./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:17:09,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:17:09,566 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:17:09,571 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:17:09,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:17:09,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:17:09,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:17:09,607 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:17:09,608 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:17:09,609 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:17:09,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:17:09,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:17:09,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:17:09,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:17:09,612 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:17:09,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:17:09,613 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:17:09,613 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:17:09,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:17:09,614 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:17:09,614 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:17:09,618 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:17:09,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:17:09,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:17:09,619 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:17:09,619 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:17:09,619 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:17:09,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:17:09,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:17:09,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:17:09,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:17:09,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:17:09,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:17:09,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:17:09,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:17:09,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:17:09,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:17:09,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:17:09,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:17:09,623 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:17:09,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:17:09,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:17:09,624 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-10-13 07:17:09,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:17:09,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:17:09,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:17:09,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:17:09,922 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:17:09,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-10-13 07:17:11,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:17:11,631 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:17:11,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-10-13 07:17:11,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0c2a436/3681ff60aae64c48984cac09cfa84212/FLAG13ac36def [2024-10-13 07:17:11,982 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c0c2a436/3681ff60aae64c48984cac09cfa84212 [2024-10-13 07:17:11,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:17:11,986 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:17:11,988 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:17:11,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:17:11,995 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:17:11,996 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:11" (1/1) ... [2024-10-13 07:17:11,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad358c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:11, skipping insertion in model container [2024-10-13 07:17:11,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:11" (1/1) ... [2024-10-13 07:17:12,020 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:17:12,217 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2024-10-13 07:17:12,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:17:12,232 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:17:12,252 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2024-10-13 07:17:12,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:17:12,276 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:17:12,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12 WrapperNode [2024-10-13 07:17:12,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:17:12,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:17:12,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:17:12,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:17:12,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,321 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 137 [2024-10-13 07:17:12,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:17:12,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:17:12,327 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:17:12,327 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:17:12,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,338 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,340 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,369 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-10-13 07:17:12,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:17:12,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:17:12,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:17:12,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:17:12,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (1/1) ... [2024-10-13 07:17:12,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:17:12,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:12,439 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) [2024-10-13 07:17:12,442 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 [2024-10-13 07:17:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:17:12,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:17:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:17:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:17:12,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:17:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:17:12,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:17:12,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:17:12,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:17:12,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:17:12,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:17:12,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:17:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:17:12,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:17:12,497 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:17:12,601 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:17:12,603 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:17:12,851 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:17:12,851 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:17:13,137 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:17:13,139 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 07:17:13,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:13 BoogieIcfgContainer [2024-10-13 07:17:13,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:17:13,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:17:13,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:17:13,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:17:13,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:11" (1/3) ... [2024-10-13 07:17:13,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6035e8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:13, skipping insertion in model container [2024-10-13 07:17:13,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:12" (2/3) ... [2024-10-13 07:17:13,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6035e8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:13, skipping insertion in model container [2024-10-13 07:17:13,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:13" (3/3) ... [2024-10-13 07:17:13,151 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-10-13 07:17:13,164 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:17:13,164 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:17:13,164 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:17:13,204 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:17:13,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-13 07:17:13,261 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-13 07:17:13,261 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:17:13,263 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 2. Compared 10 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. [2024-10-13 07:17:13,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-13 07:17:13,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-13 07:17:13,281 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:17:13,290 INFO L333 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, 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;@4a7809a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:17:13,291 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:17:13,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:17:13,305 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-13 07:17:13,305 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:17:13,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:13,306 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:13,306 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:13,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash 475305122, now seen corresponding path program 1 times [2024-10-13 07:17:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:13,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838667370] [2024-10-13 07:17:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:13,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:13,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838667370] [2024-10-13 07:17:13,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838667370] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:13,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:13,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:17:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426348995] [2024-10-13 07:17:13,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:13,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:17:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:17:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:17:13,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:13,803 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) [2024-10-13 07:17:13,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:13,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:13,874 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-13 07:17:13,875 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 07:17:13,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. 