insertion in model container [2024-06-27 17:10:39,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:10:38" (2/3) ... [2024-06-27 17:10:39,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b45901b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:10:39, skipping insertion in model container [2024-06-27 17:10:39,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:10:39" (3/3) ... [2024-06-27 17:10:39,146 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-06-27 17:10:39,153 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:10:39,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:10:39,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:10:39,163 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:10:39,220 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:10:39,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:10:39,293 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-06-27 17:10:39,293 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-06-27 17:10:39,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-06-27 17:10:39,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-06-27 17:10:39,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:10:39,314 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;@7796812, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:10:39,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:10:39,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:10:39,323 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-06-27 17:10:39,324 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:39,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:39,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:39,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1952885711, now seen corresponding path program 1 times [2024-06-27 17:10:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:39,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385281254] [2024-06-27 17:10:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:10:39,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385281254] [2024-06-27 17:10:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385281254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:39,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:39,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:10:39,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103448908] [2024-06-27 17:10:39,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:39,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:10:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:10:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:10:39,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:39,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:39,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:39,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:39,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:40,173 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-06-27 17:10:40,173 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-27 17:10:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-06-27 17:10:40,178 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-06-27 17:10:40,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-06-27 17:10:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:10:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:10:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-06-27 17:10:40,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 17:10:40,190 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-06-27 17:10:40,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-06-27 17:10:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 17:10:40,194 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-06-27 17:10:40,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-06-27 17:10:40,199 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-06-27 17:10:40,200 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-06-27 17:10:40,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:40,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:40,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:10:40,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:40,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:40,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1234725516, now seen corresponding path program 1 times [2024-06-27 17:10:40,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:40,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208739390] [2024-06-27 17:10:40,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:40,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208739390] [2024-06-27 17:10:40,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208739390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:40,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:40,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:40,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343825912] [2024-06-27 17:10:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:40,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:40,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:40,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:40,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:40,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:40,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:40,741 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2024-06-27 17:10:40,741 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:10:40,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 324 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2024-06-27 17:10:40,743 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-06-27 17:10:40,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2024-06-27 17:10:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-06-27 17:10:40,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 17:10:40,745 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2024-06-27 17:10:40,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2024-06-27 17:10:40,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:10:40,747 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2024-06-27 17:10:40,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-06-27 17:10:40,748 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-06-27 17:10:40,748 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2024-06-27 17:10:40,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:40,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:40,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:40,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:10:40,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:40,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1963681990, now seen corresponding path program 2 times [2024-06-27 17:10:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:40,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131030176] [2024-06-27 17:10:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:40,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:40,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131030176] [2024-06-27 17:10:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131030176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:40,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:40,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:40,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5992267] [2024-06-27 17:10:40,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:40,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:40,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:40,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:40,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:40,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:40,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:41,040 INFO L124 PetriNetUnfolderBase]: 100/190 cut-off events. [2024-06-27 17:10:41,040 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-06-27 17:10:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 190 events. 100/190 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 581 event pairs, 39 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 531. Up to 120 conditions per place. [2024-06-27 17:10:41,043 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 34 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-27 17:10:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 242 flow [2024-06-27 17:10:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-06-27 17:10:41,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-27 17:10:41,045 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 48 transitions. [2024-06-27 17:10:41,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 242 flow [2024-06-27 17:10:41,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 225 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 17:10:41,048 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2024-06-27 17:10:41,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-27 17:10:41,049 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-06-27 17:10:41,049 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2024-06-27 17:10:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:41,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:41,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:10:41,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:41,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash -315186528, now seen corresponding path program 3 times [2024-06-27 17:10:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:41,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105729243] [2024-06-27 17:10:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:41,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:41,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105729243] [2024-06-27 17:10:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105729243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517590042] [2024-06-27 17:10:41,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:41,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:41,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:41,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:41,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:41,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:41,430 INFO L124 PetriNetUnfolderBase]: 109/204 cut-off events. [2024-06-27 17:10:41,431 INFO L125 PetriNetUnfolderBase]: For 284/284 co-relation queries the response was YES. [2024-06-27 17:10:41,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 204 events. 109/204 cut-off events. For 284/284 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 654 event pairs, 39 based on Foata normal form. 3/182 useless extension candidates. Maximal degree in co-relation 689. Up to 111 conditions per place. [2024-06-27 17:10:41,434 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-06-27 17:10:41,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 307 flow [2024-06-27 17:10:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-06-27 17:10:41,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 17:10:41,435 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 52 transitions. [2024-06-27 17:10:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 307 flow [2024-06-27 17:10:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 283 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 17:10:41,439 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2024-06-27 17:10:41,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-06-27 17:10:41,440 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-06-27 17:10:41,440 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2024-06-27 17:10:41,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:41,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:41,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:10:41,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:41,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:41,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1798077986, now seen corresponding path program 4 times [2024-06-27 17:10:41,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:41,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518771328] [2024-06-27 17:10:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:41,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518771328] [2024-06-27 17:10:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518771328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:41,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:41,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724366296] [2024-06-27 17:10:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:41,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:41,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:41,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:41,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:41,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:41,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:41,712 INFO L124 PetriNetUnfolderBase]: 106/201 cut-off events. [2024-06-27 17:10:41,713 INFO L125 PetriNetUnfolderBase]: For 471/471 co-relation queries the response was YES. [2024-06-27 17:10:41,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 201 events. 106/201 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 640 event pairs, 46 based on Foata normal form. 3/179 useless extension candidates. Maximal degree in co-relation 752. Up to 160 conditions per place. [2024-06-27 17:10:41,715 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 29 selfloop transitions, 15 changer transitions 0/45 dead transitions. [2024-06-27 17:10:41,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 365 flow [2024-06-27 17:10:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-06-27 17:10:41,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-27 17:10:41,717 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 47 transitions. [2024-06-27 17:10:41,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 365 flow [2024-06-27 17:10:41,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 352 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 17:10:41,721 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2024-06-27 17:10:41,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-06-27 17:10:41,722 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-06-27 17:10:41,722 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2024-06-27 17:10:41,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:41,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:41,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:10:41,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:41,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash -265137648, now seen corresponding path program 5 times [2024-06-27 17:10:41,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:41,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181591283] [2024-06-27 17:10:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181591283] [2024-06-27 17:10:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181591283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:41,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:41,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190185893] [2024-06-27 17:10:41,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:41,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:41,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:41,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:41,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:41,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:42,048 INFO L124 PetriNetUnfolderBase]: 107/204 cut-off events. [2024-06-27 17:10:42,049 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2024-06-27 17:10:42,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 204 events. 