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. [2024-10-13 07:17:13,879 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-13 07:17:13,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-13 07:17:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:17:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:17:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-13 07:17:13,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-13 07:17:13,891 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-13 07:17:13,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-13 07:17:13,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:17:13,896 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-13 07:17:13,898 INFO L260 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} [2024-10-13 07:17:13,904 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-13 07:17:13,905 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-13 07:17:13,905 INFO L472 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) [2024-10-13 07:17:13,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:13,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:13,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:17:13,906 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:13,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash 213829483, now seen corresponding path program 1 times [2024-10-13 07:17:13,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:13,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087779463] [2024-10-13 07:17:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:14,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:14,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087779463] [2024-10-13 07:17:14,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087779463] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:14,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:14,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:17:14,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769238296] [2024-10-13 07:17:14,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:14,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:17:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:17:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:17:14,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:14,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:14,170 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2024-10-13 07:17:14,171 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 07:17:14,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 126 events. 69/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 321 event pairs, 22 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 255. Up to 72 conditions per place. [2024-10-13 07:17:14,174 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 24 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2024-10-13 07:17:14,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 29 transitions, 131 flow [2024-10-13 07:17:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:17:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:17:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-10-13 07:17:14,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-10-13 07:17:14,177 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-10-13 07:17:14,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 29 transitions, 131 flow [2024-10-13 07:17:14,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 29 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:17:14,179 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2024-10-13 07:17:14,179 INFO L260 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=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2024-10-13 07:17:14,180 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2024-10-13 07:17:14,180 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2024-10-13 07:17:14,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:14,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:14,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:14,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:17:14,182 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:14,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2060278534, now seen corresponding path program 1 times [2024-10-13 07:17:14,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:14,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358211597] [2024-10-13 07:17:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:14,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:14,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358211597] [2024-10-13 07:17:14,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358211597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:14,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:17:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609538702] [2024-10-13 07:17:14,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:14,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:17:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:17:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:17:14,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:14,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:14,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:14,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:14,590 INFO L124 PetriNetUnfolderBase]: 86/167 cut-off events. [2024-10-13 07:17:14,591 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-13 07:17:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 167 events. 86/167 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 536 event pairs, 24 based on Foata normal form. 11/177 useless extension candidates. Maximal degree in co-relation 385. Up to 83 conditions per place. [2024-10-13 07:17:14,592 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 29 selfloop transitions, 7 changer transitions 10/47 dead transitions. [2024-10-13 07:17:14,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 47 transitions, 232 flow [2024-10-13 07:17:14,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:17:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:17:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-10-13 07:17:14,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-10-13 07:17:14,595 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 6 states and 63 transitions. [2024-10-13 07:17:14,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 47 transitions, 232 flow [2024-10-13 07:17:14,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:17:14,597 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 122 flow [2024-10-13 07:17:14,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-10-13 07:17:14,598 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-10-13 07:17:14,598 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 122 flow [2024-10-13 07:17:14,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:14,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:14,599 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:14,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:17:14,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:14,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:14,600 INFO L85 PathProgramCache]: Analyzing trace with hash -246905110, now seen corresponding path program 2 times [2024-10-13 07:17:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246822665] [2024-10-13 07:17:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246822665] [2024-10-13 07:17:14,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246822665] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510438064] [2024-10-13 07:17:14,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:17:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:14,769 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) [2024-10-13 07:17:14,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:17:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:17:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:14,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:17:14,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:14,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510438064] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:14,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:17:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2024-10-13 07:17:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175789461] [2024-10-13 07:17:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:14,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:17:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:17:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:17:14,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:14,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:14,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:14,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:14,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:15,138 INFO L124 PetriNetUnfolderBase]: 84/161 cut-off events. [2024-10-13 07:17:15,139 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-10-13 07:17:15,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 161 events. 