107/204 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 668 event pairs, 34 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 852. Up to 113 conditions per place. [2024-06-27 17:10:42,051 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 35 selfloop transitions, 14 changer transitions 0/50 dead transitions. [2024-06-27 17:10:42,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 432 flow [2024-06-27 17:10:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-06-27 17:10:42,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 17:10:42,055 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 51 transitions. [2024-06-27 17:10:42,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 432 flow [2024-06-27 17:10:42,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 378 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-27 17:10:42,061 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2024-06-27 17:10:42,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 17:10:42,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2024-06-27 17:10:42,064 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2024-06-27 17:10:42,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:42,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:42,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:42,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:10:42,065 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:42,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1853489246, now seen corresponding path program 6 times [2024-06-27 17:10:42,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:42,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451328953] [2024-06-27 17:10:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:10:42,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451328953] [2024-06-27 17:10:42,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451328953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:10:42,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:10:42,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:10:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446100539] [2024-06-27 17:10:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:10:42,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:10:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:10:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:10:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:10:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:10:42,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:42,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:10:42,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:10:42,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:10:42,353 INFO L124 PetriNetUnfolderBase]: 106/197 cut-off events. [2024-06-27 17:10:42,353 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2024-06-27 17:10:42,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 197 events. 106/197 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 613 event pairs, 45 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 798. Up to 154 conditions per place. [2024-06-27 17:10:42,357 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2024-06-27 17:10:42,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 404 flow [2024-06-27 17:10:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:10:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:10:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-06-27 17:10:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-27 17:10:42,360 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 47 transitions. [2024-06-27 17:10:42,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 404 flow [2024-06-27 17:10:42,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 370 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:10:42,364 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2024-06-27 17:10:42,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-27 17:10:42,366 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2024-06-27 17:10:42,366 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2024-06-27 17:10:42,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:10:42,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:10:42,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:10:42,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:10:42,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:10:42,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:10:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2116690811, now seen corresponding path program 1 times [2024-06-27 17:10:42,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:10:42,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989187629] [2024-06-27 17:10:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:42,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:10:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:42,601 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 17:10:42,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:10:42,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989187629] [2024-06-27 17:10:42,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989187629] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:10:42,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809808448] [2024-06-27 17:10:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:10:42,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:10:42,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:10:42,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:10:42,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:10:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:10:42,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:10:42,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:10:42,813 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 17:10:43,968 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-06-27 17:10:43,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 169 [2024-06-27 17:10:54,160 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:11:06,199 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:11:34,609 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:11:42,642 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:11:54,749 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:11:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:11:58,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:05,402 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 87 treesize of output 77 [2024-06-27 17:12:05,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:12:05,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 188 [2024-06-27 17:12:06,630 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 33 treesize of output 29 [2024-06-27 17:12:06,640 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:12:06,640 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 62 treesize of output 1 [2024-06-27 17:12:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:06,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809808448] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:06,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:06,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-06-27 17:12:06,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421750194] [2024-06-27 17:12:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:06,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:12:06,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:06,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:12:06,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:12:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:12:06,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:06,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:06,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:12:06,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:24,184 WARN L293 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 102 DAG size of output: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:13:23,114 WARN L293 SmtUtils]: Spent 56.63s on a formula simplification. DAG size of input: 92 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:13:32,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:13:32,962 INFO L124 PetriNetUnfolderBase]: 349/674 cut-off events. [2024-06-27 17:13:32,962 INFO L125 PetriNetUnfolderBase]: For 1677/1677 co-relation queries the response was YES. [2024-06-27 17:13:32,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 674 events. 349/674 cut-off events. For 1677/1677 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3198 event pairs, 30 based on Foata normal form. 5/570 useless extension candidates. Maximal degree in co-relation 2241. Up to 201 conditions per place. [2024-06-27 17:13:32,967 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 91 selfloop transitions, 51 changer transitions 56/199 dead transitions. [2024-06-27 17:13:32,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 199 transitions, 1538 flow [2024-06-27 17:13:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:13:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:13:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 248 transitions. [2024-06-27 17:13:32,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-27 17:13:32,974 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 26 states and 248 transitions. [2024-06-27 17:13:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 199 transitions, 1538 flow [2024-06-27 17:13:32,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 199 transitions, 1438 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 17:13:32,984 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 704 flow [2024-06-27 17:13:32,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=704, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-06-27 17:13:32,985 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-06-27 17:13:32,985 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 704 flow [2024-06-27 17:13:32,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:32,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:32,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:33,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:13:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:33,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:13:33,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1016505761, now seen corresponding path program 2 times [2024-06-27 17:13:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296905316] [2024-06-27 17:13:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:33,384 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 17:13:33,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:33,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296905316] [2024-06-27 17:13:33,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296905316] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:33,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866340264] [2024-06-27 17:13:33,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:13:33,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:33,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:33,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:33,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:13:33,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:33,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:33,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:13:33,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:33,578 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 17:13:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:33,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:51,063 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 170 treesize of output 150 [2024-06-27 17:13:51,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:51,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 547 treesize of output 481 [2024-06-27 17:14:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:08,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866340264] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:08,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:08,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-06-27 17:14:08,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352282377] [2024-06-27 17:14:08,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:08,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:14:08,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:08,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:14:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:14:08,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:14:08,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 704 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:08,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:08,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:14:08,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:37,808 WARN L293 SmtUtils]: Spent 29.27s on a formula simplification. DAG size of input: 123 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:14:53,211 WARN L293 SmtUtils]: Spent 14.16s on a formula simplification. DAG size of input: 124 DAG size of output: 34 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:15:00,373 INFO L124 PetriNetUnfolderBase]: 337/703 cut-off events. [2024-06-27 17:15:00,373 INFO L125 PetriNetUnfolderBase]: For 2726/2726 co-relation queries the response was YES. [2024-06-27 17:15:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3256 conditions, 703 events. 337/703 cut-off events. For 2726/2726 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3667 event pairs, 25 based on Foata normal form. 10/671 useless extension candidates. Maximal degree in co-relation 3110. Up to 297 conditions per place. [2024-06-27 17:15:00,378 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 103 selfloop transitions, 90 changer transitions 16/210 dead transitions. [2024-06-27 17:15:00,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 210 transitions, 1969 flow [2024-06-27 17:15:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 17:15:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 17:15:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 264 transitions. [2024-06-27 17:15:00,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-27 17:15:00,381 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 704 flow. Second operand 31 states and 264 transitions. [2024-06-27 17:15:00,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 210 transitions, 1969 flow [2024-06-27 17:15:00,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 210 transitions, 1801 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 17:15:00,395 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1311 flow [2024-06-27 17:15:00,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1311, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-27 17:15:00,396 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 90 predicate places. [2024-06-27 17:15:00,396 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1311 flow [2024-06-27 17:15:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:00,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:00,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:15:00,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:15:00,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-06-27 17:15:00,600 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:00,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash -651789065, now seen corresponding path program 3 times [2024-06-27 17:15:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:00,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421467111] [2024-06-27 17:15:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:00,758 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 17:15:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421467111] [2024-06-27 17:15:00,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421467111] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:00,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924507903] [2024-06-27 17:15:00,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:15:00,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:00,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:00,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:00,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:15:00,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:15:00,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:15:00,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-27 17:15:00,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:00,929 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 17:15:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:01,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:25,125 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 170 treesize of output 150 [2024-06-27 17:15:25,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:15:25,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 488 [2024-06-27 17:15:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:42,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924507903] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:42,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-06-27 17:15:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706074131] [2024-06-27 17:15:42,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:42,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:15:42,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:15:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:15:42,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:15:42,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1311 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:42,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:42,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:15:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:45,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:15:45,733 INFO L124 PetriNetUnfolderBase]: 343/708 cut-off events. [2024-06-27 17:15:45,733 INFO L125 PetriNetUnfolderBase]: For 3733/3733 co-relation queries the response was YES. [2024-06-27 17:15:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3770 conditions, 708 events. 343/708 cut-off events. For 3733/3733 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3702 event pairs, 33 based on Foata normal form. 18/718 useless extension candidates. Maximal degree in co-relation 3473. Up to 266 conditions per place. [2024-06-27 17:15:45,738 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 84 selfloop transitions, 57 changer transitions 41/183 dead transitions. [2024-06-27 17:15:45,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 2010 flow [2024-06-27 17:15:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 17:15:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 17:15:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 172 transitions. [2024-06-27 17:15:45,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-27 17:15:45,741 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1311 flow. Second operand 21 states and 172 transitions. [2024-06-27 17:15:45,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 2010 flow [2024-06-27 17:15:45,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 183 transitions, 1852 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 17:15:45,760 INFO L231 Difference]: Finished difference. Result has 127 places, 105 transitions, 1073 flow [2024-06-27 17:15:45,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1073, PETRI_PLACES=127, PETRI_TRANSITIONS=105} [2024-06-27 17:15:45,761 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-06-27 17:15:45,761 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 105 transitions, 1073 flow [2024-06-27 17:15:45,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:45,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:45,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:15:45,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:15:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:45,979 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:45,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1044354041, now seen corresponding path program 4 times [2024-06-27 17:15:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:45,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813121005] [2024-06-27 17:15:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:45,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:46,204 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 17:15:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813121005] [2024-06-27 17:15:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813121005] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677280948] [2024-06-27 17:15:46,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:15:46,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:46,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:46,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:15:46,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:15:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:15:46,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:15:46,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:46,342 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 17:15:46,565 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 17:15:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:46,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:51,578 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 33 treesize of output 29 [2024-06-27 17:15:51,587 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:15:51,588 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 62 treesize of output 41 [2024-06-27 17:15:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:15:51,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677280948] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:51,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:51,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-06-27 17:15:51,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059865906] [2024-06-27 17:15:51,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:51,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:15:51,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:15:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:15:51,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:15:51,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 105 transitions, 1073 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:51,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:51,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:15:51,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:55,525 INFO L124 PetriNetUnfolderBase]: 284/563 cut-off events. [2024-06-27 17:15:55,525 INFO L125 PetriNetUnfolderBase]: For 3524/3524 co-relation queries the response was YES. [2024-06-27 17:15:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 563 events. 284/563 cut-off events. For 3524/3524 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2591 event pairs, 30 based on Foata normal form. 8/568 useless extension candidates. Maximal degree in co-relation 2941. Up to 312 conditions per place. [2024-06-27 17:15:55,531 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 81 selfloop transitions, 76 changer transitions 11/169 dead transitions. [2024-06-27 17:15:55,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 169 transitions, 1784 flow [2024-06-27 17:15:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:15:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:15:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 178 transitions. [2024-06-27 17:15:55,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869565217391304 [2024-06-27 17:15:55,534 INFO L175 Difference]: Start difference. First operand has 127 places, 105 transitions, 1073 flow. Second operand 23 states and 178 transitions. [2024-06-27 17:15:55,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 169 transitions, 1784 flow [2024-06-27 17:15:55,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 169 transitions, 1605 flow, removed 23 selfloop flow, removed 21 redundant places. [2024-06-27 17:15:55,553 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1260 flow [2024-06-27 17:15:55,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1260, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-06-27 17:15:55,553 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2024-06-27 17:15:55,554 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1260 flow [2024-06-27 17:15:55,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:55,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:55,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:15:55,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:15:55,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:55,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:55,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash 271030314, now seen corresponding path program 1 times [2024-06-27 17:15:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:55,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699427546] [2024-06-27 17:15:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:55,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699427546] [2024-06-27 17:15:55,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699427546] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:55,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953211999] [2024-06-27 17:15:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:55,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:55,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:15:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:56,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:15:56,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:56,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:56,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953211999] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:56,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:56,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:15:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315030153] [2024-06-27 17:15:56,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:15:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:56,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:15:56,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:15:56,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:15:56,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1260 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:56,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:56,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:15:56,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:57,630 INFO L124 PetriNetUnfolderBase]: 291/573 cut-off events. [2024-06-27 17:15:57,630 INFO L125 PetriNetUnfolderBase]: For 2614/2614 co-relation queries the response was YES. [2024-06-27 17:15:57,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 573 events. 