84/161 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 477 event pairs, 21 based on Foata normal form. 5/165 useless extension candidates. Maximal degree in co-relation 525. Up to 95 conditions per place. [2024-10-13 07:17:15,142 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 6 changer transitions 3/39 dead transitions. [2024-10-13 07:17:15,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 255 flow [2024-10-13 07:17:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:17:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:17:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-10-13 07:17:15,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-13 07:17:15,144 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 122 flow. Second operand 4 states and 45 transitions. [2024-10-13 07:17:15,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 255 flow [2024-10-13 07:17:15,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 240 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-13 07:17:15,149 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 146 flow [2024-10-13 07:17:15,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-10-13 07:17:15,151 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-10-13 07:17:15,151 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 146 flow [2024-10-13 07:17:15,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:15,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:15,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:15,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:17:15,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:15,354 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:15,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1782267732, now seen corresponding path program 3 times [2024-10-13 07:17:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57986753] [2024-10-13 07:17:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:15,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57986753] [2024-10-13 07:17:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57986753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:15,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:17:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035872170] [2024-10-13 07:17:15,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:15,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:17:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:17:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:17:15,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:15,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:15,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:15,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:15,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:15,635 INFO L124 PetriNetUnfolderBase]: 99/191 cut-off events. [2024-10-13 07:17:15,636 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2024-10-13 07:17:15,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 191 events. 99/191 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 583 event pairs, 36 based on Foata normal form. 2/192 useless extension candidates. Maximal degree in co-relation 662. Up to 118 conditions per place. [2024-10-13 07:17:15,640 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 28 selfloop transitions, 10 changer transitions 7/46 dead transitions. [2024-10-13 07:17:15,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 330 flow [2024-10-13 07:17:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:17:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:17:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-10-13 07:17:15,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-10-13 07:17:15,644 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 146 flow. Second operand 5 states and 51 transitions. [2024-10-13 07:17:15,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 330 flow [2024-10-13 07:17:15,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:17:15,649 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 210 flow [2024-10-13 07:17:15,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-10-13 07:17:15,652 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-10-13 07:17:15,652 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 210 flow [2024-10-13 07:17:15,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:15,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:15,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:15,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:17:15,657 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:15,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:15,657 INFO L85 PathProgramCache]: Analyzing trace with hash 782854917, now seen corresponding path program 1 times [2024-10-13 07:17:15,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:15,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954253701] [2024-10-13 07:17:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954253701] [2024-10-13 07:17:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954253701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:15,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:17:15,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550439476] [2024-10-13 07:17:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:15,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:17:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:17:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:17:15,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:15,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:15,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:15,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:15,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:15,858 INFO L124 PetriNetUnfolderBase]: 97/184 cut-off events. [2024-10-13 07:17:15,859 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-13 07:17:15,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 184 events. 97/184 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 532 event pairs, 26 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 743. Up to 133 conditions per place. [2024-10-13 07:17:15,861 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 31 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2024-10-13 07:17:15,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 348 flow [2024-10-13 07:17:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:17:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:17:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-13 07:17:15,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-10-13 07:17:15,863 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 210 flow. Second operand 4 states and 43 transitions. [2024-10-13 07:17:15,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 348 flow [2024-10-13 07:17:15,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 328 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-13 07:17:15,870 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 232 flow [2024-10-13 07:17:15,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-10-13 07:17:15,871 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-10-13 07:17:15,872 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 232 flow [2024-10-13 07:17:15,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:15,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:15,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:15,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 07:17:15,873 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:15,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash 430438170, now seen corresponding path program 4 times [2024-10-13 07:17:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560754038] [2024-10-13 07:17:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560754038] [2024-10-13 07:17:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560754038] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524419480] [2024-10-13 07:17:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:17:16,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:16,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:16,029 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) [2024-10-13 07:17:16,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:17:16,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:17:16,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:16,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:17:16,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:16,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524419480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:16,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2024-10-13 07:17:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883840472] [2024-10-13 07:17:16,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:16,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:17:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:17:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:17:16,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:16,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:16,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:16,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:16,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:16,385 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2024-10-13 07:17:16,386 INFO L125 PetriNetUnfolderBase]: For 558/558 co-relation queries the response was YES. [2024-10-13 07:17:16,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 208 events. 111/208 cut-off events. For 558/558 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 665 event pairs, 25 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 851. Up to 115 conditions per place. [2024-10-13 07:17:16,389 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 39 selfloop transitions, 17 changer transitions 0/57 dead transitions. [2024-10-13 07:17:16,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 454 flow [2024-10-13 07:17:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:17:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:17:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-10-13 07:17:16,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-10-13 07:17:16,391 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 232 flow. Second operand 7 states and 69 transitions. [2024-10-13 07:17:16,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 454 flow [2024-10-13 07:17:16,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:17:16,399 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 296 flow [2024-10-13 07:17:16,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-10-13 07:17:16,400 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-10-13 07:17:16,400 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 296 flow [2024-10-13 07:17:16,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:16,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:16,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:16,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:17:16,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-13 07:17:16,603 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:16,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:16,603 INFO L85 PathProgramCache]: Analyzing trace with hash -573043247, now seen corresponding path program 2 times [2024-10-13 07:17:16,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:16,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632784874] [2024-10-13 07:17:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:16,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:16,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:16,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632784874] [2024-10-13 07:17:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632784874] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:16,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:16,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:17:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095824965] [2024-10-13 07:17:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:16,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:17:16,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:17:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:17:16,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:16,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:16,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:16,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:16,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:16,784 INFO L124 PetriNetUnfolderBase]: 112/204 cut-off events. [2024-10-13 07:17:16,784 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2024-10-13 07:17:16,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 204 events. 112/204 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 621 event pairs, 38 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 968. Up to 153 conditions per place. [2024-10-13 07:17:16,786 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 31 selfloop transitions, 12 changer transitions 2/46 dead transitions. [2024-10-13 07:17:16,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 448 flow [2024-10-13 07:17:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:17:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:17:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-10-13 07:17:16,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-10-13 07:17:16,788 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 296 flow. Second operand 4 states and 42 transitions. [2024-10-13 07:17:16,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 448 flow [2024-10-13 07:17:16,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 425 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-13 07:17:16,792 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 321 flow [2024-10-13 07:17:16,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-10-13 07:17:16,792 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-10-13 07:17:16,793 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 321 flow [2024-10-13 07:17:16,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:16,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:16,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:16,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 07:17:16,794 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:16,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1800701758, now seen corresponding path program 5 times [2024-10-13 07:17:16,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:16,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759865689] [2024-10-13 07:17:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:16,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:16,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759865689] [2024-10-13 07:17:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759865689] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:17:16,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:17:16,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:17:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505990199] [2024-10-13 07:17:16,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:17:16,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:17:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:17:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:17:16,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:16,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:16,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:16,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:16,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:16,997 INFO L124 PetriNetUnfolderBase]: 105/192 cut-off events. [2024-10-13 07:17:16,998 INFO L125 PetriNetUnfolderBase]: For 805/805 co-relation queries the response was YES. [2024-10-13 07:17:16,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 192 events. 105/192 cut-off events. For 805/805 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 556 event pairs, 29 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 937. Up to 127 conditions per place. [2024-10-13 07:17:17,000 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 35 selfloop transitions, 11 changer transitions 2/49 dead transitions. [2024-10-13 07:17:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 477 flow [2024-10-13 07:17:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:17:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:17:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-10-13 07:17:17,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-13 07:17:17,001 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 321 flow. Second operand 5 states and 47 transitions. [2024-10-13 07:17:17,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 477 flow [2024-10-13 07:17:17,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 463 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-13 07:17:17,006 INFO L231 Difference]: Finished difference. Result has 53 places, 38 transitions, 360 flow [2024-10-13 07:17:17,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=53, PETRI_TRANSITIONS=38} [2024-10-13 07:17:17,006 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 32 predicate places. [2024-10-13 07:17:17,007 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 38 transitions, 360 flow [2024-10-13 07:17:17,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:17,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:17,007 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:17,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:17:17,008 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:17,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1001446796, now seen corresponding path program 6 times [2024-10-13 07:17:17,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:17,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144529402] [2024-10-13 07:17:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:17,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:17,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144529402] [2024-10-13 07:17:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144529402] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376935476] [2024-10-13 07:17:17,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:17:17,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:17,102 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) [2024-10-13 07:17:17,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:17:17,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:17:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:17,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:17:17,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:17,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376935476] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:17,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-13 07:17:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012320831] [2024-10-13 07:17:17,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:17,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:17:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:17:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:17:17,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:17,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 38 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:17,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:17,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:17,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:17,369 INFO L124 PetriNetUnfolderBase]: 99/176 cut-off events. [2024-10-13 07:17:17,370 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2024-10-13 07:17:17,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 176 events. 