291/573 cut-off events. For 2614/2614 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2655 event pairs, 21 based on Foata normal form. 3/558 useless extension candidates. Maximal degree in co-relation 2920. Up to 155 conditions per place. [2024-06-27 17:15:57,634 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 106 selfloop transitions, 83 changer transitions 0/190 dead transitions. [2024-06-27 17:15:57,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2073 flow [2024-06-27 17:15:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:15:57,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:15:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-06-27 17:15:57,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 17:15:57,636 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1260 flow. Second operand 16 states and 134 transitions. [2024-06-27 17:15:57,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2073 flow [2024-06-27 17:15:57,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 190 transitions, 1799 flow, removed 90 selfloop flow, removed 15 redundant places. [2024-06-27 17:15:57,654 INFO L231 Difference]: Finished difference. Result has 128 places, 146 transitions, 1520 flow [2024-06-27 17:15:57,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1520, PETRI_PLACES=128, PETRI_TRANSITIONS=146} [2024-06-27 17:15:57,655 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2024-06-27 17:15:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 146 transitions, 1520 flow [2024-06-27 17:15:57,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:57,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:15:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:15:57,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:15:57,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:15:57,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:15:57,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:15:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1719759656, now seen corresponding path program 2 times [2024-06-27 17:15:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:15:57,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062149634] [2024-06-27 17:15:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:15:57,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:15:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:15:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:58,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:15:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062149634] [2024-06-27 17:15:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062149634] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:15:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092172475] [2024-06-27 17:15:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:15:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:15:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:15:58,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:15:58,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:15:58,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:15:58,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:15:58,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:15:58,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:15:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:58,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:15:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:15:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092172475] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:15:58,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:15:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:15:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943088186] [2024-06-27 17:15:58,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:15:58,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:15:58,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:15:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:15:58,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:15:58,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:15:58,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 1520 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:15:58,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:15:58,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:15:58,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:15:59,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:16:00,276 INFO L124 PetriNetUnfolderBase]: 379/760 cut-off events. [2024-06-27 17:16:00,277 INFO L125 PetriNetUnfolderBase]: For 5405/5405 co-relation queries the response was YES. [2024-06-27 17:16:00,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4367 conditions, 760 events. 379/760 cut-off events. For 5405/5405 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3903 event pairs, 49 based on Foata normal form. 24/779 useless extension candidates. Maximal degree in co-relation 4184. Up to 226 conditions per place. [2024-06-27 17:16:00,284 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 113 changer transitions 0/248 dead transitions. [2024-06-27 17:16:00,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 248 transitions, 2925 flow [2024-06-27 17:16:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:16:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:16:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 183 transitions. [2024-06-27 17:16:00,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-27 17:16:00,286 INFO L175 Difference]: Start difference. First operand has 128 places, 146 transitions, 1520 flow. Second operand 20 states and 183 transitions. [2024-06-27 17:16:00,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 248 transitions, 2925 flow [2024-06-27 17:16:00,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 248 transitions, 2659 flow, removed 104 selfloop flow, removed 3 redundant places. [2024-06-27 17:16:00,312 INFO L231 Difference]: Finished difference. Result has 155 places, 189 transitions, 2318 flow [2024-06-27 17:16:00,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2318, PETRI_PLACES=155, PETRI_TRANSITIONS=189} [2024-06-27 17:16:00,312 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-06-27 17:16:00,313 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 189 transitions, 2318 flow [2024-06-27 17:16:00,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:16:00,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:16:00,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:16:00,330 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 17:16:00,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:16:00,528 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:16:00,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:16:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash 745309994, now seen corresponding path program 5 times [2024-06-27 17:16:00,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:16:00,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475245471] [2024-06-27 17:16:00,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:16:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:16:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:16:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:16:00,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:16:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475245471] [2024-06-27 17:16:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475245471] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:16:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531244345] [2024-06-27 17:16:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:16:00,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:16:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:16:00,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:16:00,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:16:00,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:16:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:16:00,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 17:16:00,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:16:00,857 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 17:16:00,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:16:01,164 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 17:16:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:01,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:16:06,033 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 47 treesize of output 43 [2024-06-27 17:16:06,046 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:16:06,046 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 444 treesize of output 351 [2024-06-27 17:16:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:06,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531244345] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:16:06,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:16:06,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-06-27 17:16:06,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726265666] [2024-06-27 17:16:06,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:16:06,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:16:06,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:16:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:16:06,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-06-27 17:16:06,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:16:06,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 189 transitions, 2318 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:16:06,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:16:06,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:16:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:16:13,463 INFO L124 PetriNetUnfolderBase]: 431/850 cut-off events. [2024-06-27 17:16:13,463 INFO L125 PetriNetUnfolderBase]: For 5430/5430 co-relation queries the response was YES. [2024-06-27 17:16:13,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5001 conditions, 850 events. 431/850 cut-off events. For 5430/5430 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4439 event pairs, 12 based on Foata normal form. 4/849 useless extension candidates. Maximal degree in co-relation 4800. Up to 232 conditions per place. [2024-06-27 17:16:13,472 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 130 selfloop transitions, 129 changer transitions 5/265 dead transitions. [2024-06-27 17:16:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 265 transitions, 3297 flow [2024-06-27 17:16:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:16:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:16:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 170 transitions. [2024-06-27 17:16:13,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2024-06-27 17:16:13,474 INFO L175 Difference]: Start difference. First operand has 155 places, 189 transitions, 2318 flow. Second operand 19 states and 170 transitions. [2024-06-27 17:16:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 265 transitions, 3297 flow [2024-06-27 17:16:13,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 265 transitions, 2914 flow, removed 171 selfloop flow, removed 5 redundant places. [2024-06-27 17:16:13,519 INFO L231 Difference]: Finished difference. Result has 171 places, 211 transitions, 2460 flow [2024-06-27 17:16:13,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2460, PETRI_PLACES=171, PETRI_TRANSITIONS=211} [2024-06-27 17:16:13,520 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2024-06-27 17:16:13,521 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 211 transitions, 2460 flow [2024-06-27 17:16:13,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:16:13,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:16:13,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:16:13,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:16:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:16:13,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:16:13,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:16:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1609546904, now seen corresponding path program 6 times [2024-06-27 17:16:13,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:16:13,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488710300] [2024-06-27 17:16:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:16:13,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:16:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:16:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:16:13,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:16:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488710300] [2024-06-27 17:16:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488710300] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:16:13,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081636334] [2024-06-27 17:16:13,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:16:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:16:13,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:16:13,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:16:13,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:16:14,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:16:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:16:14,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 17:16:14,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:16:14,060 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 17:16:14,083 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 17:16:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:16:14,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:16:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:16:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081636334] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:16:25,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:16:25,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 19 [2024-06-27 17:16:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518011480] [2024-06-27 17:16:25,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:16:25,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:16:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:16:25,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:16:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:16:25,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:16:25,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 211 transitions, 2460 flow. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:16:25,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:16:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:16:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:16:26,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:16:37,553 WARN L293 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:16:55,371 WARN L293 SmtUtils]: Spent 17.75s on a formula simplification. DAG size of input: 116 DAG size of output: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:17:14,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:16,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:38,039 WARN L293 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 104 DAG size of output: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:17:42,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:17:52,264 INFO L124 PetriNetUnfolderBase]: 638/1238 cut-off events. [2024-06-27 17:17:52,265 INFO L125 PetriNetUnfolderBase]: For 5818/5818 co-relation queries the response was YES. [2024-06-27 17:17:52,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7093 conditions, 1238 events. 638/1238 cut-off events. For 5818/5818 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7073 event pairs, 5 based on Foata normal form. 9/1239 useless extension candidates. Maximal degree in co-relation 6968. Up to 369 conditions per place. [2024-06-27 17:17:52,278 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 196 selfloop transitions, 204 changer transitions 15/416 dead transitions. [2024-06-27 17:17:52,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 416 transitions, 4872 flow [2024-06-27 17:17:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-06-27 17:17:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-06-27 17:17:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 331 transitions. [2024-06-27 17:17:52,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355263157894737 [2024-06-27 17:17:52,280 INFO L175 Difference]: Start difference. First operand has 171 places, 211 transitions, 2460 flow. Second operand 38 states and 331 transitions. [2024-06-27 17:17:52,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 416 transitions, 4872 flow [2024-06-27 17:17:52,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 416 transitions, 4503 flow, removed 116 selfloop flow, removed 6 redundant places. [2024-06-27 17:17:52,325 INFO L231 Difference]: Finished difference. Result has 217 places, 297 transitions, 3854 flow [2024-06-27 17:17:52,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2244, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3854, PETRI_PLACES=217, PETRI_TRANSITIONS=297} [2024-06-27 17:17:52,327 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 196 predicate places. [2024-06-27 17:17:52,327 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 297 transitions, 3854 flow [2024-06-27 17:17:52,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:17:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:17:52,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:17:52,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:17:52,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:17:52,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:17:52,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:17:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1669710776, now seen corresponding path program 3 times [2024-06-27 17:17:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:17:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238712569] [2024-06-27 17:17:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:17:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:17:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:17:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:17:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238712569] [2024-06-27 17:17:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238712569] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:17:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402512592] [2024-06-27 17:17:52,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:17:52,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:17:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:17:52,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:17:52,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:17:53,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:17:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:17:53,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:17:53,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:17:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:53,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:17:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:53,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402512592] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:17:53,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:17:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:17:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70229741] [2024-06-27 17:17:53,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:17:53,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:17:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:17:53,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:17:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:17:53,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:17:53,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 297 transitions, 3854 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:17:53,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:17:53,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:17:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:17:54,323 INFO L124 PetriNetUnfolderBase]: 618/1160 cut-off events. [2024-06-27 17:17:54,323 INFO L125 PetriNetUnfolderBase]: For 6663/6663 co-relation queries the response was YES. [2024-06-27 17:17:54,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7170 conditions, 1160 events. 618/1160 cut-off events. For 6663/6663 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6303 event pairs, 99 based on Foata normal form. 14/1168 useless extension candidates. Maximal degree in co-relation 7031. Up to 534 conditions per place. [2024-06-27 17:17:54,336 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 199 selfloop transitions, 136 changer transitions 0/336 dead transitions. [2024-06-27 17:17:54,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 336 transitions, 4694 flow [2024-06-27 17:17:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 17:17:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 17:17:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 154 transitions. [2024-06-27 17:17:54,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45294117647058824 [2024-06-27 17:17:54,338 INFO L175 Difference]: Start difference. First operand has 217 places, 297 transitions, 3854 flow. Second operand 17 states and 154 transitions. [2024-06-27 17:17:54,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 336 transitions, 4694 flow [2024-06-27 17:17:54,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 336 transitions, 4333 flow, removed 93 selfloop flow, removed 21 redundant places. [2024-06-27 17:17:54,401 INFO L231 Difference]: Finished difference. Result has 211 places, 296 transitions, 3871 flow [2024-06-27 17:17:54,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3451, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3871, PETRI_PLACES=211, PETRI_TRANSITIONS=296} [2024-06-27 17:17:54,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2024-06-27 17:17:54,402 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 296 transitions, 3871 flow [2024-06-27 17:17:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:17:54,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:17:54,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:17:54,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 17:17:54,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:17:54,612 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:17:54,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:17:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 514347838, now seen corresponding path program 4 times [2024-06-27 17:17:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:17:54,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737585133] [2024-06-27 17:17:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:17:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:17:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:17:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:54,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:17:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737585133] [2024-06-27 17:17:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737585133] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:17:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955153257] [2024-06-27 17:17:54,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:17:54,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:17:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:17:54,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:17:54,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:17:54,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:17:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:17:54,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:17:54,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:17:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:55,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:17:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955153257] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:17:55,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:17:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:17:55,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128669112] [2024-06-27 17:17:55,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:17:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:17:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:17:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:17:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:17:55,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:17:55,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 296 transitions, 3871 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:17:55,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:17:55,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:17:55,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:17:56,082 INFO L124 PetriNetUnfolderBase]: 771/1453 cut-off events. [2024-06-27 17:17:56,082 INFO L125 PetriNetUnfolderBase]: For 9516/9516 co-relation queries the response was YES. [2024-06-27 17:17:56,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1453 events. 771/1453 cut-off events. For 9516/9516 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8287 event pairs, 107 based on Foata normal form. 33/1482 useless extension candidates. Maximal degree in co-relation 8837. Up to 573 conditions per place. [2024-06-27 17:17:56,096 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 197 selfloop transitions, 210 changer transitions 0/408 dead transitions. [2024-06-27 17:17:56,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 408 transitions, 5878 flow [2024-06-27 17:17:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:17:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:17:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 160 transitions. [2024-06-27 17:17:56,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-06-27 17:17:56,101 INFO L175 Difference]: Start difference. First operand has 211 places, 296 transitions, 3871 flow. Second operand 19 states and 160 transitions. [2024-06-27 17:17:56,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 408 transitions, 5878 flow [2024-06-27 17:17:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 408 transitions, 5534 flow, removed 65 selfloop flow, removed 9 redundant places. [2024-06-27 17:17:56,160 INFO L231 Difference]: Finished difference. Result has 229 places, 356 transitions, 5116 flow [2024-06-27 17:17:56,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5116, PETRI_PLACES=229, PETRI_TRANSITIONS=356} [2024-06-27 17:17:56,161 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2024-06-27 17:17:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 356 transitions, 5116 flow [2024-06-27 17:17:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:17:56,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:17:56,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:17:56,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:17:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:17:56,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:17:56,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:17:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -408994416, now seen corresponding path program 7 times [2024-06-27 17:17:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:17:56,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585716840] [2024-06-27 17:17:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:17:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:17:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:17:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:17:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:17:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585716840] [2024-06-27 17:17:56,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585716840] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:17:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516112658] [2024-06-27 17:17:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:17:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:17:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:17:56,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:17:56,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:17:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:17:56,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:17:56,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:17:56,644 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 17:17:56,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:18:18,465 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:18:34,524 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 6 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:18:42,534 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:18:46,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:18:46,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 108 [2024-06-27 17:18:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:18:46,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:18:56,433 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 47 treesize of output 43 [2024-06-27 17:18:56,458 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 17:18:56,458 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 444 treesize of output 351 [2024-06-27 17:18:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:18:56,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516112658] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:18:56,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:18:56,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-06-27 17:18:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66059592] [2024-06-27 17:18:56,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:18:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:18:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:18:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:18:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-06-27 17:18:56,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:18:56,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 356 transitions, 5116 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:18:56,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:18:56,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:18:56,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:18:58,028 INFO L124 PetriNetUnfolderBase]: 796/1531 cut-off events. [2024-06-27 17:18:58,028 INFO L125 PetriNetUnfolderBase]: For 10883/10883 co-relation queries the response was YES. [2024-06-27 17:18:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 1531 events. 