99/176 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 484 event pairs, 29 based on Foata normal form. 5/180 useless extension candidates. Maximal degree in co-relation 941. Up to 127 conditions per place. [2024-10-13 07:17:17,372 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 30 selfloop transitions, 14 changer transitions 1/46 dead transitions. [2024-10-13 07:17:17,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 484 flow [2024-10-13 07:17:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:17:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:17:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-10-13 07:17:17,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-13 07:17:17,376 INFO L175 Difference]: Start difference. First operand has 53 places, 38 transitions, 360 flow. Second operand 5 states and 47 transitions. [2024-10-13 07:17:17,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 484 flow [2024-10-13 07:17:17,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 460 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-13 07:17:17,381 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 352 flow [2024-10-13 07:17:17,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2024-10-13 07:17:17,382 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-10-13 07:17:17,383 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 352 flow [2024-10-13 07:17:17,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:17,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:17,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:17,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:17:17,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:17,588 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:17,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:17,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1907636546, now seen corresponding path program 1 times [2024-10-13 07:17:17,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:17,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121268922] [2024-10-13 07:17:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:17,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121268922] [2024-10-13 07:17:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121268922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534152034] [2024-10-13 07:17:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:17,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:17,887 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) [2024-10-13 07:17:17,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:17:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:17,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 07:17:17,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:18,028 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 [2024-10-13 07:17:18,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:17:18,174 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2024-10-13 07:17:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:18,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:18,523 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 132 treesize of output 116 [2024-10-13 07:17:18,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:17:18,657 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 490 treesize of output 454 [2024-10-13 07:17:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:46,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534152034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:46,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:46,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2024-10-13 07:17:46,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473749949] [2024-10-13 07:17:46,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:46,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:17:46,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:17:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:17:46,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:17:46,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 352 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:46,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:17:46,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:48,361 INFO L124 PetriNetUnfolderBase]: 309/550 cut-off events. [2024-10-13 07:17:48,361 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-10-13 07:17:48,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2871 conditions, 550 events. 309/550 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2362 event pairs, 11 based on Foata normal form. 8/556 useless extension candidates. Maximal degree in co-relation 2536. Up to 245 conditions per place. [2024-10-13 07:17:48,366 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 56 selfloop transitions, 27 changer transitions 88/172 dead transitions. [2024-10-13 07:17:48,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 172 transitions, 1695 flow [2024-10-13 07:17:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 07:17:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 07:17:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 232 transitions. [2024-10-13 07:17:48,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-13 07:17:48,368 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 352 flow. Second operand 29 states and 232 transitions. [2024-10-13 07:17:48,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 172 transitions, 1695 flow [2024-10-13 07:17:48,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 172 transitions, 1533 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-10-13 07:17:48,376 INFO L231 Difference]: Finished difference. Result has 89 places, 49 transitions, 553 flow [2024-10-13 07:17:48,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=553, PETRI_PLACES=89, PETRI_TRANSITIONS=49} [2024-10-13 07:17:48,377 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-10-13 07:17:48,377 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 49 transitions, 553 flow [2024-10-13 07:17:48,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:17:48,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:48,378 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:17:48,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:17:48,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:48,582 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:48,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1931788703, now seen corresponding path program 2 times [2024-10-13 07:17:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453536055] [2024-10-13 07:17:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:17:49,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453536055] [2024-10-13 07:17:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453536055] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516010547] [2024-10-13 07:17:49,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:17:49,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:49,048 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) [2024-10-13 07:17:49,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:17:49,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:17:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:49,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-13 07:17:49,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:49,175 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 [2024-10-13 07:17:49,294 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-13 07:17:49,294 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 [2024-10-13 07:17:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:49,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:49,537 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 [2024-10-13 07:17:49,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:17:49,636 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 682 treesize of output 526 [2024-10-13 07:18:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:18:09,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516010547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:09,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-10-13 07:18:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244569043] [2024-10-13 07:18:09,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:09,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:18:09,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:09,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:18:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:18:09,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:09,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 49 transitions, 553 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:09,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:09,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:11,589 INFO L124 PetriNetUnfolderBase]: 290/510 cut-off events. [2024-10-13 07:18:11,589 INFO L125 PetriNetUnfolderBase]: For 3633/3633 co-relation queries the response was YES. [2024-10-13 07:18:11,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3390 conditions, 510 events. 