796/1531 cut-off events. For 10883/10883 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 9048 event pairs, 9 based on Foata normal form. 3/1534 useless extension candidates. Maximal degree in co-relation 9844. Up to 854 conditions per place. [2024-06-27 17:18:58,043 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 190 selfloop transitions, 219 changer transitions 5/415 dead transitions. [2024-06-27 17:18:58,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 415 transitions, 6460 flow [2024-06-27 17:18:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:18:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:18:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 143 transitions. [2024-06-27 17:18:58,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763157894736842 [2024-06-27 17:18:58,052 INFO L175 Difference]: Start difference. First operand has 229 places, 356 transitions, 5116 flow. Second operand 19 states and 143 transitions. [2024-06-27 17:18:58,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 415 transitions, 6460 flow [2024-06-27 17:18:58,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 415 transitions, 5963 flow, removed 177 selfloop flow, removed 8 redundant places. [2024-06-27 17:18:58,162 INFO L231 Difference]: Finished difference. Result has 243 places, 382 transitions, 5622 flow [2024-06-27 17:18:58,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5622, PETRI_PLACES=243, PETRI_TRANSITIONS=382} [2024-06-27 17:18:58,163 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-06-27 17:18:58,163 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 382 transitions, 5622 flow [2024-06-27 17:18:58,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:18:58,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:18:58,163 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:18:58,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 17:18:58,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 17:18:58,364 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:18:58,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:18:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 545962692, now seen corresponding path program 5 times [2024-06-27 17:18:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:18:58,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466337579] [2024-06-27 17:18:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:18:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:18:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:18:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:18:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:18:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466337579] [2024-06-27 17:18:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466337579] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:18:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44752136] [2024-06-27 17:18:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:18:58,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:18:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:18:58,544 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 17:18:58,549 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 17:18:58,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:18:58,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:18:58,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:18:58,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:18:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:18:58,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:18:58,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:18:58,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44752136] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:18:58,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:18:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:18:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621874322] [2024-06-27 17:18:58,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:18:58,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:18:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:18:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:18:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:18:58,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:18:58,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 382 transitions, 5622 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:18:58,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:18:58,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:18:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:00,357 INFO L124 PetriNetUnfolderBase]: 1073/2069 cut-off events. [2024-06-27 17:19:00,358 INFO L125 PetriNetUnfolderBase]: For 20205/20205 co-relation queries the response was YES. [2024-06-27 17:19:00,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14298 conditions, 2069 events. 1073/2069 cut-off events. For 20205/20205 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13067 event pairs, 46 based on Foata normal form. 10/2079 useless extension candidates. Maximal degree in co-relation 14161. Up to 519 conditions per place. [2024-06-27 17:19:00,373 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 262 selfloop transitions, 308 changer transitions 0/571 dead transitions. [2024-06-27 17:19:00,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 571 transitions, 9356 flow [2024-06-27 17:19:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 17:19:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 17:19:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 181 transitions. [2024-06-27 17:19:00,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763157894736842 [2024-06-27 17:19:00,376 INFO L175 Difference]: Start difference. First operand has 243 places, 382 transitions, 5622 flow. Second operand 19 states and 181 transitions. [2024-06-27 17:19:00,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 571 transitions, 9356 flow [2024-06-27 17:19:00,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 571 transitions, 8959 flow, removed 165 selfloop flow, removed 11 redundant places. [2024-06-27 17:19:00,514 INFO L231 Difference]: Finished difference. Result has 259 places, 475 transitions, 7954 flow [2024-06-27 17:19:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7954, PETRI_PLACES=259, PETRI_TRANSITIONS=475} [2024-06-27 17:19:00,515 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 238 predicate places. [2024-06-27 17:19:00,515 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 475 transitions, 7954 flow [2024-06-27 17:19:00,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:00,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:00,529 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 17:19:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:00,716 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:00,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 495913812, now seen corresponding path program 6 times [2024-06-27 17:19:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:00,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763070653] [2024-06-27 17:19:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763070653] [2024-06-27 17:19:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763070653] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117313989] [2024-06-27 17:19:00,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:19:00,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:00,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:00,912 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 17:19:00,940 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 17:19:01,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:19:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:01,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:19:01,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:01,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:01,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117313989] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:01,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:01,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:19:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275875735] [2024-06-27 17:19:01,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:01,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:19:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:19:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:19:01,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:01,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 475 transitions, 7954 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:01,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:01,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:01,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:02,598 INFO L124 PetriNetUnfolderBase]: 1059/2031 cut-off events. [2024-06-27 17:19:02,598 INFO L125 PetriNetUnfolderBase]: For 21883/21883 co-relation queries the response was YES. [2024-06-27 17:19:02,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14913 conditions, 2031 events. 1059/2031 cut-off events. For 21883/21883 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12695 event pairs, 46 based on Foata normal form. 18/2049 useless extension candidates. Maximal degree in co-relation 14764. Up to 519 conditions per place. [2024-06-27 17:19:02,617 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 248 selfloop transitions, 310 changer transitions 0/559 dead transitions. [2024-06-27 17:19:02,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 559 transitions, 9892 flow [2024-06-27 17:19:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 17:19:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 17:19:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-06-27 17:19:02,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 17:19:02,619 INFO L175 Difference]: Start difference. First operand has 259 places, 475 transitions, 7954 flow. Second operand 21 states and 181 transitions. [2024-06-27 17:19:02,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 559 transitions, 9892 flow [2024-06-27 17:19:02,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 559 transitions, 9388 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-27 17:19:02,797 INFO L231 Difference]: Finished difference. Result has 277 places, 477 transitions, 8131 flow [2024-06-27 17:19:02,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7329, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8131, PETRI_PLACES=277, PETRI_TRANSITIONS=477} [2024-06-27 17:19:02,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 256 predicate places. [2024-06-27 17:19:02,798 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 477 transitions, 8131 flow [2024-06-27 17:19:02,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:02,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:02,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:02,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 17:19:03,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-06-27 17:19:03,012 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:03,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 564396718, now seen corresponding path program 7 times [2024-06-27 17:19:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:03,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171389216] [2024-06-27 17:19:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171389216] [2024-06-27 17:19:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171389216] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12118356] [2024-06-27 17:19:03,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:19:03,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:03,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:03,164 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 17:19:03,186 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 17:19:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:03,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:19:03,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:03,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:03,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12118356] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:03,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:03,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 17:19:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342173451] [2024-06-27 17:19:03,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:03,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 17:19:03,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 17:19:03,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-27 17:19:03,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:03,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 477 transitions, 8131 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:03,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:03,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:03,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:04,371 INFO L124 PetriNetUnfolderBase]: 1051/1987 cut-off events. [2024-06-27 17:19:04,371 INFO L125 PetriNetUnfolderBase]: For 20465/20465 co-relation queries the response was YES. [2024-06-27 17:19:04,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15108 conditions, 1987 events. 1051/1987 cut-off events. For 20465/20465 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12098 event pairs, 185 based on Foata normal form. 14/2001 useless extension candidates. Maximal degree in co-relation 14953. Up to 1051 conditions per place. [2024-06-27 17:19:04,391 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 267 selfloop transitions, 242 changer transitions 0/510 dead transitions. [2024-06-27 17:19:04,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 510 transitions, 9404 flow [2024-06-27 17:19:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:19:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:19:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 124 transitions. [2024-06-27 17:19:04,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 17:19:04,392 INFO L175 Difference]: Start difference. First operand has 277 places, 477 transitions, 8131 flow. Second operand 14 states and 124 transitions. [2024-06-27 17:19:04,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 510 transitions, 9404 flow [2024-06-27 17:19:04,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 510 transitions, 8732 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-27 17:19:04,635 INFO L231 Difference]: Finished difference. Result has 279 places, 475 transitions, 7975 flow [2024-06-27 17:19:04,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7975, PETRI_PLACES=279, PETRI_TRANSITIONS=475} [2024-06-27 17:19:04,636 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 258 predicate places. [2024-06-27 17:19:04,636 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 475 transitions, 7975 flow [2024-06-27 17:19:04,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:04,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:04,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:04,656 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 17:19:04,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:04,852 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:04,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:04,853 INFO L85 PathProgramCache]: Analyzing trace with hash -313506484, now seen corresponding path program 8 times [2024-06-27 17:19:04,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:04,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788373608] [2024-06-27 17:19:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:04,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:05,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788373608] [2024-06-27 17:19:05,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788373608] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661834151] [2024-06-27 17:19:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:19:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:05,036 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 17:19:05,064 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 17:19:05,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:19:05,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:05,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:19:05,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:05,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:19:05,690 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 123 treesize of output 115 [2024-06-27 17:19:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:05,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:05,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:19:05,888 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 147 treesize of output 139 [2024-06-27 17:19:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:06,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661834151] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:06,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:06,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:19:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304099608] [2024-06-27 17:19:06,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:06,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:19:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:19:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:19:06,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:06,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 475 transitions, 7975 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:06,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:06,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:06,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:07,507 INFO L124 PetriNetUnfolderBase]: 1048/1966 cut-off events. [2024-06-27 17:19:07,507 INFO L125 PetriNetUnfolderBase]: For 20128/20128 co-relation queries the response was YES. [2024-06-27 17:19:07,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14809 conditions, 1966 events. 1048/1966 cut-off events. For 20128/20128 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11862 event pairs, 48 based on Foata normal form. 6/1972 useless extension candidates. Maximal degree in co-relation 14656. Up to 615 conditions per place. [2024-06-27 17:19:07,525 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 241 selfloop transitions, 293 changer transitions 0/535 dead transitions. [2024-06-27 17:19:07,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 535 transitions, 9732 flow [2024-06-27 17:19:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:19:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:19:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 140 transitions. [2024-06-27 17:19:07,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 17:19:07,527 INFO L175 Difference]: Start difference. First operand has 279 places, 475 transitions, 7975 flow. Second operand 15 states and 140 transitions. [2024-06-27 17:19:07,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 535 transitions, 9732 flow [2024-06-27 17:19:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 535 transitions, 9232 flow, removed 36 selfloop flow, removed 12 redundant places. [2024-06-27 17:19:07,707 INFO L231 Difference]: Finished difference. Result has 280 places, 481 transitions, 8264 flow [2024-06-27 17:19:07,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8264, PETRI_PLACES=280, PETRI_TRANSITIONS=481} [2024-06-27 17:19:07,707 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2024-06-27 17:19:07,707 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 481 transitions, 8264 flow [2024-06-27 17:19:07,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:07,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:07,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:07,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:07,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:07,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1282735096, now seen corresponding path program 8 times [2024-06-27 17:19:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:07,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299372394] [2024-06-27 17:19:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:07,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299372394] [2024-06-27 17:19:08,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299372394] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:08,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111784653] [2024-06-27 17:19:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:19:08,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:08,066 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:08,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:19:08,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:19:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:08,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:19:08,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:08,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:19:08,637 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-06-27 17:19:08,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-06-27 17:19:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:19:08,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:09,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111784653] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:09,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:09,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 7] total 19 [2024-06-27 17:19:09,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670739376] [2024-06-27 17:19:09,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:09,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:19:09,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:09,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:19:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:19:09,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:09,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 481 transitions, 8264 flow. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:09,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:09,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:09,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:10,654 INFO L124 PetriNetUnfolderBase]: 1082/2050 cut-off events. [2024-06-27 17:19:10,654 INFO L125 PetriNetUnfolderBase]: For 21441/21441 co-relation queries the response was YES. [2024-06-27 17:19:10,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15623 conditions, 2050 events. 1082/2050 cut-off events. For 21441/21441 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12643 event pairs, 53 based on Foata normal form. 5/2055 useless extension candidates. Maximal degree in co-relation 15458. Up to 1173 conditions per place. [2024-06-27 17:19:10,672 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 316 selfloop transitions, 235 changer transitions 3/555 dead transitions. [2024-06-27 17:19:10,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 555 transitions, 10112 flow [2024-06-27 17:19:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:19:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:19:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 179 transitions. [2024-06-27 17:19:10,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38913043478260867 [2024-06-27 17:19:10,674 INFO L175 Difference]: Start difference. First operand has 280 places, 481 transitions, 8264 flow. Second operand 23 states and 179 transitions. [2024-06-27 17:19:10,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 555 transitions, 10112 flow [2024-06-27 17:19:10,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 555 transitions, 9804 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-27 17:19:10,893 INFO L231 Difference]: Finished difference. Result has 303 places, 505 transitions, 9142 flow [2024-06-27 17:19:10,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7973, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9142, PETRI_PLACES=303, PETRI_TRANSITIONS=505} [2024-06-27 17:19:10,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 282 predicate places. [2024-06-27 17:19:10,894 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 505 transitions, 9142 flow [2024-06-27 17:19:10,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:10,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:10,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:10,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-06-27 17:19:11,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:11,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 380139525, now seen corresponding path program 9 times [2024-06-27 17:19:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:11,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428444173] [2024-06-27 17:19:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:11,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:19:11,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:11,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428444173] [2024-06-27 17:19:11,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428444173] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:11,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842310386] [2024-06-27 17:19:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:19:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:11,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:11,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:19:11,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:19:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:11,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 17:19:11,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:11,996 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 17:19:24,945 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:19:33,053 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 17:19:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:19:33,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:37,724 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 87 treesize of output 77 [2024-06-27 17:19:37,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:19:37,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 192 [2024-06-27 17:19:39,448 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 170 treesize of output 150 [2024-06-27 17:19:39,464 INFO L349 Elim1Store]: treesize reduction 156, result has 0.6 percent of original size [2024-06-27 17:19:39,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 677 treesize of output 1 [2024-06-27 17:19:39,474 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 33 treesize of output 29 [2024-06-27 17:19:39,481 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-27 17:19:39,481 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 62 treesize of output 1 [2024-06-27 17:19:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:19:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842310386] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:19:39,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:19:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-06-27 17:19:39,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309729431] [2024-06-27 17:19:39,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:19:39,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:19:39,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:19:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:19:39,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:19:39,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:19:39,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 505 transitions, 9142 flow. Second operand has 22 states, 22 states have (on average 4.681818181818182) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:39,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:19:39,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:19:39,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:19:41,283 INFO L124 PetriNetUnfolderBase]: 1087/2067 cut-off events. [2024-06-27 17:19:41,283 INFO L125 PetriNetUnfolderBase]: For 23681/23681 co-relation queries the response was YES. [2024-06-27 17:19:41,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16367 conditions, 2067 events. 