290/510 cut-off events. For 3633/3633 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2031 event pairs, 11 based on Foata normal form. 37/547 useless extension candidates. Maximal degree in co-relation 3348. Up to 242 conditions per place. [2024-10-13 07:18:11,596 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 78 selfloop transitions, 57 changer transitions 1/137 dead transitions. [2024-10-13 07:18:11,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 137 transitions, 1618 flow [2024-10-13 07:18:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:18:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:18:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 180 transitions. [2024-10-13 07:18:11,598 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-10-13 07:18:11,598 INFO L175 Difference]: Start difference. First operand has 89 places, 49 transitions, 553 flow. Second operand 22 states and 180 transitions. [2024-10-13 07:18:11,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 137 transitions, 1618 flow [2024-10-13 07:18:11,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 137 transitions, 1352 flow, removed 106 selfloop flow, removed 15 redundant places. [2024-10-13 07:18:11,613 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 979 flow [2024-10-13 07:18:11,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=979, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-10-13 07:18:11,614 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2024-10-13 07:18:11,615 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 979 flow [2024-10-13 07:18:11,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:11,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:11,615 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:11,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:18:11,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 07:18:11,817 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:11,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1178291748, now seen corresponding path program 3 times [2024-10-13 07:18:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:11,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021325577] [2024-10-13 07:18:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:11,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:18:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021325577] [2024-10-13 07:18:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021325577] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709719565] [2024-10-13 07:18:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:18:12,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:12,058 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) [2024-10-13 07:18:12,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:18:12,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:18:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:12,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:18:12,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:18:12,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:18:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709719565] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:12,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:12,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 07:18:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419109601] [2024-10-13 07:18:12,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:12,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:18:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:18:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:18:12,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 979 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2024-10-13 07:18:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:13,143 INFO L124 PetriNetUnfolderBase]: 401/698 cut-off events. [2024-10-13 07:18:13,143 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-10-13 07:18:13,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4504 conditions, 698 events. 401/698 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2915 event pairs, 26 based on Foata normal form. 72/770 useless extension candidates. Maximal degree in co-relation 4239. Up to 359 conditions per place. [2024-10-13 07:18:13,152 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 118 selfloop transitions, 44 changer transitions 0/163 dead transitions. [2024-10-13 07:18:13,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 163 transitions, 2152 flow [2024-10-13 07:18:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:18:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:18:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-10-13 07:18:13,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-10-13 07:18:13,154 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 979 flow. Second operand 11 states and 108 transitions. [2024-10-13 07:18:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 163 transitions, 2152 flow [2024-10-13 07:18:13,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 163 transitions, 1984 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-10-13 07:18:13,170 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 1105 flow [2024-10-13 07:18:13,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1105, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2024-10-13 07:18:13,171 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-10-13 07:18:13,172 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 1105 flow [2024-10-13 07:18:13,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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) [2024-10-13 07:18:13,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:13,172 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:13,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:18:13,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:13,373 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:13,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1831800103, now seen corresponding path program 4 times [2024-10-13 07:18:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762494487] [2024-10-13 07:18:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:18:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762494487] [2024-10-13 07:18:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762494487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298421330] [2024-10-13 07:18:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:18:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:15,019 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) [2024-10-13 07:18:15,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:18:15,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:18:15,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:15,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:18:15,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:15,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:18:15,191 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 47 treesize of output 45 [2024-10-13 07:18:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:18:15,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:15,369 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-10-13 07:18:15,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-10-13 07:18:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:18:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298421330] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:15,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:15,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 17 [2024-10-13 07:18:15,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928580071] [2024-10-13 07:18:15,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:15,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:18:15,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:15,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:18:15,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:18:15,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:15,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 1105 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:15,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:15,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:15,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:16,404 INFO L124 PetriNetUnfolderBase]: 707/1244 cut-off events. [2024-10-13 07:18:16,404 INFO L125 PetriNetUnfolderBase]: For 10727/10727 co-relation queries the response was YES. [2024-10-13 07:18:16,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 1244 events. 707/1244 cut-off events. For 10727/10727 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5664 event pairs, 67 based on Foata normal form. 4/1248 useless extension candidates. Maximal degree in co-relation 8436. Up to 614 conditions per place. [2024-10-13 07:18:16,419 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 121 selfloop transitions, 89 changer transitions 2/213 dead transitions. [2024-10-13 07:18:16,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 213 transitions, 2817 flow [2024-10-13 07:18:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:18:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:18:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 180 transitions. [2024-10-13 07:18:16,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-13 07:18:16,421 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 1105 flow. Second operand 20 states and 180 transitions. [2024-10-13 07:18:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 213 transitions, 2817 flow [2024-10-13 07:18:16,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 213 transitions, 2616 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-10-13 07:18:16,445 INFO L231 Difference]: Finished difference. Result has 108 places, 143 transitions, 2009 flow [2024-10-13 07:18:16,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2009, PETRI_PLACES=108, PETRI_TRANSITIONS=143} [2024-10-13 07:18:16,446 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2024-10-13 07:18:16,446 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 143 transitions, 2009 flow [2024-10-13 07:18:16,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:16,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:16,447 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:16,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 07:18:16,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:16,648 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:16,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1041346613, now seen corresponding path program 5 times [2024-10-13 07:18:16,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:16,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086696594] [2024-10-13 07:18:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:18:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086696594] [2024-10-13 07:18:17,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086696594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266669867] [2024-10-13 07:18:17,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:18:17,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:17,757 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) [2024-10-13 07:18:17,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:18:17,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:18:17,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:17,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:18:17,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:18,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:18:18,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2024-10-13 07:18:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:18:18,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:18,324 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-10-13 07:18:18,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-10-13 07:18:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266669867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:18,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2024-10-13 07:18:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022384984] [2024-10-13 07:18:18,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:18,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:18:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:18:18,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:18:18,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:18,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 143 transitions, 2009 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-13 07:18:18,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:18,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:18,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:19,304 INFO L124 PetriNetUnfolderBase]: 985/1738 cut-off events. [2024-10-13 07:18:19,304 INFO L125 PetriNetUnfolderBase]: For 15621/15621 co-relation queries the response was YES. [2024-10-13 07:18:19,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12175 conditions, 1738 events. 985/1738 cut-off events. For 15621/15621 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8711 event pairs, 132 based on Foata normal form. 3/1741 useless extension candidates. Maximal degree in co-relation 12122. Up to 1141 conditions per place. [2024-10-13 07:18:19,324 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 154 selfloop transitions, 85 changer transitions 1/241 dead transitions. [2024-10-13 07:18:19,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 241 transitions, 3551 flow [2024-10-13 07:18:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:18:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:18:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 155 transitions. [2024-10-13 07:18:19,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-10-13 07:18:19,327 INFO L175 Difference]: Start difference. First operand has 108 places, 143 transitions, 2009 flow. Second operand 18 states and 155 transitions. [2024-10-13 07:18:19,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 241 transitions, 3551 flow [2024-10-13 07:18:19,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 241 transitions, 3114 flow, removed 200 selfloop flow, removed 7 redundant places. [2024-10-13 07:18:19,367 INFO L231 Difference]: Finished difference. Result has 122 places, 187 transitions, 2559 flow [2024-10-13 07:18:19,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1656, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2559, PETRI_PLACES=122, PETRI_TRANSITIONS=187} [2024-10-13 07:18:19,368 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2024-10-13 07:18:19,369 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 187 transitions, 2559 flow [2024-10-13 07:18:19,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-13 07:18:19,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:19,369 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:19,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:18:19,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 07:18:19,570 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:19,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:19,571 INFO L85 PathProgramCache]: Analyzing trace with hash -725556751, now seen corresponding path program 6 times [2024-10-13 07:18:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:19,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465948039] [2024-10-13 07:18:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:18:20,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465948039] [2024-10-13 07:18:20,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465948039] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:20,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804536501] [2024-10-13 07:18:20,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:18:20,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:20,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:20,699 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) [2024-10-13 07:18:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:18:20,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:18:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:20,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:18:20,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:20,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:18:20,969 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-10-13 07:18:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:18:20,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:21,145 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-10-13 07:18:21,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-10-13 07:18:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:21,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804536501] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:21,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:21,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2024-10-13 07:18:21,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983621601] [2024-10-13 07:18:21,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:21,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:18:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:18:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:18:21,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:21,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 187 transitions, 2559 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-13 07:18:21,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:21,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:21,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:22,161 INFO L124 PetriNetUnfolderBase]: 1469/2602 cut-off events. [2024-10-13 07:18:22,162 INFO L125 PetriNetUnfolderBase]: For 19816/19816 co-relation queries the response was YES. [2024-10-13 07:18:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17119 conditions, 2602 events. 1469/2602 cut-off events. For 19816/19816 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14419 event pairs, 215 based on Foata normal form. 5/2607 useless extension candidates. Maximal degree in co-relation 17061. Up to 1572 conditions per place. [2024-10-13 07:18:22,189 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 213 selfloop transitions, 109 changer transitions 2/325 dead transitions. [2024-10-13 07:18:22,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 325 transitions, 4844 flow [2024-10-13 07:18:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:18:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:18:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-10-13 07:18:22,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-10-13 07:18:22,190 INFO L175 Difference]: Start difference. First operand has 122 places, 187 transitions, 2559 flow. Second operand 20 states and 170 transitions. [2024-10-13 07:18:22,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 325 transitions, 4844 flow [2024-10-13 07:18:22,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 325 transitions, 4504 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-10-13 07:18:22,254 INFO L231 Difference]: Finished difference. Result has 141 places, 261 transitions, 3831 flow [2024-10-13 07:18:22,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3831, PETRI_PLACES=141, PETRI_TRANSITIONS=261} [2024-10-13 07:18:22,254 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 120 predicate places. [2024-10-13 07:18:22,255 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 261 transitions, 3831 flow [2024-10-13 07:18:22,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 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) [2024-10-13 07:18:22,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:22,255 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:22,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 07:18:22,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:18:22,456 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:22,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:22,456 INFO L85 PathProgramCache]: Analyzing trace with hash -466669656, now seen corresponding path program 7 times [2024-10-13 07:18:22,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:22,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169848830] [2024-10-13 07:18:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:22,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:18:24,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169848830] [2024-10-13 07:18:24,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169848830] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:24,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589602920] [2024-10-13 07:18:24,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:18:24,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:24,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:24,385 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) [2024-10-13 07:18:24,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:18:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:24,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:18:24,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:24,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:18:24,577 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 47 treesize of output 45 [2024-10-13 07:18:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:18:24,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:24,762 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-10-13 07:18:24,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-10-13 07:18:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:18:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589602920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:24,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 19 [2024-10-13 07:18:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725148881] [2024-10-13 07:18:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:24,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:18:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:18:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:18:24,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:24,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 261 transitions, 3831 flow. Second operand has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:24,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:24,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:24,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:25,805 INFO L124 PetriNetUnfolderBase]: 1648/2922 cut-off events. [2024-10-13 07:18:25,806 INFO L125 PetriNetUnfolderBase]: For 25122/25122 co-relation queries the response was YES. [2024-10-13 07:18:25,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19927 conditions, 2922 events. 