1087/2067 cut-off events. For 23681/23681 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 12771 event pairs, 80 based on Foata normal form. 4/2071 useless extension candidates. Maximal degree in co-relation 16193. Up to 1867 conditions per place. [2024-06-27 17:19:41,298 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 465 selfloop transitions, 27 changer transitions 39/532 dead transitions. [2024-06-27 17:19:41,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 532 transitions, 10335 flow [2024-06-27 17:19:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:19:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:19:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 113 transitions. [2024-06-27 17:19:41,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-27 17:19:41,300 INFO L175 Difference]: Start difference. First operand has 303 places, 505 transitions, 9142 flow. Second operand 16 states and 113 transitions. [2024-06-27 17:19:41,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 532 transitions, 10335 flow [2024-06-27 17:19:41,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 532 transitions, 10120 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-27 17:19:41,483 INFO L231 Difference]: Finished difference. Result has 309 places, 490 transitions, 8742 flow [2024-06-27 17:19:41,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8927, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8742, PETRI_PLACES=309, PETRI_TRANSITIONS=490} [2024-06-27 17:19:41,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 288 predicate places. [2024-06-27 17:19:41,484 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 490 transitions, 8742 flow [2024-06-27 17:19:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.681818181818182) internal successors, (103), 22 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:19:41,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:19:41,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:19:41,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:19:41,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:41,685 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:19:41,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:19:41,685 INFO L85 PathProgramCache]: Analyzing trace with hash 394277213, now seen corresponding path program 10 times [2024-06-27 17:19:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:19:41,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668634807] [2024-06-27 17:19:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:19:41,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:19:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:19:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:19:41,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:19:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668634807] [2024-06-27 17:19:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668634807] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:19:41,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379518961] [2024-06-27 17:19:41,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:19:41,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:19:41,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:19:41,957 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:19:41,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:19:42,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:19:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:19:42,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 17:19:42,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:19:42,419 INFO L349 Elim1Store]: treesize reduction 25, result has 56.1 percent of original size [2024-06-27 17:19:42,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 196 [2024-06-27 17:19:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:19:42,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:19:52,380 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-06-27 17:19:52,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2024-06-27 17:20:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:20:04,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379518961] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:20:04,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:20:04,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2024-06-27 17:20:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567100230] [2024-06-27 17:20:04,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:20:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:20:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:20:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:20:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:20:04,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:20:04,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 490 transitions, 8742 flow. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:20:04,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:20:04,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:20:04,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:20:20,808 WARN L293 SmtUtils]: Spent 7.58s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:20:35,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:20:44,973 WARN L293 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 93 DAG size of output: 86 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:20:53,256 WARN L293 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 113 DAG size of output: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:21:06,987 WARN L293 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 101 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:21:24,971 WARN L293 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 95 DAG size of output: 88 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:21:29,185 INFO L124 PetriNetUnfolderBase]: 1491/2841 cut-off events. [2024-06-27 17:21:29,185 INFO L125 PetriNetUnfolderBase]: For 31101/31101 co-relation queries the response was YES. [2024-06-27 17:21:29,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21968 conditions, 2841 events. 1491/2841 cut-off events. For 31101/31101 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 18864 event pairs, 30 based on Foata normal form. 6/2847 useless extension candidates. Maximal degree in co-relation 21793. Up to 720 conditions per place. [2024-06-27 17:21:29,210 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 368 selfloop transitions, 386 changer transitions 13/768 dead transitions. [2024-06-27 17:21:29,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 768 transitions, 13525 flow [2024-06-27 17:21:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 17:21:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 17:21:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 360 transitions. [2024-06-27 17:21:29,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 17:21:29,212 INFO L175 Difference]: Start difference. First operand has 309 places, 490 transitions, 8742 flow. Second operand 41 states and 360 transitions. [2024-06-27 17:21:29,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 768 transitions, 13525 flow [2024-06-27 17:21:29,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 768 transitions, 13158 flow, removed 84 selfloop flow, removed 14 redundant places. [2024-06-27 17:21:29,487 INFO L231 Difference]: Finished difference. Result has 327 places, 631 transitions, 12030 flow [2024-06-27 17:21:29,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8475, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12030, PETRI_PLACES=327, PETRI_TRANSITIONS=631} [2024-06-27 17:21:29,488 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 306 predicate places. [2024-06-27 17:21:29,489 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 631 transitions, 12030 flow [2024-06-27 17:21:29,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:21:29,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:21:29,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:21:29,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 17:21:29,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:21:29,705 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:21:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:21:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash -128160045, now seen corresponding path program 11 times [2024-06-27 17:21:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:21:29,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576817061] [2024-06-27 17:21:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:21:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:21:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:21:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:29,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:21:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576817061] [2024-06-27 17:21:29,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576817061] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:21:29,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822946898] [2024-06-27 17:21:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:21:29,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:21:29,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:21:29,893 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:21:29,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:21:30,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:21:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:21:30,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 17:21:30,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:21:30,154 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 17:21:30,647 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-06-27 17:21:30,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 40 [2024-06-27 17:21:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:21:30,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:21:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:21:44,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822946898] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:21:44,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:21:44,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-06-27 17:21:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759099444] [2024-06-27 17:21:44,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:21:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:21:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:21:44,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:21:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:21:44,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-06-27 17:21:44,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 631 transitions, 12030 flow. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:21:44,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:21:44,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-06-27 17:21:44,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:22:25,986 WARN L293 SmtUtils]: Spent 29.50s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:22:33,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:22:52,047 WARN L293 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 105 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-06-27 17:22:54,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 17:22:56,197 INFO L124 PetriNetUnfolderBase]: 1545/3031 cut-off events. [2024-06-27 17:22:56,198 INFO L125 PetriNetUnfolderBase]: For 43241/43241 co-relation queries the response was YES. [2024-06-27 17:22:56,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25312 conditions, 3031 events. 1545/3031 cut-off events. For 43241/43241 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20969 event pairs, 28 based on Foata normal form. 9/3040 useless extension candidates. Maximal degree in co-relation 25124. Up to 734 conditions per place. [2024-06-27 17:22:56,224 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 306 selfloop transitions, 466 changer transitions 8/781 dead transitions. [2024-06-27 17:22:56,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 781 transitions, 14918 flow [2024-06-27 17:22:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-06-27 17:22:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-06-27 17:22:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 395 transitions. [2024-06-27 17:22:56,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42021276595744683 [2024-06-27 17:22:56,226 INFO L175 Difference]: Start difference. First operand has 327 places, 631 transitions, 12030 flow. Second operand 47 states and 395 transitions. [2024-06-27 17:22:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 781 transitions, 14918 flow [2024-06-27 17:22:56,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 781 transitions, 14070 flow, removed 307 selfloop flow, removed 13 redundant places. [2024-06-27 17:22:56,629 INFO L231 Difference]: Finished difference. Result has 368 places, 677 transitions, 13489 flow [2024-06-27 17:22:56,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11314, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=13489, PETRI_PLACES=368, PETRI_TRANSITIONS=677} [2024-06-27 17:22:56,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 347 predicate places. [2024-06-27 17:22:56,631 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 677 transitions, 13489 flow [2024-06-27 17:22:56,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:22:56,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:22:56,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:22:56,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:22:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:22:56,832 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-06-27 17:22:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:22:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1590183661, now seen corresponding path program 12 times [2024-06-27 17:22:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:22:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176531470] [2024-06-27 17:22:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:22:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:22:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:22:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:22:57,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:22:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176531470] [2024-06-27 17:22:57,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176531470] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:22:57,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922204165] [2024-06-27 17:22:57,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:22:57,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:22:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:22:57,018 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:22:57,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:22:57,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:22:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:22:57,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 17:22:57,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:22:57,238 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 17:22:58,175 INFO L349 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2024-06-27 17:22:58,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 207 [2024-06-27 17:23:10,764 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:23:22,810 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:23:38,922 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:23:59,510 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:24:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:24:07,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:24:16,157 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:24:24,172 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15