1648/2922 cut-off events. For 25122/25122 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16661 event pairs, 362 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 18996. Up to 2343 conditions per place. [2024-10-13 07:18:25,846 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 272 selfloop transitions, 92 changer transitions 1/366 dead transitions. [2024-10-13 07:18:25,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 366 transitions, 5661 flow [2024-10-13 07:18:25,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:18:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:18:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 163 transitions. [2024-10-13 07:18:25,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-10-13 07:18:25,848 INFO L175 Difference]: Start difference. First operand has 141 places, 261 transitions, 3831 flow. Second operand 18 states and 163 transitions. [2024-10-13 07:18:25,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 366 transitions, 5661 flow [2024-10-13 07:18:25,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 366 transitions, 5259 flow, removed 182 selfloop flow, removed 7 redundant places. [2024-10-13 07:18:25,914 INFO L231 Difference]: Finished difference. Result has 155 places, 304 transitions, 4369 flow [2024-10-13 07:18:25,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4369, PETRI_PLACES=155, PETRI_TRANSITIONS=304} [2024-10-13 07:18:25,915 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 134 predicate places. [2024-10-13 07:18:25,915 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 304 transitions, 4369 flow [2024-10-13 07:18:25,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.5) internal successors, (110), 20 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:25,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:25,915 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:25,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 07:18:26,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:18:26,116 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:26,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:26,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1733677407, now seen corresponding path program 8 times [2024-10-13 07:18:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144606797] [2024-10-13 07:18:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:26,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:26,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144606797] [2024-10-13 07:18:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144606797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:26,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532464871] [2024-10-13 07:18:26,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:18:26,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:26,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:26,299 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) [2024-10-13 07:18:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:18:26,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:18:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:26,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:18:26,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:26,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:26,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532464871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:26,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-13 07:18:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755882783] [2024-10-13 07:18:26,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:26,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:18:26,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:18:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:18:26,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:26,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 304 transitions, 4369 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:26,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:26,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:26,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:18:27,531 INFO L124 PetriNetUnfolderBase]: 1666/3049 cut-off events. [2024-10-13 07:18:27,531 INFO L125 PetriNetUnfolderBase]: For 28659/28659 co-relation queries the response was YES. [2024-10-13 07:18:27,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19949 conditions, 3049 events. 1666/3049 cut-off events. For 28659/28659 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18564 event pairs, 175 based on Foata normal form. 36/3085 useless extension candidates. Maximal degree in co-relation 18935. Up to 1050 conditions per place. [2024-10-13 07:18:27,558 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 348 selfloop transitions, 196 changer transitions 27/572 dead transitions. [2024-10-13 07:18:27,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 572 transitions, 9026 flow [2024-10-13 07:18:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 07:18:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-13 07:18:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-10-13 07:18:27,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-13 07:18:27,561 INFO L175 Difference]: Start difference. First operand has 155 places, 304 transitions, 4369 flow. Second operand 16 states and 132 transitions. [2024-10-13 07:18:27,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 572 transitions, 9026 flow [2024-10-13 07:18:27,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 572 transitions, 8611 flow, removed 196 selfloop flow, removed 4 redundant places. [2024-10-13 07:18:27,649 INFO L231 Difference]: Finished difference. Result has 170 places, 401 transitions, 5974 flow [2024-10-13 07:18:27,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5974, PETRI_PLACES=170, PETRI_TRANSITIONS=401} [2024-10-13 07:18:27,651 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2024-10-13 07:18:27,651 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 401 transitions, 5974 flow [2024-10-13 07:18:27,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:27,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:18:27,652 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:18:27,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 07:18:27,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 07:18:27,852 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:18:27,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:18:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -223713845, now seen corresponding path program 9 times [2024-10-13 07:18:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:18:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304212704] [2024-10-13 07:18:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:18:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:18:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:18:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:18:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304212704] [2024-10-13 07:18:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304212704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:18:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499072952] [2024-10-13 07:18:28,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:18:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:18:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:18:28,080 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) [2024-10-13 07:18:28,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:18:28,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:18:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:18:28,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 07:18:28,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:18:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:28,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:18:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:18:28,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499072952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:18:28,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:18:28,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-13 07:18:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391932513] [2024-10-13 07:18:28,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:18:28,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:18:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:18:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:18:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:18:28,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-13 07:18:28,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 401 transitions, 5974 flow. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:18:28,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:18:28,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-13 07:18:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand