./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:01:42,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:01:42,932 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:01:42,935 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:01:42,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:01:42,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:01:42,963 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:01:42,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:01:42,964 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:01:42,964 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:01:42,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:01:42,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:01:42,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:01:42,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:01:42,965 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:01:42,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:01:42,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:01:42,966 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:01:42,966 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:01:42,966 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:01:42,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:01:42,967 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:01:42,967 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:01:42,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:01:42,967 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:01:42,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:01:42,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:01:42,968 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:01:42,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:01:42,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:01:42,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:01:42,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:01:42,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:01:42,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:01:42,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:01:42,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:01:42,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:01:42,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:01:42,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-06-27 17:01:43,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:01:43,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:01:43,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:01:43,165 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:01:43,166 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:01:43,166 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2024-06-27 17:01:44,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:01:44,292 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:01:44,293 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2024-06-27 17:01:44,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9690049eb/67380c95defa4940935e83b29842fa98/FLAG71a824ad5 [2024-06-27 17:01:44,308 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9690049eb/67380c95defa4940935e83b29842fa98 [2024-06-27 17:01:44,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:01:44,311 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:01:44,311 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:01:44,311 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:01:44,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:01:44,318 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36af62c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44, skipping insertion in model container [2024-06-27 17:01:44,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:01:44,451 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-06-27 17:01:44,457 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:01:44,463 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:01:44,476 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-06-27 17:01:44,478 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:01:44,490 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:01:44,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44 WrapperNode [2024-06-27 17:01:44,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:01:44,491 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:01:44,491 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:01:44,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:01:44,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,510 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,531 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2024-06-27 17:01:44,532 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:01:44,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:01:44,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:01:44,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:01:44,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,551 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,571 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 17:01:44,572 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,581 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,595 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:01:44,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:01:44,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:01:44,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:01:44,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (1/1) ... [2024-06-27 17:01:44,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:01:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:44,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:01:44,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:01:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:01:44,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 17:01:44,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 17:01:44,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 17:01:44,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 17:01:44,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 17:01:44,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 17:01:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:01:44,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:01:44,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:01:44,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:01:44,661 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:01:44,757 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:01:44,759 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:01:44,984 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:01:44,985 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:01:45,141 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:01:45,141 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-27 17:01:45,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:01:45 BoogieIcfgContainer [2024-06-27 17:01:45,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:01:45,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:01:45,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:01:45,145 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:01:45,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:01:44" (1/3) ... [2024-06-27 17:01:45,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55deef13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:01:45, skipping insertion in model container [2024-06-27 17:01:45,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:01:44" (2/3) ... [2024-06-27 17:01:45,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55deef13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:01:45, skipping insertion in model container [2024-06-27 17:01:45,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:01:45" (3/3) ... [2024-06-27 17:01:45,150 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-06-27 17:01:45,156 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:01:45,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:01:45,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:01:45,163 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:01:45,195 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:01:45,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-06-27 17:01:45,241 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-06-27 17:01:45,241 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:01:45,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-06-27 17:01:45,243 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-06-27 17:01:45,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-06-27 17:01:45,253 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:01:45,258 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bdc219b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:01:45,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 17:01:45,265 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:01:45,266 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-06-27 17:01:45,266 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:01:45,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:45,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:45,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:45,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash 368648374, now seen corresponding path program 1 times [2024-06-27 17:01:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984672669] [2024-06-27 17:01:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984672669] [2024-06-27 17:01:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984672669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:01:45,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:01:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:01:45,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453413766] [2024-06-27 17:01:45,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:45,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:01:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:01:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:01:45,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:45,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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) [2024-06-27 17:01:45,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:45,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:45,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:46,063 INFO L124 PetriNetUnfolderBase]: 387/567 cut-off events. [2024-06-27 17:01:46,064 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-06-27 17:01:46,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 567 events. 387/567 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1792 event pairs, 124 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-06-27 17:01:46,071 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2024-06-27 17:01:46,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 191 flow [2024-06-27 17:01:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:01:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:01:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-06-27 17:01:46,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-06-27 17:01:46,082 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-06-27 17:01:46,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 191 flow [2024-06-27 17:01:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:01:46,089 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2024-06-27 17:01:46,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-06-27 17:01:46,093 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-06-27 17:01:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2024-06-27 17:01:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 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) [2024-06-27 17:01:46,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:46,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:01:46,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:46,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1718815074, now seen corresponding path program 1 times [2024-06-27 17:01:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235917448] [2024-06-27 17:01:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:46,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235917448] [2024-06-27 17:01:46,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235917448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:01:46,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:01:46,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:01:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888668176] [2024-06-27 17:01:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:46,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:01:46,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:46,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:01:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:01:46,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:46,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:46,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:46,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:46,421 INFO L124 PetriNetUnfolderBase]: 703/1050 cut-off events. [2024-06-27 17:01:46,421 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-06-27 17:01:46,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1050 events. 703/1050 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3873 event pairs, 401 based on Foata normal form. 46/1094 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2024-06-27 17:01:46,429 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 17:01:46,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 61 transitions, 298 flow [2024-06-27 17:01:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:01:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:01:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-27 17:01:46,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-06-27 17:01:46,431 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 5 states and 74 transitions. [2024-06-27 17:01:46,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 61 transitions, 298 flow [2024-06-27 17:01:46,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:01:46,435 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 112 flow [2024-06-27 17:01:46,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-06-27 17:01:46,437 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-06-27 17:01:46,437 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 112 flow [2024-06-27 17:01:46,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:46,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:46,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:01:46,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:46,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -546188461, now seen corresponding path program 1 times [2024-06-27 17:01:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:46,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229243781] [2024-06-27 17:01:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229243781] [2024-06-27 17:01:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229243781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:01:46,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:01:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:01:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433209262] [2024-06-27 17:01:46,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:46,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:01:46,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:01:46,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:01:46,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:46,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:46,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:46,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:46,680 INFO L124 PetriNetUnfolderBase]: 611/931 cut-off events. [2024-06-27 17:01:46,681 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-06-27 17:01:46,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 931 events. 611/931 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3434 event pairs, 372 based on Foata normal form. 41/971 useless extension candidates. Maximal degree in co-relation 1457. Up to 567 conditions per place. [2024-06-27 17:01:46,684 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-27 17:01:46,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 300 flow [2024-06-27 17:01:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:01:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:01:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-06-27 17:01:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-06-27 17:01:46,688 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 112 flow. Second operand 5 states and 71 transitions. [2024-06-27 17:01:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 300 flow [2024-06-27 17:01:46,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 17:01:46,690 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 135 flow [2024-06-27 17:01:46,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-06-27 17:01:46,692 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-06-27 17:01:46,692 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 135 flow [2024-06-27 17:01:46,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:46,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:46,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:01:46,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:46,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1422309272, now seen corresponding path program 1 times [2024-06-27 17:01:46,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:46,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223089926] [2024-06-27 17:01:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:46,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223089926] [2024-06-27 17:01:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223089926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:01:46,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:01:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:01:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454538319] [2024-06-27 17:01:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:01:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:01:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:01:46,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:46,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:46,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:46,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:46,875 INFO L124 PetriNetUnfolderBase]: 511/784 cut-off events. [2024-06-27 17:01:46,875 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-06-27 17:01:46,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 784 events. 511/784 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2728 event pairs, 333 based on Foata normal form. 22/805 useless extension candidates. Maximal degree in co-relation 1615. Up to 567 conditions per place. [2024-06-27 17:01:46,879 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 2 changer transitions 23/50 dead transitions. [2024-06-27 17:01:46,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 293 flow [2024-06-27 17:01:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:01:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:01:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-06-27 17:01:46,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-27 17:01:46,883 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 135 flow. Second operand 5 states and 67 transitions. [2024-06-27 17:01:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 293 flow [2024-06-27 17:01:46,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:01:46,887 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 108 flow [2024-06-27 17:01:46,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2024-06-27 17:01:46,888 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-06-27 17:01:46,889 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 108 flow [2024-06-27 17:01:46,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:46,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:01:46,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:46,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2051914133, now seen corresponding path program 1 times [2024-06-27 17:01:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876190085] [2024-06-27 17:01:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:46,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:46,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876190085] [2024-06-27 17:01:46,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876190085] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:46,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415852481] [2024-06-27 17:01:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:46,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:46,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:01:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:47,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:01:47,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:47,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415852481] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:47,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:01:47,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-06-27 17:01:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297662809] [2024-06-27 17:01:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:47,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:01:47,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:01:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:01:47,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:47,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:47,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:47,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:47,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:47,299 INFO L124 PetriNetUnfolderBase]: 517/764 cut-off events. [2024-06-27 17:01:47,299 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-06-27 17:01:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 764 events. 517/764 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2657 event pairs, 150 based on Foata normal form. 14/777 useless extension candidates. Maximal degree in co-relation 2321. Up to 379 conditions per place. [2024-06-27 17:01:47,303 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-27 17:01:47,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 390 flow [2024-06-27 17:01:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:01:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:01:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-27 17:01:47,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 17:01:47,304 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 108 flow. Second operand 7 states and 84 transitions. [2024-06-27 17:01:47,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 390 flow [2024-06-27 17:01:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 322 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 17:01:47,308 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 139 flow [2024-06-27 17:01:47,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-06-27 17:01:47,309 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-06-27 17:01:47,309 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 139 flow [2024-06-27 17:01:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:47,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:47,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:47,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:47,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:47,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:47,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1252915929, now seen corresponding path program 2 times [2024-06-27 17:01:47,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:47,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302910286] [2024-06-27 17:01:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302910286] [2024-06-27 17:01:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302910286] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849696120] [2024-06-27 17:01:47,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:01:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:47,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:47,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:47,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:01:47,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:01:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:47,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:01:47,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:47,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:47,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849696120] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:47,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:01:47,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-06-27 17:01:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182662430] [2024-06-27 17:01:47,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:47,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:01:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:01:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:01:47,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:47,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:47,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:47,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:47,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:47,898 INFO L124 PetriNetUnfolderBase]: 678/1005 cut-off events. [2024-06-27 17:01:47,898 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2024-06-27 17:01:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1005 events. 678/1005 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3648 event pairs, 240 based on Foata normal form. 12/1016 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-06-27 17:01:47,903 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-27 17:01:47,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 435 flow [2024-06-27 17:01:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:01:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:01:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-27 17:01:47,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 17:01:47,904 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 139 flow. Second operand 7 states and 80 transitions. [2024-06-27 17:01:47,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 435 flow [2024-06-27 17:01:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 400 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:01:47,907 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 196 flow [2024-06-27 17:01:47,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-06-27 17:01:47,908 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-06-27 17:01:47,908 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 196 flow [2024-06-27 17:01:47,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:47,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:47,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:47,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:01:48,119 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:48,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1113471579, now seen corresponding path program 3 times [2024-06-27 17:01:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782864856] [2024-06-27 17:01:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:48,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782864856] [2024-06-27 17:01:48,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782864856] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:48,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778227791] [2024-06-27 17:01:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:01:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:48,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:48,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:48,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 17:01:48,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:01:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:48,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:01:48,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778227791] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:48,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:01:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-06-27 17:01:48,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826280186] [2024-06-27 17:01:48,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:01:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:01:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:01:48,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:48,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:48,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:48,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:48,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:48,499 INFO L124 PetriNetUnfolderBase]: 784/1167 cut-off events. [2024-06-27 17:01:48,499 INFO L125 PetriNetUnfolderBase]: For 2006/2006 co-relation queries the response was YES. [2024-06-27 17:01:48,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1167 events. 784/1167 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4395 event pairs, 319 based on Foata normal form. 14/1180 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-06-27 17:01:48,505 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-27 17:01:48,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 519 flow [2024-06-27 17:01:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:01:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:01:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-27 17:01:48,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 17:01:48,507 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 196 flow. Second operand 7 states and 82 transitions. [2024-06-27 17:01:48,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 519 flow [2024-06-27 17:01:48,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 478 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 17:01:48,511 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 293 flow [2024-06-27 17:01:48,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-06-27 17:01:48,512 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-06-27 17:01:48,512 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 293 flow [2024-06-27 17:01:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:48,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:48,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:48,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:48,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:48,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:48,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1921426485, now seen corresponding path program 4 times [2024-06-27 17:01:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130543111] [2024-06-27 17:01:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:48,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:48,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130543111] [2024-06-27 17:01:48,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130543111] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:48,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919676398] [2024-06-27 17:01:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:01:48,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:48,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:48,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:48,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 17:01:48,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:01:48,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:48,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:01:48,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:48,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919676398] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:48,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:48,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-06-27 17:01:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505357525] [2024-06-27 17:01:48,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:48,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:01:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:01:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:01:48,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:48,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:48,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:48,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:48,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:49,329 INFO L124 PetriNetUnfolderBase]: 770/1153 cut-off events. [2024-06-27 17:01:49,329 INFO L125 PetriNetUnfolderBase]: For 3012/3012 co-relation queries the response was YES. [2024-06-27 17:01:49,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1153 events. 770/1153 cut-off events. For 3012/3012 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4521 event pairs, 143 based on Foata normal form. 14/1166 useless extension candidates. Maximal degree in co-relation 4412. Up to 385 conditions per place. [2024-06-27 17:01:49,336 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 92 selfloop transitions, 71 changer transitions 0/164 dead transitions. [2024-06-27 17:01:49,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 164 transitions, 1336 flow [2024-06-27 17:01:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:01:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:01:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 182 transitions. [2024-06-27 17:01:49,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448559670781895 [2024-06-27 17:01:49,337 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 293 flow. Second operand 18 states and 182 transitions. [2024-06-27 17:01:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 164 transitions, 1336 flow [2024-06-27 17:01:49,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 164 transitions, 1216 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 17:01:49,344 INFO L231 Difference]: Finished difference. Result has 63 places, 99 transitions, 830 flow [2024-06-27 17:01:49,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=830, PETRI_PLACES=63, PETRI_TRANSITIONS=99} [2024-06-27 17:01:49,345 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-06-27 17:01:49,345 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 99 transitions, 830 flow [2024-06-27 17:01:49,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:49,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:49,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:49,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:49,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:49,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:49,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash 910923729, now seen corresponding path program 5 times [2024-06-27 17:01:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:49,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628057924] [2024-06-27 17:01:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:49,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628057924] [2024-06-27 17:01:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628057924] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644923013] [2024-06-27 17:01:49,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:01:49,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:49,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:49,653 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:49,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 17:01:49,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:01:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:49,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:01:49,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:49,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:49,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644923013] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:49,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:49,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 17:01:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954475995] [2024-06-27 17:01:49,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:49,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:01:49,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:01:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:01:49,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 99 transitions, 830 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:50,168 INFO L124 PetriNetUnfolderBase]: 753/1118 cut-off events. [2024-06-27 17:01:50,168 INFO L125 PetriNetUnfolderBase]: For 3028/3028 co-relation queries the response was YES. [2024-06-27 17:01:50,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 1118 events. 753/1118 cut-off events. For 3028/3028 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4271 event pairs, 170 based on Foata normal form. 12/1130 useless extension candidates. Maximal degree in co-relation 4741. Up to 504 conditions per place. [2024-06-27 17:01:50,174 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 79 selfloop transitions, 75 changer transitions 0/155 dead transitions. [2024-06-27 17:01:50,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 155 transitions, 1379 flow [2024-06-27 17:01:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 17:01:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 17:01:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-06-27 17:01:50,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 17:01:50,176 INFO L175 Difference]: Start difference. First operand has 63 places, 99 transitions, 830 flow. Second operand 14 states and 143 transitions. [2024-06-27 17:01:50,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 155 transitions, 1379 flow [2024-06-27 17:01:50,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 155 transitions, 1244 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 17:01:50,187 INFO L231 Difference]: Finished difference. Result has 74 places, 117 transitions, 983 flow [2024-06-27 17:01:50,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=983, PETRI_PLACES=74, PETRI_TRANSITIONS=117} [2024-06-27 17:01:50,188 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-27 17:01:50,188 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 117 transitions, 983 flow [2024-06-27 17:01:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:50,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:50,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:50,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:50,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:50,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:50,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -193223073, now seen corresponding path program 6 times [2024-06-27 17:01:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:50,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137398428] [2024-06-27 17:01:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137398428] [2024-06-27 17:01:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137398428] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:50,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024866192] [2024-06-27 17:01:50,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:01:50,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:50,474 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:50,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 17:01:50,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:01:50,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:50,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:01:50,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:50,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:50,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024866192] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:50,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:01:50,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-06-27 17:01:50,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365656661] [2024-06-27 17:01:50,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:50,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:01:50,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:50,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:01:50,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:01:50,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:50,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 117 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:50,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:50,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:50,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:50,793 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2024-06-27 17:01:50,793 INFO L125 PetriNetUnfolderBase]: For 3363/3363 co-relation queries the response was YES. [2024-06-27 17:01:50,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1083 events. 736/1083 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4011 event pairs, 191 based on Foata normal form. 12/1095 useless extension candidates. Maximal degree in co-relation 4796. Up to 619 conditions per place. [2024-06-27 17:01:50,799 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 50 changer transitions 0/133 dead transitions. [2024-06-27 17:01:50,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 1283 flow [2024-06-27 17:01:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:01:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:01:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-27 17:01:50,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 17:01:50,801 INFO L175 Difference]: Start difference. First operand has 74 places, 117 transitions, 983 flow. Second operand 7 states and 81 transitions. [2024-06-27 17:01:50,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 1283 flow [2024-06-27 17:01:50,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 133 transitions, 1200 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 17:01:50,809 INFO L231 Difference]: Finished difference. Result has 72 places, 113 transitions, 964 flow [2024-06-27 17:01:50,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=72, PETRI_TRANSITIONS=113} [2024-06-27 17:01:50,810 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-06-27 17:01:50,810 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 113 transitions, 964 flow [2024-06-27 17:01:50,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:50,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:50,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:50,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:51,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:51,025 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:51,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -175012763, now seen corresponding path program 1 times [2024-06-27 17:01:51,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:51,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997966992] [2024-06-27 17:01:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:51,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:51,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997966992] [2024-06-27 17:01:51,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997966992] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:51,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503148763] [2024-06-27 17:01:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:51,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:51,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:51,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 17:01:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:51,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 17:01:51,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:51,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:51,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503148763] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:51,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 17:01:51,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-06-27 17:01:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184274545] [2024-06-27 17:01:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:01:51,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:01:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:01:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:01:51,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:51,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 113 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:51,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:51,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:51,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:51,288 INFO L124 PetriNetUnfolderBase]: 721/1053 cut-off events. [2024-06-27 17:01:51,288 INFO L125 PetriNetUnfolderBase]: For 3327/3327 co-relation queries the response was YES. [2024-06-27 17:01:51,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1053 events. 721/1053 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3815 event pairs, 200 based on Foata normal form. 70/1123 useless extension candidates. Maximal degree in co-relation 4539. Up to 816 conditions per place. [2024-06-27 17:01:51,294 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 122 selfloop transitions, 14 changer transitions 0/137 dead transitions. [2024-06-27 17:01:51,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1426 flow [2024-06-27 17:01:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:01:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:01:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-06-27 17:01:51,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-27 17:01:51,296 INFO L175 Difference]: Start difference. First operand has 72 places, 113 transitions, 964 flow. Second operand 5 states and 56 transitions. [2024-06-27 17:01:51,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1426 flow [2024-06-27 17:01:51,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1304 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:01:51,304 INFO L231 Difference]: Finished difference. Result has 71 places, 114 transitions, 922 flow [2024-06-27 17:01:51,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=71, PETRI_TRANSITIONS=114} [2024-06-27 17:01:51,305 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-27 17:01:51,305 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 114 transitions, 922 flow [2024-06-27 17:01:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:51,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:51,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:51,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:51,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:51,520 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:51,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1433195013, now seen corresponding path program 1 times [2024-06-27 17:01:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:51,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238621342] [2024-06-27 17:01:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238621342] [2024-06-27 17:01:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238621342] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128847786] [2024-06-27 17:01:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:51,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:51,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 17:01:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:51,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:01:51,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:51,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:01:52,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:01:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:52,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:52,457 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 38 treesize of output 34 [2024-06-27 17:01:52,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:01:52,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-06-27 17:01:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128847786] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:53,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:53,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-06-27 17:01:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704286096] [2024-06-27 17:01:53,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:53,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:01:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:01:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-06-27 17:01:53,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:53,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 114 transitions, 922 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:53,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:53,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:53,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:53,860 INFO L124 PetriNetUnfolderBase]: 1283/1869 cut-off events. [2024-06-27 17:01:53,860 INFO L125 PetriNetUnfolderBase]: For 5302/5302 co-relation queries the response was YES. [2024-06-27 17:01:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8612 conditions, 1869 events. 1283/1869 cut-off events. For 5302/5302 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7632 event pairs, 119 based on Foata normal form. 2/1871 useless extension candidates. Maximal degree in co-relation 7472. Up to 1149 conditions per place. [2024-06-27 17:01:53,870 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 229 selfloop transitions, 130 changer transitions 4/364 dead transitions. [2024-06-27 17:01:53,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 364 transitions, 3677 flow [2024-06-27 17:01:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:01:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:01:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 168 transitions. [2024-06-27 17:01:53,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 17:01:53,872 INFO L175 Difference]: Start difference. First operand has 71 places, 114 transitions, 922 flow. Second operand 12 states and 168 transitions. [2024-06-27 17:01:53,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 364 transitions, 3677 flow [2024-06-27 17:01:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 364 transitions, 3640 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 17:01:53,890 INFO L231 Difference]: Finished difference. Result has 86 places, 217 transitions, 2246 flow [2024-06-27 17:01:53,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2246, PETRI_PLACES=86, PETRI_TRANSITIONS=217} [2024-06-27 17:01:53,891 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-27 17:01:53,891 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 217 transitions, 2246 flow [2024-06-27 17:01:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:53,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:53,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:53,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:54,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 17:01:54,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:54,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:54,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1372818606, now seen corresponding path program 1 times [2024-06-27 17:01:54,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430023965] [2024-06-27 17:01:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:54,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:54,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430023965] [2024-06-27 17:01:54,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430023965] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:54,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147516785] [2024-06-27 17:01:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:54,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:54,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:54,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 17:01:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:54,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:01:54,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:54,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:01:54,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:01:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:54,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147516785] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:54,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:54,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-06-27 17:01:54,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100120483] [2024-06-27 17:01:54,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:54,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:01:54,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:01:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:01:54,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:54,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 217 transitions, 2246 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:54,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:54,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:54,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:55,152 INFO L124 PetriNetUnfolderBase]: 1740/2521 cut-off events. [2024-06-27 17:01:55,152 INFO L125 PetriNetUnfolderBase]: For 9284/9284 co-relation queries the response was YES. [2024-06-27 17:01:55,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13272 conditions, 2521 events. 1740/2521 cut-off events. For 9284/9284 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 10893 event pairs, 126 based on Foata normal form. 1/2522 useless extension candidates. Maximal degree in co-relation 12964. Up to 1492 conditions per place. [2024-06-27 17:01:55,168 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 205 selfloop transitions, 192 changer transitions 1/399 dead transitions. [2024-06-27 17:01:55,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 399 transitions, 4750 flow [2024-06-27 17:01:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:01:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:01:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-27 17:01:55,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-27 17:01:55,171 INFO L175 Difference]: Start difference. First operand has 86 places, 217 transitions, 2246 flow. Second operand 9 states and 123 transitions. [2024-06-27 17:01:55,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 399 transitions, 4750 flow [2024-06-27 17:01:55,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 399 transitions, 4543 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-27 17:01:55,204 INFO L231 Difference]: Finished difference. Result has 96 places, 297 transitions, 3541 flow [2024-06-27 17:01:55,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3541, PETRI_PLACES=96, PETRI_TRANSITIONS=297} [2024-06-27 17:01:55,205 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2024-06-27 17:01:55,205 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 297 transitions, 3541 flow [2024-06-27 17:01:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:55,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:55,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:55,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 17:01:55,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:55,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1084980243, now seen corresponding path program 2 times [2024-06-27 17:01:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:55,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30611333] [2024-06-27 17:01:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:55,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30611333] [2024-06-27 17:01:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30611333] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:55,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978465474] [2024-06-27 17:01:55,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:01:55,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:55,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:55,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 17:01:55,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:01:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:55,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:01:55,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:55,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:01:55,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:01:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:56,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:56,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978465474] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:56,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:56,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-06-27 17:01:56,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121927148] [2024-06-27 17:01:56,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:56,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 17:01:56,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 17:01:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-06-27 17:01:56,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:56,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 297 transitions, 3541 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:56,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:56,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:57,278 INFO L124 PetriNetUnfolderBase]: 1996/2891 cut-off events. [2024-06-27 17:01:57,279 INFO L125 PetriNetUnfolderBase]: For 13807/13807 co-relation queries the response was YES. [2024-06-27 17:01:57,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16998 conditions, 2891 events. 1996/2891 cut-off events. For 13807/13807 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12738 event pairs, 194 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 16699. Up to 2380 conditions per place. [2024-06-27 17:01:57,292 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 327 selfloop transitions, 165 changer transitions 2/495 dead transitions. [2024-06-27 17:01:57,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 495 transitions, 6299 flow [2024-06-27 17:01:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 17:01:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 17:01:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 263 transitions. [2024-06-27 17:01:57,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058641975308642 [2024-06-27 17:01:57,294 INFO L175 Difference]: Start difference. First operand has 96 places, 297 transitions, 3541 flow. Second operand 24 states and 263 transitions. [2024-06-27 17:01:57,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 495 transitions, 6299 flow [2024-06-27 17:01:57,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 495 transitions, 6178 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-27 17:01:57,339 INFO L231 Difference]: Finished difference. Result has 132 places, 397 transitions, 5253 flow [2024-06-27 17:01:57,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5253, PETRI_PLACES=132, PETRI_TRANSITIONS=397} [2024-06-27 17:01:57,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-27 17:01:57,340 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 397 transitions, 5253 flow [2024-06-27 17:01:57,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:57,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:57,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:57,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:57,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 17:01:57,554 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:57,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:57,554 INFO L85 PathProgramCache]: Analyzing trace with hash 488516362, now seen corresponding path program 2 times [2024-06-27 17:01:57,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:57,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567576230] [2024-06-27 17:01:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:57,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:57,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567576230] [2024-06-27 17:01:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567576230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:57,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860273017] [2024-06-27 17:01:57,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:01:57,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:57,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:57,863 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 17:01:57,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:01:57,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:57,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:01:57,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:58,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:01:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:58,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:58,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:01:58,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-06-27 17:01:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:58,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860273017] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:58,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:58,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-06-27 17:01:58,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84434438] [2024-06-27 17:01:58,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:58,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:01:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:01:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:01:58,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:58,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 397 transitions, 5253 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:58,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:58,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:58,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:58,818 INFO L124 PetriNetUnfolderBase]: 2205/3186 cut-off events. [2024-06-27 17:01:58,818 INFO L125 PetriNetUnfolderBase]: For 20108/20108 co-relation queries the response was YES. [2024-06-27 17:01:58,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20323 conditions, 3186 events. 2205/3186 cut-off events. For 20108/20108 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14281 event pairs, 223 based on Foata normal form. 1/3187 useless extension candidates. Maximal degree in co-relation 19982. Up to 2682 conditions per place. [2024-06-27 17:01:58,839 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 337 selfloop transitions, 140 changer transitions 1/479 dead transitions. [2024-06-27 17:01:58,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 479 transitions, 7078 flow [2024-06-27 17:01:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:01:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:01:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 17:01:58,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2024-06-27 17:01:58,841 INFO L175 Difference]: Start difference. First operand has 132 places, 397 transitions, 5253 flow. Second operand 9 states and 115 transitions. [2024-06-27 17:01:58,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 479 transitions, 7078 flow [2024-06-27 17:01:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 479 transitions, 6785 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-27 17:01:58,960 INFO L231 Difference]: Finished difference. Result has 137 places, 429 transitions, 5761 flow [2024-06-27 17:01:58,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5761, PETRI_PLACES=137, PETRI_TRANSITIONS=429} [2024-06-27 17:01:58,961 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2024-06-27 17:01:58,961 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 429 transitions, 5761 flow [2024-06-27 17:01:58,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:58,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:01:58,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 17:01:59,176 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:59,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 906925894, now seen corresponding path program 3 times [2024-06-27 17:01:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210129134] [2024-06-27 17:01:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:59,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:59,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210129134] [2024-06-27 17:01:59,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210129134] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:59,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085425472] [2024-06-27 17:01:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:01:59,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:59,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:59,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:59,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 17:01:59,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:01:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:59,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:01:59,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:59,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:01:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:59,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:59,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:01:59,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-06-27 17:01:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:01:59,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085425472] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:59,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-06-27 17:01:59,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888370720] [2024-06-27 17:01:59,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:59,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:01:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:01:59,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:01:59,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:01:59,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 429 transitions, 5761 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:59,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:59,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:01:59,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:00,478 INFO L124 PetriNetUnfolderBase]: 2506/3602 cut-off events. [2024-06-27 17:02:00,478 INFO L125 PetriNetUnfolderBase]: For 23170/23170 co-relation queries the response was YES. [2024-06-27 17:02:00,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23632 conditions, 3602 events. 2506/3602 cut-off events. For 23170/23170 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16372 event pairs, 287 based on Foata normal form. 1/3603 useless extension candidates. Maximal degree in co-relation 23305. Up to 2940 conditions per place. [2024-06-27 17:02:00,498 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 356 selfloop transitions, 189 changer transitions 1/547 dead transitions. [2024-06-27 17:02:00,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 547 transitions, 8137 flow [2024-06-27 17:02:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:02:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:02:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 17:02:00,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 17:02:00,500 INFO L175 Difference]: Start difference. First operand has 137 places, 429 transitions, 5761 flow. Second operand 9 states and 117 transitions. [2024-06-27 17:02:00,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 547 transitions, 8137 flow [2024-06-27 17:02:00,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 547 transitions, 7949 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:00,598 INFO L231 Difference]: Finished difference. Result has 143 places, 480 transitions, 6802 flow [2024-06-27 17:02:00,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6802, PETRI_PLACES=143, PETRI_TRANSITIONS=480} [2024-06-27 17:02:00,599 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-06-27 17:02:00,599 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 480 transitions, 6802 flow [2024-06-27 17:02:00,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:00,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:00,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:00,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:00,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 17:02:00,811 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:00,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:00,811 INFO L85 PathProgramCache]: Analyzing trace with hash -462631155, now seen corresponding path program 3 times [2024-06-27 17:02:00,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:00,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583386236] [2024-06-27 17:02:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:00,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:01,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583386236] [2024-06-27 17:02:01,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583386236] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:01,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22703112] [2024-06-27 17:02:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:01,138 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 17:02:01,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:02:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:01,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:02:01,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:01,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:02:01,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:01,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:01,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22703112] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:01,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:01,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-06-27 17:02:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878911686] [2024-06-27 17:02:01,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:01,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 17:02:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 17:02:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-06-27 17:02:01,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:01,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 480 transitions, 6802 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:01,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:01,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:01,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:02,803 INFO L124 PetriNetUnfolderBase]: 2673/3848 cut-off events. [2024-06-27 17:02:02,803 INFO L125 PetriNetUnfolderBase]: For 27498/27498 co-relation queries the response was YES. [2024-06-27 17:02:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26194 conditions, 3848 events. 2673/3848 cut-off events. For 27498/27498 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17836 event pairs, 295 based on Foata normal form. 1/3849 useless extension candidates. Maximal degree in co-relation 25861. Up to 3323 conditions per place. [2024-06-27 17:02:02,827 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 423 selfloop transitions, 169 changer transitions 1/594 dead transitions. [2024-06-27 17:02:02,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 594 transitions, 9024 flow [2024-06-27 17:02:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:02:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:02:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 247 transitions. [2024-06-27 17:02:02,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158249158249158 [2024-06-27 17:02:02,829 INFO L175 Difference]: Start difference. First operand has 143 places, 480 transitions, 6802 flow. Second operand 22 states and 247 transitions. [2024-06-27 17:02:02,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 594 transitions, 9024 flow [2024-06-27 17:02:02,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 594 transitions, 8643 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:02,994 INFO L231 Difference]: Finished difference. Result has 161 places, 509 transitions, 7172 flow [2024-06-27 17:02:02,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6443, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7172, PETRI_PLACES=161, PETRI_TRANSITIONS=509} [2024-06-27 17:02:02,995 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2024-06-27 17:02:02,995 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 509 transitions, 7172 flow [2024-06-27 17:02:02,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:02,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:02,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:03,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:03,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 17:02:03,204 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:03,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2090506375, now seen corresponding path program 4 times [2024-06-27 17:02:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:03,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867875601] [2024-06-27 17:02:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:03,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867875601] [2024-06-27 17:02:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867875601] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:03,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355183850] [2024-06-27 17:02:03,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:03,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:03,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:03,576 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:03,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:02:03,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:03,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 17:02:03,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:03,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:02:03,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:02:03,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-06-27 17:02:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:03,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355183850] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:04,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:04,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-06-27 17:02:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341575580] [2024-06-27 17:02:04,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:04,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 17:02:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 17:02:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-06-27 17:02:04,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:04,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 509 transitions, 7172 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:04,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:04,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:04,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:05,749 INFO L124 PetriNetUnfolderBase]: 3314/4752 cut-off events. [2024-06-27 17:02:05,749 INFO L125 PetriNetUnfolderBase]: For 35717/35717 co-relation queries the response was YES. [2024-06-27 17:02:05,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32444 conditions, 4752 events. 3314/4752 cut-off events. For 35717/35717 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22652 event pairs, 304 based on Foata normal form. 2/4754 useless extension candidates. Maximal degree in co-relation 32088. Up to 3563 conditions per place. [2024-06-27 17:02:05,782 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 427 selfloop transitions, 357 changer transitions 2/787 dead transitions. [2024-06-27 17:02:05,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 787 transitions, 11890 flow [2024-06-27 17:02:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:02:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:02:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 356 transitions. [2024-06-27 17:02:05,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995510662177329 [2024-06-27 17:02:05,785 INFO L175 Difference]: Start difference. First operand has 161 places, 509 transitions, 7172 flow. Second operand 33 states and 356 transitions. [2024-06-27 17:02:05,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 787 transitions, 11890 flow [2024-06-27 17:02:06,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 787 transitions, 11503 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 17:02:06,026 INFO L231 Difference]: Finished difference. Result has 197 places, 664 transitions, 10076 flow [2024-06-27 17:02:06,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6817, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10076, PETRI_PLACES=197, PETRI_TRANSITIONS=664} [2024-06-27 17:02:06,026 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2024-06-27 17:02:06,027 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 664 transitions, 10076 flow [2024-06-27 17:02:06,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:06,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:06,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:06,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:06,227 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:06,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1664739096, now seen corresponding path program 4 times [2024-06-27 17:02:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:06,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445261440] [2024-06-27 17:02:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:06,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445261440] [2024-06-27 17:02:06,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445261440] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:06,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839119832] [2024-06-27 17:02:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:06,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:02:06,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:06,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:06,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 17:02:06,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:06,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:06,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:06,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:02:06,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-06-27 17:02:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839119832] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:06,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-06-27 17:02:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646751239] [2024-06-27 17:02:06,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:06,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:06,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:06,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 664 transitions, 10076 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:06,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:06,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:06,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:07,811 INFO L124 PetriNetUnfolderBase]: 3519/5047 cut-off events. [2024-06-27 17:02:07,811 INFO L125 PetriNetUnfolderBase]: For 47919/47919 co-relation queries the response was YES. [2024-06-27 17:02:07,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37023 conditions, 5047 events. 3519/5047 cut-off events. For 47919/47919 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24342 event pairs, 316 based on Foata normal form. 1/5048 useless extension candidates. Maximal degree in co-relation 36632. Up to 4353 conditions per place. [2024-06-27 17:02:07,842 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 525 selfloop transitions, 187 changer transitions 1/714 dead transitions. [2024-06-27 17:02:07,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 714 transitions, 11976 flow [2024-06-27 17:02:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:02:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:02:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-27 17:02:07,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-06-27 17:02:07,844 INFO L175 Difference]: Start difference. First operand has 197 places, 664 transitions, 10076 flow. Second operand 9 states and 113 transitions. [2024-06-27 17:02:07,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 714 transitions, 11976 flow [2024-06-27 17:02:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 714 transitions, 11177 flow, removed 359 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:08,224 INFO L231 Difference]: Finished difference. Result has 201 places, 678 transitions, 9940 flow [2024-06-27 17:02:08,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9940, PETRI_PLACES=201, PETRI_TRANSITIONS=678} [2024-06-27 17:02:08,225 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-27 17:02:08,225 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 678 transitions, 9940 flow [2024-06-27 17:02:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:08,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:08,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:08,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:08,426 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:08,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -383857131, now seen corresponding path program 5 times [2024-06-27 17:02:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139460405] [2024-06-27 17:02:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:08,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:08,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139460405] [2024-06-27 17:02:08,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139460405] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:08,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912966770] [2024-06-27 17:02:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:08,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:08,803 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:08,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:02:08,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:08,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:02:08,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:08,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:02:09,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:09,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:09,354 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 38 treesize of output 34 [2024-06-27 17:02:09,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:02:09,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-06-27 17:02:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:09,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912966770] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:09,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:09,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-06-27 17:02:09,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110796943] [2024-06-27 17:02:09,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 17:02:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 17:02:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-06-27 17:02:09,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:09,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 678 transitions, 9940 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:09,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:09,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:09,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:11,339 INFO L124 PetriNetUnfolderBase]: 3841/5523 cut-off events. [2024-06-27 17:02:11,339 INFO L125 PetriNetUnfolderBase]: For 51604/51604 co-relation queries the response was YES. [2024-06-27 17:02:11,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39240 conditions, 5523 events. 3841/5523 cut-off events. For 51604/51604 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 27208 event pairs, 467 based on Foata normal form. 3/5526 useless extension candidates. Maximal degree in co-relation 38858. Up to 4616 conditions per place. [2024-06-27 17:02:11,375 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 579 selfloop transitions, 209 changer transitions 8/797 dead transitions. [2024-06-27 17:02:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 797 transitions, 12866 flow [2024-06-27 17:02:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 17:02:11,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 17:02:11,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 195 transitions. [2024-06-27 17:02:11,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 17:02:11,377 INFO L175 Difference]: Start difference. First operand has 201 places, 678 transitions, 9940 flow. Second operand 15 states and 195 transitions. [2024-06-27 17:02:11,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 797 transitions, 12866 flow [2024-06-27 17:02:11,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 797 transitions, 12531 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:11,672 INFO L231 Difference]: Finished difference. Result has 216 places, 720 transitions, 10684 flow [2024-06-27 17:02:11,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9615, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10684, PETRI_PLACES=216, PETRI_TRANSITIONS=720} [2024-06-27 17:02:11,673 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-06-27 17:02:11,673 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 720 transitions, 10684 flow [2024-06-27 17:02:11,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:11,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:11,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:11,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 17:02:11,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:11,875 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:11,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash -392338170, now seen corresponding path program 5 times [2024-06-27 17:02:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864831270] [2024-06-27 17:02:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864831270] [2024-06-27 17:02:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864831270] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452629256] [2024-06-27 17:02:12,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:12,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:12,134 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:12,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:02:12,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:12,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:12,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 17:02:12,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:12,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:12,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:12,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:02:12,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-06-27 17:02:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:12,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452629256] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:12,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:12,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-06-27 17:02:12,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218207880] [2024-06-27 17:02:12,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:12,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:12,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:12,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:12,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 720 transitions, 10684 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:12,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:12,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:12,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:13,587 INFO L124 PetriNetUnfolderBase]: 3932/5656 cut-off events. [2024-06-27 17:02:13,588 INFO L125 PetriNetUnfolderBase]: For 51870/51870 co-relation queries the response was YES. [2024-06-27 17:02:13,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40723 conditions, 5656 events. 3932/5656 cut-off events. For 51870/51870 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28008 event pairs, 475 based on Foata normal form. 1/5657 useless extension candidates. Maximal degree in co-relation 40332. Up to 5116 conditions per place. [2024-06-27 17:02:13,633 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 571 selfloop transitions, 187 changer transitions 1/760 dead transitions. [2024-06-27 17:02:13,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 760 transitions, 12527 flow [2024-06-27 17:02:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:02:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:02:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-27 17:02:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2024-06-27 17:02:13,636 INFO L175 Difference]: Start difference. First operand has 216 places, 720 transitions, 10684 flow. Second operand 9 states and 112 transitions. [2024-06-27 17:02:13,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 760 transitions, 12527 flow [2024-06-27 17:02:13,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 760 transitions, 12256 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 17:02:13,977 INFO L231 Difference]: Finished difference. Result has 222 places, 725 transitions, 10914 flow [2024-06-27 17:02:13,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10415, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10914, PETRI_PLACES=222, PETRI_TRANSITIONS=725} [2024-06-27 17:02:13,977 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 193 predicate places. [2024-06-27 17:02:13,978 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 725 transitions, 10914 flow [2024-06-27 17:02:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:13,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:13,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:13,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:14,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:14,182 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:14,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -438194637, now seen corresponding path program 6 times [2024-06-27 17:02:14,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94784877] [2024-06-27 17:02:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:14,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94784877] [2024-06-27 17:02:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94784877] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178433656] [2024-06-27 17:02:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:14,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:14,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:14,523 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:14,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:02:14,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:02:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:14,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:02:14,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:14,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:02:14,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:14,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:15,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178433656] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:15,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:15,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-06-27 17:02:15,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491715908] [2024-06-27 17:02:15,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:15,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 17:02:15,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 17:02:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-06-27 17:02:15,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:15,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 725 transitions, 10914 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:15,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:15,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:16,759 INFO L124 PetriNetUnfolderBase]: 4086/5880 cut-off events. [2024-06-27 17:02:16,759 INFO L125 PetriNetUnfolderBase]: For 56024/56024 co-relation queries the response was YES. [2024-06-27 17:02:16,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42541 conditions, 5880 events. 4086/5880 cut-off events. For 56024/56024 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29325 event pairs, 427 based on Foata normal form. 1/5881 useless extension candidates. Maximal degree in co-relation 42144. Up to 4985 conditions per place. [2024-06-27 17:02:16,811 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 572 selfloop transitions, 248 changer transitions 2/823 dead transitions. [2024-06-27 17:02:16,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 823 transitions, 13490 flow [2024-06-27 17:02:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 17:02:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 17:02:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 308 transitions. [2024-06-27 17:02:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933588761174968 [2024-06-27 17:02:16,813 INFO L175 Difference]: Start difference. First operand has 222 places, 725 transitions, 10914 flow. Second operand 29 states and 308 transitions. [2024-06-27 17:02:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 823 transitions, 13490 flow [2024-06-27 17:02:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 823 transitions, 13126 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:17,206 INFO L231 Difference]: Finished difference. Result has 247 places, 737 transitions, 11263 flow [2024-06-27 17:02:17,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11263, PETRI_PLACES=247, PETRI_TRANSITIONS=737} [2024-06-27 17:02:17,207 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-06-27 17:02:17,207 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 737 transitions, 11263 flow [2024-06-27 17:02:17,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:17,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:17,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:17,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-06-27 17:02:17,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:17,408 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:17,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash -360531284, now seen corresponding path program 6 times [2024-06-27 17:02:17,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360885500] [2024-06-27 17:02:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:17,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:17,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360885500] [2024-06-27 17:02:17,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360885500] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881056761] [2024-06-27 17:02:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:17,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:17,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:17,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:02:17,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:02:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:17,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-27 17:02:17,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:17,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-06-27 17:02:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:17,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:17,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:02:17,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-06-27 17:02:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:18,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881056761] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:18,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:18,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-06-27 17:02:18,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897342913] [2024-06-27 17:02:18,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:18,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:18,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 737 transitions, 11263 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:18,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:18,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:18,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:19,274 INFO L124 PetriNetUnfolderBase]: 4177/6013 cut-off events. [2024-06-27 17:02:19,274 INFO L125 PetriNetUnfolderBase]: For 59683/59683 co-relation queries the response was YES. [2024-06-27 17:02:19,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43769 conditions, 6013 events. 4177/6013 cut-off events. For 59683/59683 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 30082 event pairs, 549 based on Foata normal form. 1/6014 useless extension candidates. Maximal degree in co-relation 43368. Up to 5280 conditions per place. [2024-06-27 17:02:19,311 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 556 selfloop transitions, 247 changer transitions 1/805 dead transitions. [2024-06-27 17:02:19,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 805 transitions, 13589 flow [2024-06-27 17:02:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:02:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:02:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 17:02:19,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-27 17:02:19,312 INFO L175 Difference]: Start difference. First operand has 247 places, 737 transitions, 11263 flow. Second operand 9 states and 114 transitions. [2024-06-27 17:02:19,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 805 transitions, 13589 flow [2024-06-27 17:02:19,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 805 transitions, 13225 flow, removed 68 selfloop flow, removed 12 redundant places. [2024-06-27 17:02:19,632 INFO L231 Difference]: Finished difference. Result has 245 places, 753 transitions, 11826 flow [2024-06-27 17:02:19,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10901, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11826, PETRI_PLACES=245, PETRI_TRANSITIONS=753} [2024-06-27 17:02:19,633 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2024-06-27 17:02:19,633 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 753 transitions, 11826 flow [2024-06-27 17:02:19,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:19,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:19,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:19,840 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:19,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1311117892, now seen corresponding path program 7 times [2024-06-27 17:02:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:19,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083896059] [2024-06-27 17:02:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:19,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083896059] [2024-06-27 17:02:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083896059] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:19,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973039388] [2024-06-27 17:02:19,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:02:19,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:19,920 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:19,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:02:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:19,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:20,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:20,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973039388] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:20,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:20,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-06-27 17:02:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572153816] [2024-06-27 17:02:20,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:20,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:02:20,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:02:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:02:20,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:20,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 753 transitions, 11826 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:21,211 INFO L124 PetriNetUnfolderBase]: 4884/7037 cut-off events. [2024-06-27 17:02:21,211 INFO L125 PetriNetUnfolderBase]: For 90099/90099 co-relation queries the response was YES. [2024-06-27 17:02:21,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52087 conditions, 7037 events. 4884/7037 cut-off events. For 90099/90099 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 36276 event pairs, 1350 based on Foata normal form. 246/7283 useless extension candidates. Maximal degree in co-relation 51626. Up to 4760 conditions per place. [2024-06-27 17:02:21,270 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 794 selfloop transitions, 74 changer transitions 0/869 dead transitions. [2024-06-27 17:02:21,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 869 transitions, 14981 flow [2024-06-27 17:02:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:02:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:02:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 17:02:21,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-06-27 17:02:21,271 INFO L175 Difference]: Start difference. First operand has 245 places, 753 transitions, 11826 flow. Second operand 8 states and 101 transitions. [2024-06-27 17:02:21,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 869 transitions, 14981 flow [2024-06-27 17:02:21,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 869 transitions, 14287 flow, removed 152 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:21,791 INFO L231 Difference]: Finished difference. Result has 248 places, 726 transitions, 11101 flow [2024-06-27 17:02:21,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10514, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11101, PETRI_PLACES=248, PETRI_TRANSITIONS=726} [2024-06-27 17:02:21,792 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 219 predicate places. [2024-06-27 17:02:21,792 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 726 transitions, 11101 flow [2024-06-27 17:02:21,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:21,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:21,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:21,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:22,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 17:02:22,003 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:22,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash -626043135, now seen corresponding path program 8 times [2024-06-27 17:02:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:22,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792774899] [2024-06-27 17:02:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:22,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:22,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:22,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792774899] [2024-06-27 17:02:22,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792774899] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:22,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125451380] [2024-06-27 17:02:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:22,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:22,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:22,074 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:22,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:02:22,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:22,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:22,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:22,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:22,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:22,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125451380] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:22,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:22,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:02:22,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088312391] [2024-06-27 17:02:22,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:02:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:02:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:02:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:22,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 726 transitions, 11101 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:22,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:22,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:23,264 INFO L124 PetriNetUnfolderBase]: 4320/6388 cut-off events. [2024-06-27 17:02:23,264 INFO L125 PetriNetUnfolderBase]: For 84296/84296 co-relation queries the response was YES. [2024-06-27 17:02:23,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46972 conditions, 6388 events. 4320/6388 cut-off events. For 84296/84296 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34304 event pairs, 1091 based on Foata normal form. 386/6774 useless extension candidates. Maximal degree in co-relation 46554. Up to 2274 conditions per place. [2024-06-27 17:02:23,313 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 727 selfloop transitions, 73 changer transitions 0/801 dead transitions. [2024-06-27 17:02:23,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 801 transitions, 13463 flow [2024-06-27 17:02:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:02:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:02:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 17:02:23,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 17:02:23,314 INFO L175 Difference]: Start difference. First operand has 248 places, 726 transitions, 11101 flow. Second operand 7 states and 95 transitions. [2024-06-27 17:02:23,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 801 transitions, 13463 flow [2024-06-27 17:02:23,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 801 transitions, 13364 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 17:02:23,740 INFO L231 Difference]: Finished difference. Result has 250 places, 692 transitions, 10812 flow [2024-06-27 17:02:23,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10492, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10812, PETRI_PLACES=250, PETRI_TRANSITIONS=692} [2024-06-27 17:02:23,741 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2024-06-27 17:02:23,741 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 692 transitions, 10812 flow [2024-06-27 17:02:23,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:23,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:23,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:23,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:23,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 17:02:23,955 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:23,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1876018089, now seen corresponding path program 7 times [2024-06-27 17:02:23,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:23,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481696448] [2024-06-27 17:02:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481696448] [2024-06-27 17:02:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481696448] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237486763] [2024-06-27 17:02:24,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:02:24,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:24,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:24,016 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:24,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:02:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:24,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:24,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:24,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237486763] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:24,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-06-27 17:02:24,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342284633] [2024-06-27 17:02:24,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:24,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 17:02:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 17:02:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-06-27 17:02:24,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:24,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 692 transitions, 10812 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:24,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:24,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:24,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:25,179 INFO L124 PetriNetUnfolderBase]: 4005/5997 cut-off events. [2024-06-27 17:02:25,179 INFO L125 PetriNetUnfolderBase]: For 76409/76409 co-relation queries the response was YES. [2024-06-27 17:02:25,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45088 conditions, 5997 events. 4005/5997 cut-off events. For 76409/76409 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32677 event pairs, 1078 based on Foata normal form. 164/6161 useless extension candidates. Maximal degree in co-relation 44660. Up to 2271 conditions per place. [2024-06-27 17:02:25,231 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 590 selfloop transitions, 141 changer transitions 87/819 dead transitions. [2024-06-27 17:02:25,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 819 transitions, 13877 flow [2024-06-27 17:02:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:02:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:02:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-27 17:02:25,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-27 17:02:25,232 INFO L175 Difference]: Start difference. First operand has 250 places, 692 transitions, 10812 flow. Second operand 7 states and 94 transitions. [2024-06-27 17:02:25,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 819 transitions, 13877 flow [2024-06-27 17:02:25,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 819 transitions, 13572 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:25,727 INFO L231 Difference]: Finished difference. Result has 253 places, 628 transitions, 10121 flow [2024-06-27 17:02:25,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10521, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10121, PETRI_PLACES=253, PETRI_TRANSITIONS=628} [2024-06-27 17:02:25,728 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2024-06-27 17:02:25,728 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 628 transitions, 10121 flow [2024-06-27 17:02:25,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:25,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:25,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:25,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 17:02:25,931 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:25,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1364856676, now seen corresponding path program 1 times [2024-06-27 17:02:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:25,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860104073] [2024-06-27 17:02:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:25,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:25,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860104073] [2024-06-27 17:02:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860104073] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436185849] [2024-06-27 17:02:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:25,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:25,996 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:25,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:02:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:26,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:26,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:26,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436185849] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:26,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:26,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-06-27 17:02:26,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027118234] [2024-06-27 17:02:26,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:26,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:02:26,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:02:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:02:26,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:26,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 628 transitions, 10121 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:26,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:26,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:26,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:27,129 INFO L124 PetriNetUnfolderBase]: 3895/5867 cut-off events. [2024-06-27 17:02:27,129 INFO L125 PetriNetUnfolderBase]: For 82234/82234 co-relation queries the response was YES. [2024-06-27 17:02:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44858 conditions, 5867 events. 3895/5867 cut-off events. For 82234/82234 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 32363 event pairs, 952 based on Foata normal form. 82/5949 useless extension candidates. Maximal degree in co-relation 44773. Up to 2271 conditions per place. [2024-06-27 17:02:27,174 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 593 selfloop transitions, 132 changer transitions 43/769 dead transitions. [2024-06-27 17:02:27,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 769 transitions, 13094 flow [2024-06-27 17:02:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:02:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:02:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-27 17:02:27,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-27 17:02:27,175 INFO L175 Difference]: Start difference. First operand has 253 places, 628 transitions, 10121 flow. Second operand 10 states and 134 transitions. [2024-06-27 17:02:27,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 769 transitions, 13094 flow [2024-06-27 17:02:27,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 769 transitions, 13017 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 17:02:27,629 INFO L231 Difference]: Finished difference. Result has 257 places, 618 transitions, 10264 flow [2024-06-27 17:02:27,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10046, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10264, PETRI_PLACES=257, PETRI_TRANSITIONS=618} [2024-06-27 17:02:27,630 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-06-27 17:02:27,630 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 618 transitions, 10264 flow [2024-06-27 17:02:27,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:27,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:27,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:27,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-06-27 17:02:27,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:27,831 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:27,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1947705552, now seen corresponding path program 2 times [2024-06-27 17:02:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:27,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346627018] [2024-06-27 17:02:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:27,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346627018] [2024-06-27 17:02:27,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346627018] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:27,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237336408] [2024-06-27 17:02:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:27,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:27,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:27,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:27,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 17:02:27,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:27,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:27,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:27,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:28,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237336408] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:28,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:28,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-06-27 17:02:28,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740101932] [2024-06-27 17:02:28,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:28,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:28,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:28,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 618 transitions, 10264 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:28,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:29,110 INFO L124 PetriNetUnfolderBase]: 4046/6016 cut-off events. [2024-06-27 17:02:29,110 INFO L125 PetriNetUnfolderBase]: For 97318/97318 co-relation queries the response was YES. [2024-06-27 17:02:29,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48100 conditions, 6016 events. 4046/6016 cut-off events. For 97318/97318 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32590 event pairs, 980 based on Foata normal form. 170/6186 useless extension candidates. Maximal degree in co-relation 48012. Up to 2271 conditions per place. [2024-06-27 17:02:29,159 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 622 selfloop transitions, 178 changer transitions 21/822 dead transitions. [2024-06-27 17:02:29,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 822 transitions, 14262 flow [2024-06-27 17:02:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:02:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:02:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-06-27 17:02:29,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45584045584045585 [2024-06-27 17:02:29,161 INFO L175 Difference]: Start difference. First operand has 257 places, 618 transitions, 10264 flow. Second operand 13 states and 160 transitions. [2024-06-27 17:02:29,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 822 transitions, 14262 flow [2024-06-27 17:02:29,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 822 transitions, 13618 flow, removed 140 selfloop flow, removed 10 redundant places. [2024-06-27 17:02:29,712 INFO L231 Difference]: Finished difference. Result has 260 places, 643 transitions, 10619 flow [2024-06-27 17:02:29,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9832, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10619, PETRI_PLACES=260, PETRI_TRANSITIONS=643} [2024-06-27 17:02:29,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2024-06-27 17:02:29,713 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 643 transitions, 10619 flow [2024-06-27 17:02:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:29,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:29,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:29,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-06-27 17:02:29,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 17:02:29,917 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:29,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:29,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1053752070, now seen corresponding path program 3 times [2024-06-27 17:02:29,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:29,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495467703] [2024-06-27 17:02:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:29,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:29,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:29,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495467703] [2024-06-27 17:02:29,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495467703] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:29,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897972659] [2024-06-27 17:02:29,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:29,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:29,980 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:29,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 17:02:30,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:02:30,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:30,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:30,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:30,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:30,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897972659] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:30,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:30,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-06-27 17:02:30,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118218613] [2024-06-27 17:02:30,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:30,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:02:30,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:02:30,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:02:30,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:30,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 643 transitions, 10619 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:30,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:30,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:30,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:31,167 INFO L124 PetriNetUnfolderBase]: 3928/5901 cut-off events. [2024-06-27 17:02:31,167 INFO L125 PetriNetUnfolderBase]: For 88406/88406 co-relation queries the response was YES. [2024-06-27 17:02:31,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47286 conditions, 5901 events. 3928/5901 cut-off events. For 88406/88406 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32509 event pairs, 983 based on Foata normal form. 82/5983 useless extension candidates. Maximal degree in co-relation 47199. Up to 2271 conditions per place. [2024-06-27 17:02:31,217 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 613 selfloop transitions, 126 changer transitions 38/778 dead transitions. [2024-06-27 17:02:31,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 778 transitions, 13579 flow [2024-06-27 17:02:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:02:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:02:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-27 17:02:31,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-27 17:02:31,219 INFO L175 Difference]: Start difference. First operand has 260 places, 643 transitions, 10619 flow. Second operand 10 states and 126 transitions. [2024-06-27 17:02:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 778 transitions, 13579 flow [2024-06-27 17:02:31,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 778 transitions, 13257 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 17:02:31,746 INFO L231 Difference]: Finished difference. Result has 261 places, 607 transitions, 9961 flow [2024-06-27 17:02:31,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10036, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9961, PETRI_PLACES=261, PETRI_TRANSITIONS=607} [2024-06-27 17:02:31,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 232 predicate places. [2024-06-27 17:02:31,747 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 607 transitions, 9961 flow [2024-06-27 17:02:31,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:31,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:31,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:31,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-06-27 17:02:31,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 17:02:31,958 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:31,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 447065094, now seen corresponding path program 4 times [2024-06-27 17:02:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649740777] [2024-06-27 17:02:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:31,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:32,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:32,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649740777] [2024-06-27 17:02:32,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649740777] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:32,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059155186] [2024-06-27 17:02:32,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:32,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:32,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:32,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:32,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 17:02:32,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:32,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:32,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 17:02:32,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:32,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:32,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059155186] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:32,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:32,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2024-06-27 17:02:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913811156] [2024-06-27 17:02:32,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 17:02:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 17:02:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-06-27 17:02:32,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:32,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 607 transitions, 9961 flow. Second operand has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:32,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:32,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:32,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:33,775 INFO L124 PetriNetUnfolderBase]: 4564/6771 cut-off events. [2024-06-27 17:02:33,775 INFO L125 PetriNetUnfolderBase]: For 106952/106952 co-relation queries the response was YES. [2024-06-27 17:02:33,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54005 conditions, 6771 events. 4564/6771 cut-off events. For 106952/106952 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37395 event pairs, 280 based on Foata normal form. 178/6949 useless extension candidates. Maximal degree in co-relation 53918. Up to 1710 conditions per place. [2024-06-27 17:02:33,835 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 587 selfloop transitions, 394 changer transitions 36/1018 dead transitions. [2024-06-27 17:02:33,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1018 transitions, 17236 flow [2024-06-27 17:02:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-06-27 17:02:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-06-27 17:02:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 433 transitions. [2024-06-27 17:02:33,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009259259259259 [2024-06-27 17:02:33,836 INFO L175 Difference]: Start difference. First operand has 261 places, 607 transitions, 9961 flow. Second operand 40 states and 433 transitions. [2024-06-27 17:02:33,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1018 transitions, 17236 flow [2024-06-27 17:02:34,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1018 transitions, 16608 flow, removed 100 selfloop flow, removed 9 redundant places. [2024-06-27 17:02:34,654 INFO L231 Difference]: Finished difference. Result has 306 places, 739 transitions, 12829 flow [2024-06-27 17:02:34,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9611, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12829, PETRI_PLACES=306, PETRI_TRANSITIONS=739} [2024-06-27 17:02:34,655 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 277 predicate places. [2024-06-27 17:02:34,655 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 739 transitions, 12829 flow [2024-06-27 17:02:34,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.6875) internal successors, (107), 16 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:34,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:34,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:34,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:34,867 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:34,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2119811638, now seen corresponding path program 5 times [2024-06-27 17:02:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222847045] [2024-06-27 17:02:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222847045] [2024-06-27 17:02:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222847045] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676019037] [2024-06-27 17:02:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:34,932 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:34,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 17:02:34,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:34,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:34,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:35,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:35,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676019037] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:35,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:35,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-06-27 17:02:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530599342] [2024-06-27 17:02:35,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 17:02:35,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 17:02:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-06-27 17:02:35,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:35,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 739 transitions, 12829 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:35,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:35,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:35,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:36,425 INFO L124 PetriNetUnfolderBase]: 4266/6385 cut-off events. [2024-06-27 17:02:36,425 INFO L125 PetriNetUnfolderBase]: For 118212/118212 co-relation queries the response was YES. [2024-06-27 17:02:36,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54573 conditions, 6385 events. 4266/6385 cut-off events. For 118212/118212 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 35390 event pairs, 907 based on Foata normal form. 125/6510 useless extension candidates. Maximal degree in co-relation 54470. Up to 2609 conditions per place. [2024-06-27 17:02:36,484 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 685 selfloop transitions, 125 changer transitions 40/851 dead transitions. [2024-06-27 17:02:36,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 851 transitions, 16028 flow [2024-06-27 17:02:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:02:36,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:02:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-27 17:02:36,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-06-27 17:02:36,485 INFO L175 Difference]: Start difference. First operand has 306 places, 739 transitions, 12829 flow. Second operand 9 states and 113 transitions. [2024-06-27 17:02:36,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 851 transitions, 16028 flow [2024-06-27 17:02:37,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 851 transitions, 15056 flow, removed 279 selfloop flow, removed 9 redundant places. [2024-06-27 17:02:37,470 INFO L231 Difference]: Finished difference. Result has 308 places, 740 transitions, 12478 flow [2024-06-27 17:02:37,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11752, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12478, PETRI_PLACES=308, PETRI_TRANSITIONS=740} [2024-06-27 17:02:37,471 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 279 predicate places. [2024-06-27 17:02:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 740 transitions, 12478 flow [2024-06-27 17:02:37,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:37,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:37,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:37,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:37,685 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -903780682, now seen corresponding path program 6 times [2024-06-27 17:02:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204218388] [2024-06-27 17:02:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:37,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:37,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204218388] [2024-06-27 17:02:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204218388] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:37,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822499894] [2024-06-27 17:02:37,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:37,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:37,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 17:02:37,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:02:37,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:37,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:37,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:37,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822499894] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:37,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-06-27 17:02:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602158733] [2024-06-27 17:02:37,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:37,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:37,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 740 transitions, 12478 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:37,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:37,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:37,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:39,096 INFO L124 PetriNetUnfolderBase]: 4044/6152 cut-off events. [2024-06-27 17:02:39,096 INFO L125 PetriNetUnfolderBase]: For 103689/103689 co-relation queries the response was YES. [2024-06-27 17:02:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49665 conditions, 6152 events. 4044/6152 cut-off events. For 103689/103689 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 34731 event pairs, 811 based on Foata normal form. 178/6330 useless extension candidates. Maximal degree in co-relation 49560. Up to 2609 conditions per place. [2024-06-27 17:02:39,147 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 641 selfloop transitions, 124 changer transitions 28/794 dead transitions. [2024-06-27 17:02:39,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 794 transitions, 13841 flow [2024-06-27 17:02:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:02:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:02:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 17:02:39,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-27 17:02:39,148 INFO L175 Difference]: Start difference. First operand has 308 places, 740 transitions, 12478 flow. Second operand 10 states and 123 transitions. [2024-06-27 17:02:39,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 794 transitions, 13841 flow [2024-06-27 17:02:39,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 794 transitions, 13486 flow, removed 61 selfloop flow, removed 13 redundant places. [2024-06-27 17:02:39,797 INFO L231 Difference]: Finished difference. Result has 302 places, 677 transitions, 11108 flow [2024-06-27 17:02:39,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10501, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11108, PETRI_PLACES=302, PETRI_TRANSITIONS=677} [2024-06-27 17:02:39,798 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 273 predicate places. [2024-06-27 17:02:39,798 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 677 transitions, 11108 flow [2024-06-27 17:02:39,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:39,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:39,798 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:39,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-06-27 17:02:40,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:40,000 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:40,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:40,000 INFO L85 PathProgramCache]: Analyzing trace with hash 547028141, now seen corresponding path program 9 times [2024-06-27 17:02:40,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:40,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921586495] [2024-06-27 17:02:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:40,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:40,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921586495] [2024-06-27 17:02:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921586495] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:40,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564806027] [2024-06-27 17:02:40,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:40,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:40,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:40,056 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:40,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-27 17:02:40,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:02:40,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:40,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 17:02:40,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:40,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:40,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564806027] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:40,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-06-27 17:02:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609302097] [2024-06-27 17:02:40,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:40,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-27 17:02:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:40,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-27 17:02:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-06-27 17:02:40,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:40,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 677 transitions, 11108 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:40,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:40,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:40,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:40,924 INFO L124 PetriNetUnfolderBase]: 2572/3926 cut-off events. [2024-06-27 17:02:40,924 INFO L125 PetriNetUnfolderBase]: For 57079/57079 co-relation queries the response was YES. [2024-06-27 17:02:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32650 conditions, 3926 events. 2572/3926 cut-off events. For 57079/57079 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20462 event pairs, 701 based on Foata normal form. 202/4128 useless extension candidates. Maximal degree in co-relation 32549. Up to 2609 conditions per place. [2024-06-27 17:02:40,961 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 358 selfloop transitions, 3 changer transitions 240/602 dead transitions. [2024-06-27 17:02:40,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 602 transitions, 11105 flow [2024-06-27 17:02:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:02:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:02:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 17:02:40,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 17:02:40,963 INFO L175 Difference]: Start difference. First operand has 302 places, 677 transitions, 11108 flow. Second operand 7 states and 87 transitions. [2024-06-27 17:02:40,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 602 transitions, 11105 flow [2024-06-27 17:02:41,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 602 transitions, 10668 flow, removed 60 selfloop flow, removed 28 redundant places. [2024-06-27 17:02:41,292 INFO L231 Difference]: Finished difference. Result has 265 places, 362 transitions, 5491 flow [2024-06-27 17:02:41,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9426, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5491, PETRI_PLACES=265, PETRI_TRANSITIONS=362} [2024-06-27 17:02:41,292 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 236 predicate places. [2024-06-27 17:02:41,292 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 362 transitions, 5491 flow [2024-06-27 17:02:41,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:41,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:41,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:41,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:41,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:41,493 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:41,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1419626082, now seen corresponding path program 10 times [2024-06-27 17:02:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:41,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099243349] [2024-06-27 17:02:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:02:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099243349] [2024-06-27 17:02:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099243349] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142253868] [2024-06-27 17:02:41,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:41,575 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:41,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-27 17:02:41,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:41,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:41,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:41,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142253868] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:41,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-06-27 17:02:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538054706] [2024-06-27 17:02:41,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:41,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:41,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 362 transitions, 5491 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:41,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:41,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:41,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:42,562 INFO L124 PetriNetUnfolderBase]: 1843/2632 cut-off events. [2024-06-27 17:02:42,562 INFO L125 PetriNetUnfolderBase]: For 36291/36291 co-relation queries the response was YES. [2024-06-27 17:02:42,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21307 conditions, 2632 events. 1843/2632 cut-off events. For 36291/36291 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11238 event pairs, 152 based on Foata normal form. 28/2660 useless extension candidates. Maximal degree in co-relation 21225. Up to 933 conditions per place. [2024-06-27 17:02:42,584 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 263 selfloop transitions, 207 changer transitions 0/471 dead transitions. [2024-06-27 17:02:42,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 471 transitions, 7618 flow [2024-06-27 17:02:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:02:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:02:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2024-06-27 17:02:42,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2024-06-27 17:02:42,585 INFO L175 Difference]: Start difference. First operand has 265 places, 362 transitions, 5491 flow. Second operand 20 states and 209 transitions. [2024-06-27 17:02:42,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 471 transitions, 7618 flow [2024-06-27 17:02:42,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 471 transitions, 7180 flow, removed 175 selfloop flow, removed 21 redundant places. [2024-06-27 17:02:42,768 INFO L231 Difference]: Finished difference. Result has 191 places, 379 transitions, 5887 flow [2024-06-27 17:02:42,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5887, PETRI_PLACES=191, PETRI_TRANSITIONS=379} [2024-06-27 17:02:42,769 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2024-06-27 17:02:42,769 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 379 transitions, 5887 flow [2024-06-27 17:02:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:42,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:42,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:42,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-06-27 17:02:42,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 17:02:42,969 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:42,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1913163063, now seen corresponding path program 8 times [2024-06-27 17:02:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:42,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466311230] [2024-06-27 17:02:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:43,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466311230] [2024-06-27 17:02:43,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466311230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:43,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491416369] [2024-06-27 17:02:43,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:43,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:43,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:43,036 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:43,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-27 17:02:43,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:43,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:43,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:43,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491416369] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:43,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:43,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-06-27 17:02:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850387611] [2024-06-27 17:02:43,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:43,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:43,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 379 transitions, 5887 flow. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:43,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:43,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:43,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:43,725 INFO L124 PetriNetUnfolderBase]: 2128/3056 cut-off events. [2024-06-27 17:02:43,725 INFO L125 PetriNetUnfolderBase]: For 42949/42949 co-relation queries the response was YES. [2024-06-27 17:02:43,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24229 conditions, 3056 events. 2128/3056 cut-off events. For 42949/42949 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13670 event pairs, 206 based on Foata normal form. 30/3086 useless extension candidates. Maximal degree in co-relation 24161. Up to 1001 conditions per place. [2024-06-27 17:02:43,747 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 386 selfloop transitions, 153 changer transitions 0/540 dead transitions. [2024-06-27 17:02:43,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 540 transitions, 9043 flow [2024-06-27 17:02:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:02:43,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:02:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-27 17:02:43,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-27 17:02:43,748 INFO L175 Difference]: Start difference. First operand has 191 places, 379 transitions, 5887 flow. Second operand 10 states and 109 transitions. [2024-06-27 17:02:43,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 540 transitions, 9043 flow [2024-06-27 17:02:43,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 540 transitions, 8627 flow, removed 105 selfloop flow, removed 9 redundant places. [2024-06-27 17:02:43,894 INFO L231 Difference]: Finished difference. Result has 194 places, 399 transitions, 6337 flow [2024-06-27 17:02:43,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5527, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6337, PETRI_PLACES=194, PETRI_TRANSITIONS=399} [2024-06-27 17:02:43,894 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-27 17:02:43,894 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 399 transitions, 6337 flow [2024-06-27 17:02:43,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:43,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:43,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:43,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-27 17:02:44,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:44,104 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:44,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 874268629, now seen corresponding path program 9 times [2024-06-27 17:02:44,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:44,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967403502] [2024-06-27 17:02:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:44,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967403502] [2024-06-27 17:02:44,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967403502] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:44,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021547674] [2024-06-27 17:02:44,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:44,180 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:44,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-27 17:02:44,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:02:44,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:44,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:44,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:44,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021547674] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:44,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-06-27 17:02:44,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181876864] [2024-06-27 17:02:44,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:44,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:02:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:02:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:02:44,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:44,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 399 transitions, 6337 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:44,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:44,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:44,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:45,060 INFO L124 PetriNetUnfolderBase]: 2506/3612 cut-off events. [2024-06-27 17:02:45,060 INFO L125 PetriNetUnfolderBase]: For 52078/52078 co-relation queries the response was YES. [2024-06-27 17:02:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28870 conditions, 3612 events. 2506/3612 cut-off events. For 52078/52078 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 16753 event pairs, 401 based on Foata normal form. 42/3654 useless extension candidates. Maximal degree in co-relation 28801. Up to 2039 conditions per place. [2024-06-27 17:02:45,088 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 442 selfloop transitions, 244 changer transitions 0/687 dead transitions. [2024-06-27 17:02:45,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 687 transitions, 11464 flow [2024-06-27 17:02:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:02:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:02:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 175 transitions. [2024-06-27 17:02:45,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050925925925926 [2024-06-27 17:02:45,089 INFO L175 Difference]: Start difference. First operand has 194 places, 399 transitions, 6337 flow. Second operand 16 states and 175 transitions. [2024-06-27 17:02:45,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 687 transitions, 11464 flow [2024-06-27 17:02:45,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 687 transitions, 11116 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-27 17:02:45,312 INFO L231 Difference]: Finished difference. Result has 207 places, 488 transitions, 8079 flow [2024-06-27 17:02:45,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8079, PETRI_PLACES=207, PETRI_TRANSITIONS=488} [2024-06-27 17:02:45,313 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-27 17:02:45,313 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 488 transitions, 8079 flow [2024-06-27 17:02:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:45,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:45,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:45,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:45,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:45,525 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:45,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash -994899019, now seen corresponding path program 10 times [2024-06-27 17:02:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686798287] [2024-06-27 17:02:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:45,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:45,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686798287] [2024-06-27 17:02:45,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686798287] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455886460] [2024-06-27 17:02:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:02:45,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:45,608 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:45,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-27 17:02:45,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:02:45,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:45,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:45,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:45,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455886460] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:45,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:45,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-06-27 17:02:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664565440] [2024-06-27 17:02:45,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:45,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:45,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 488 transitions, 8079 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:45,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:45,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:45,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:47,069 INFO L124 PetriNetUnfolderBase]: 2694/3923 cut-off events. [2024-06-27 17:02:47,070 INFO L125 PetriNetUnfolderBase]: For 62666/62666 co-relation queries the response was YES. [2024-06-27 17:02:47,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33025 conditions, 3923 events. 2694/3923 cut-off events. For 62666/62666 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18660 event pairs, 163 based on Foata normal form. 42/3965 useless extension candidates. Maximal degree in co-relation 32952. Up to 1232 conditions per place. [2024-06-27 17:02:47,101 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 377 selfloop transitions, 478 changer transitions 0/856 dead transitions. [2024-06-27 17:02:47,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 856 transitions, 14301 flow [2024-06-27 17:02:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-06-27 17:02:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-06-27 17:02:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 426 transitions. [2024-06-27 17:02:47,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35858585858585856 [2024-06-27 17:02:47,102 INFO L175 Difference]: Start difference. First operand has 207 places, 488 transitions, 8079 flow. Second operand 44 states and 426 transitions. [2024-06-27 17:02:47,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 856 transitions, 14301 flow [2024-06-27 17:02:47,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 856 transitions, 13538 flow, removed 195 selfloop flow, removed 8 redundant places. [2024-06-27 17:02:47,404 INFO L231 Difference]: Finished difference. Result has 248 places, 668 transitions, 11311 flow [2024-06-27 17:02:47,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11311, PETRI_PLACES=248, PETRI_TRANSITIONS=668} [2024-06-27 17:02:47,405 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 219 predicate places. [2024-06-27 17:02:47,405 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 668 transitions, 11311 flow [2024-06-27 17:02:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:47,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:47,405 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:47,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-06-27 17:02:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-27 17:02:47,606 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:47,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1750131157, now seen corresponding path program 11 times [2024-06-27 17:02:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571981706] [2024-06-27 17:02:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:47,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:47,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571981706] [2024-06-27 17:02:47,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571981706] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:47,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80249612] [2024-06-27 17:02:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:47,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:47,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:47,684 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:47,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-27 17:02:47,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:47,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:47,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:47,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:47,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:47,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80249612] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:47,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:47,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-06-27 17:02:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314917073] [2024-06-27 17:02:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 17:02:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 17:02:47,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-06-27 17:02:47,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:47,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 668 transitions, 11311 flow. Second operand has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:47,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:47,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:47,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:48,945 INFO L124 PetriNetUnfolderBase]: 2657/3861 cut-off events. [2024-06-27 17:02:48,945 INFO L125 PetriNetUnfolderBase]: For 59773/59773 co-relation queries the response was YES. [2024-06-27 17:02:48,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33049 conditions, 3861 events. 2657/3861 cut-off events. For 59773/59773 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 18278 event pairs, 167 based on Foata normal form. 54/3915 useless extension candidates. Maximal degree in co-relation 32970. Up to 1196 conditions per place. [2024-06-27 17:02:48,977 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 370 selfloop transitions, 497 changer transitions 0/868 dead transitions. [2024-06-27 17:02:48,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 868 transitions, 15142 flow [2024-06-27 17:02:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:02:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:02:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 357 transitions. [2024-06-27 17:02:48,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-27 17:02:48,980 INFO L175 Difference]: Start difference. First operand has 248 places, 668 transitions, 11311 flow. Second operand 35 states and 357 transitions. [2024-06-27 17:02:48,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 868 transitions, 15142 flow [2024-06-27 17:02:49,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 868 transitions, 14103 flow, removed 467 selfloop flow, removed 8 redundant places. [2024-06-27 17:02:49,372 INFO L231 Difference]: Finished difference. Result has 273 places, 719 transitions, 12010 flow [2024-06-27 17:02:49,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10166, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12010, PETRI_PLACES=273, PETRI_TRANSITIONS=719} [2024-06-27 17:02:49,372 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 244 predicate places. [2024-06-27 17:02:49,372 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 719 transitions, 12010 flow [2024-06-27 17:02:49,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:49,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:49,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:49,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-27 17:02:49,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:49,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1518259478, now seen corresponding path program 11 times [2024-06-27 17:02:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179759247] [2024-06-27 17:02:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:02:49,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:49,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179759247] [2024-06-27 17:02:49,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179759247] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:49,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337569208] [2024-06-27 17:02:49,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:02:49,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:49,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:49,661 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:49,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-27 17:02:49,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:49,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 17:02:49,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:49,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337569208] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:49,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:49,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-06-27 17:02:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832954984] [2024-06-27 17:02:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:49,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:02:49,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:02:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:02:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:49,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 719 transitions, 12010 flow. Second operand has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:51,488 INFO L124 PetriNetUnfolderBase]: 3567/5109 cut-off events. [2024-06-27 17:02:51,489 INFO L125 PetriNetUnfolderBase]: For 75716/75716 co-relation queries the response was YES. [2024-06-27 17:02:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44360 conditions, 5109 events. 3567/5109 cut-off events. For 75716/75716 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24434 event pairs, 139 based on Foata normal form. 70/5179 useless extension candidates. Maximal degree in co-relation 44282. Up to 1632 conditions per place. [2024-06-27 17:02:51,533 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 408 selfloop transitions, 624 changer transitions 0/1033 dead transitions. [2024-06-27 17:02:51,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 1033 transitions, 18195 flow [2024-06-27 17:02:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-06-27 17:02:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-06-27 17:02:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 472 transitions. [2024-06-27 17:02:51,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37194641449960597 [2024-06-27 17:02:51,534 INFO L175 Difference]: Start difference. First operand has 273 places, 719 transitions, 12010 flow. Second operand 47 states and 472 transitions. [2024-06-27 17:02:51,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 1033 transitions, 18195 flow [2024-06-27 17:02:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1033 transitions, 16990 flow, removed 202 selfloop flow, removed 15 redundant places. [2024-06-27 17:02:52,003 INFO L231 Difference]: Finished difference. Result has 301 places, 816 transitions, 14119 flow [2024-06-27 17:02:52,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10789, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=14119, PETRI_PLACES=301, PETRI_TRANSITIONS=816} [2024-06-27 17:02:52,004 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2024-06-27 17:02:52,004 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 816 transitions, 14119 flow [2024-06-27 17:02:52,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.421052631578948) internal successors, (122), 19 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:52,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:52,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:52,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-06-27 17:02:52,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-27 17:02:52,208 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:52,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1732653654, now seen corresponding path program 12 times [2024-06-27 17:02:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559825672] [2024-06-27 17:02:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:52,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559825672] [2024-06-27 17:02:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559825672] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091165613] [2024-06-27 17:02:52,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:02:52,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:52,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:52,283 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:52,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-27 17:02:52,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:02:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:52,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:52,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:52,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:52,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091165613] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:52,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:52,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-06-27 17:02:52,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140279663] [2024-06-27 17:02:52,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:52,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:02:52,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:02:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:02:52,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:52,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 816 transitions, 14119 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:52,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:52,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:53,375 INFO L124 PetriNetUnfolderBase]: 3596/5158 cut-off events. [2024-06-27 17:02:53,375 INFO L125 PetriNetUnfolderBase]: For 74478/74478 co-relation queries the response was YES. [2024-06-27 17:02:53,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45458 conditions, 5158 events. 3596/5158 cut-off events. For 74478/74478 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 24751 event pairs, 857 based on Foata normal form. 20/5178 useless extension candidates. Maximal degree in co-relation 45381. Up to 4302 conditions per place. [2024-06-27 17:02:53,417 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 684 selfloop transitions, 185 changer transitions 0/870 dead transitions. [2024-06-27 17:02:53,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 870 transitions, 16594 flow [2024-06-27 17:02:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 17:02:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 17:02:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-27 17:02:53,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-27 17:02:53,418 INFO L175 Difference]: Start difference. First operand has 301 places, 816 transitions, 14119 flow. Second operand 11 states and 110 transitions. [2024-06-27 17:02:53,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 870 transitions, 16594 flow [2024-06-27 17:02:53,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 870 transitions, 14705 flow, removed 483 selfloop flow, removed 22 redundant places. [2024-06-27 17:02:53,941 INFO L231 Difference]: Finished difference. Result has 290 places, 821 transitions, 12824 flow [2024-06-27 17:02:53,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12352, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12824, PETRI_PLACES=290, PETRI_TRANSITIONS=821} [2024-06-27 17:02:53,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 261 predicate places. [2024-06-27 17:02:53,941 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 821 transitions, 12824 flow [2024-06-27 17:02:53,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:53,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:53,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:53,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-06-27 17:02:54,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-27 17:02:54,142 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:54,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash -354849624, now seen corresponding path program 13 times [2024-06-27 17:02:54,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:54,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186458684] [2024-06-27 17:02:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186458684] [2024-06-27 17:02:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186458684] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688625975] [2024-06-27 17:02:54,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:02:54,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:54,217 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:54,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-27 17:02:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:54,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:54,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:54,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688625975] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:54,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-06-27 17:02:54,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108839376] [2024-06-27 17:02:54,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:02:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:02:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:02:54,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:54,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 821 transitions, 12824 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:54,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:54,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:54,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:55,353 INFO L124 PetriNetUnfolderBase]: 3709/5356 cut-off events. [2024-06-27 17:02:55,353 INFO L125 PetriNetUnfolderBase]: For 66504/66504 co-relation queries the response was YES. [2024-06-27 17:02:55,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42493 conditions, 5356 events. 3709/5356 cut-off events. For 66504/66504 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 26104 event pairs, 450 based on Foata normal form. 17/5373 useless extension candidates. Maximal degree in co-relation 42417. Up to 2125 conditions per place. [2024-06-27 17:02:55,400 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 600 selfloop transitions, 301 changer transitions 0/902 dead transitions. [2024-06-27 17:02:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 902 transitions, 15674 flow [2024-06-27 17:02:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:02:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:02:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-27 17:02:55,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-06-27 17:02:55,401 INFO L175 Difference]: Start difference. First operand has 290 places, 821 transitions, 12824 flow. Second operand 10 states and 104 transitions. [2024-06-27 17:02:55,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 902 transitions, 15674 flow [2024-06-27 17:02:55,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 902 transitions, 15283 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 17:02:55,877 INFO L231 Difference]: Finished difference. Result has 291 places, 825 transitions, 13167 flow [2024-06-27 17:02:55,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12441, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13167, PETRI_PLACES=291, PETRI_TRANSITIONS=825} [2024-06-27 17:02:55,878 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-06-27 17:02:55,878 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 825 transitions, 13167 flow [2024-06-27 17:02:55,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:55,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:55,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:55,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:56,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:56,090 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:56,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1642167738, now seen corresponding path program 14 times [2024-06-27 17:02:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160584699] [2024-06-27 17:02:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160584699] [2024-06-27 17:02:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160584699] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552541679] [2024-06-27 17:02:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:02:56,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:56,170 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:56,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-27 17:02:56,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:02:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:56,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:56,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:56,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:56,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552541679] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:56,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:56,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-06-27 17:02:56,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843514260] [2024-06-27 17:02:56,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:56,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-27 17:02:56,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-27 17:02:56,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-06-27 17:02:56,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:56,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 825 transitions, 13167 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:56,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:56,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:56,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:57,408 INFO L124 PetriNetUnfolderBase]: 3680/5304 cut-off events. [2024-06-27 17:02:57,408 INFO L125 PetriNetUnfolderBase]: For 66497/66497 co-relation queries the response was YES. [2024-06-27 17:02:57,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42637 conditions, 5304 events. 3680/5304 cut-off events. For 66497/66497 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25642 event pairs, 789 based on Foata normal form. 20/5324 useless extension candidates. Maximal degree in co-relation 42560. Up to 3695 conditions per place. [2024-06-27 17:02:57,459 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 631 selfloop transitions, 256 changer transitions 0/888 dead transitions. [2024-06-27 17:02:57,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 888 transitions, 15596 flow [2024-06-27 17:02:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:02:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:02:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-06-27 17:02:57,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2024-06-27 17:02:57,460 INFO L175 Difference]: Start difference. First operand has 291 places, 825 transitions, 13167 flow. Second operand 12 states and 124 transitions. [2024-06-27 17:02:57,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 888 transitions, 15596 flow [2024-06-27 17:02:57,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 888 transitions, 15091 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:02:57,980 INFO L231 Difference]: Finished difference. Result has 296 places, 825 transitions, 13206 flow [2024-06-27 17:02:57,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12590, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13206, PETRI_PLACES=296, PETRI_TRANSITIONS=825} [2024-06-27 17:02:57,981 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 267 predicate places. [2024-06-27 17:02:57,981 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 825 transitions, 13206 flow [2024-06-27 17:02:57,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:57,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:02:57,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:02:57,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-27 17:02:58,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-27 17:02:58,182 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:02:58,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:02:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash -336415598, now seen corresponding path program 15 times [2024-06-27 17:02:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:02:58,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533925855] [2024-06-27 17:02:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:02:58,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:02:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:02:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:02:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533925855] [2024-06-27 17:02:58,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533925855] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:02:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700322351] [2024-06-27 17:02:58,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:02:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:02:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:02:58,256 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:02:58,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-27 17:02:58,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:02:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:02:58,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:02:58,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:02:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:58,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:02:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:02:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700322351] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:02:58,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:02:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-06-27 17:02:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349208749] [2024-06-27 17:02:58,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:02:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 17:02:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:02:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 17:02:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-06-27 17:02:58,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:02:58,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 825 transitions, 13206 flow. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:02:58,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:02:58,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:02:58,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:02:59,541 INFO L124 PetriNetUnfolderBase]: 3655/5258 cut-off events. [2024-06-27 17:02:59,541 INFO L125 PetriNetUnfolderBase]: For 65513/65513 co-relation queries the response was YES. [2024-06-27 17:02:59,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42391 conditions, 5258 events. 3655/5258 cut-off events. For 65513/65513 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 25334 event pairs, 347 based on Foata normal form. 17/5275 useless extension candidates. Maximal degree in co-relation 42313. Up to 1697 conditions per place. [2024-06-27 17:02:59,587 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 564 selfloop transitions, 399 changer transitions 0/964 dead transitions. [2024-06-27 17:02:59,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 964 transitions, 16689 flow [2024-06-27 17:02:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 17:02:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 17:02:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 203 transitions. [2024-06-27 17:02:59,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176954732510288 [2024-06-27 17:02:59,588 INFO L175 Difference]: Start difference. First operand has 296 places, 825 transitions, 13206 flow. Second operand 18 states and 203 transitions. [2024-06-27 17:02:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 964 transitions, 16689 flow [2024-06-27 17:03:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 964 transitions, 16136 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-27 17:03:00,056 INFO L231 Difference]: Finished difference. Result has 297 places, 817 transitions, 13308 flow [2024-06-27 17:03:00,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12510, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13308, PETRI_PLACES=297, PETRI_TRANSITIONS=817} [2024-06-27 17:03:00,057 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 268 predicate places. [2024-06-27 17:03:00,057 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 817 transitions, 13308 flow [2024-06-27 17:03:00,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:00,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:00,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:00,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:00,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-27 17:03:00,269 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:00,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:00,269 INFO L85 PathProgramCache]: Analyzing trace with hash -353881067, now seen corresponding path program 12 times [2024-06-27 17:03:00,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:00,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267195395] [2024-06-27 17:03:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:00,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267195395] [2024-06-27 17:03:00,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267195395] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:00,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621452032] [2024-06-27 17:03:00,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:03:00,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:00,344 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:00,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-27 17:03:00,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 17:03:00,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:00,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:03:00,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:00,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621452032] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:00,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:00,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-06-27 17:03:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225541604] [2024-06-27 17:03:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-27 17:03:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-27 17:03:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-06-27 17:03:00,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:03:00,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 817 transitions, 13308 flow. Second operand has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:00,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:00,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:03:00,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:01,452 INFO L124 PetriNetUnfolderBase]: 3692/5320 cut-off events. [2024-06-27 17:03:01,452 INFO L125 PetriNetUnfolderBase]: For 65618/65618 co-relation queries the response was YES. [2024-06-27 17:03:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43516 conditions, 5320 events. 3692/5320 cut-off events. For 65618/65618 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 25720 event pairs, 790 based on Foata normal form. 25/5345 useless extension candidates. Maximal degree in co-relation 43441. Up to 3701 conditions per place. [2024-06-27 17:03:01,494 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 651 selfloop transitions, 229 changer transitions 0/881 dead transitions. [2024-06-27 17:03:01,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 881 transitions, 15726 flow [2024-06-27 17:03:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 17:03:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 17:03:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-27 17:03:01,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-27 17:03:01,495 INFO L175 Difference]: Start difference. First operand has 297 places, 817 transitions, 13308 flow. Second operand 10 states and 99 transitions. [2024-06-27 17:03:01,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 881 transitions, 15726 flow [2024-06-27 17:03:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 881 transitions, 14934 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-06-27 17:03:01,946 INFO L231 Difference]: Finished difference. Result has 290 places, 829 transitions, 13153 flow [2024-06-27 17:03:01,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12516, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13153, PETRI_PLACES=290, PETRI_TRANSITIONS=829} [2024-06-27 17:03:01,946 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 261 predicate places. [2024-06-27 17:03:01,946 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 829 transitions, 13153 flow [2024-06-27 17:03:01,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.0) internal successors, (114), 19 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:01,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:01,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:01,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:02,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-06-27 17:03:02,148 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:02,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:02,148 INFO L85 PathProgramCache]: Analyzing trace with hash -335447041, now seen corresponding path program 13 times [2024-06-27 17:03:02,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:02,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468893535] [2024-06-27 17:03:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:02,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468893535] [2024-06-27 17:03:02,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468893535] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:02,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960350127] [2024-06-27 17:03:02,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:03:02,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:02,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:02,227 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:02,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-27 17:03:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:02,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 17:03:02,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:02,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:03:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960350127] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:02,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:02,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-27 17:03:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791517887] [2024-06-27 17:03:02,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:02,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 17:03:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 17:03:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-06-27 17:03:02,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:03:02,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 829 transitions, 13153 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:02,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:02,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:03:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:03,423 INFO L124 PetriNetUnfolderBase]: 3655/5254 cut-off events. [2024-06-27 17:03:03,423 INFO L125 PetriNetUnfolderBase]: For 64454/64454 co-relation queries the response was YES. [2024-06-27 17:03:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42278 conditions, 5254 events. 3655/5254 cut-off events. For 64454/64454 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 25211 event pairs, 790 based on Foata normal form. 25/5279 useless extension candidates. Maximal degree in co-relation 42203. Up to 3701 conditions per place. [2024-06-27 17:03:03,467 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 628 selfloop transitions, 263 changer transitions 0/892 dead transitions. [2024-06-27 17:03:03,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 892 transitions, 15526 flow [2024-06-27 17:03:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 17:03:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 17:03:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-06-27 17:03:03,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789173789173789 [2024-06-27 17:03:03,468 INFO L175 Difference]: Start difference. First operand has 290 places, 829 transitions, 13153 flow. Second operand 13 states and 133 transitions. [2024-06-27 17:03:03,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 892 transitions, 15526 flow [2024-06-27 17:03:03,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 892 transitions, 15011 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 17:03:03,923 INFO L231 Difference]: Finished difference. Result has 292 places, 821 transitions, 13041 flow [2024-06-27 17:03:03,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12515, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13041, PETRI_PLACES=292, PETRI_TRANSITIONS=821} [2024-06-27 17:03:03,923 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 263 predicate places. [2024-06-27 17:03:03,924 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 821 transitions, 13041 flow [2024-06-27 17:03:03,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:03,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:03,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:03,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-06-27 17:03:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:04,125 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:04,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1069911083, now seen corresponding path program 7 times [2024-06-27 17:03:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:04,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252935237] [2024-06-27 17:03:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:04,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:04,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252935237] [2024-06-27 17:03:04,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252935237] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:04,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90137761] [2024-06-27 17:03:04,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:03:04,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:04,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:04,637 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:04,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-27 17:03:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:04,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 17:03:04,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:04,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:03:05,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:03:05,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-06-27 17:03:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:05,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:05,505 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 64 treesize of output 56 [2024-06-27 17:03:05,520 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-06-27 17:03:05,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 194 [2024-06-27 17:03:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:07,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90137761] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:03:07,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:03:07,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-06-27 17:03:07,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560539949] [2024-06-27 17:03:07,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:03:07,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:03:07,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:03:07,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:03:07,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:03:07,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:03:07,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 821 transitions, 13041 flow. Second operand has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:07,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:03:07,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:03:07,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:03:10,754 INFO L124 PetriNetUnfolderBase]: 5334/7682 cut-off events. [2024-06-27 17:03:10,754 INFO L125 PetriNetUnfolderBase]: For 97626/97626 co-relation queries the response was YES. [2024-06-27 17:03:10,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64263 conditions, 7682 events. 5334/7682 cut-off events. For 97626/97626 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 39769 event pairs, 330 based on Foata normal form. 4/7686 useless extension candidates. Maximal degree in co-relation 64188. Up to 5709 conditions per place. [2024-06-27 17:03:10,820 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1029 selfloop transitions, 494 changer transitions 8/1532 dead transitions. [2024-06-27 17:03:10,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1532 transitions, 27534 flow [2024-06-27 17:03:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 17:03:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 17:03:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 399 transitions. [2024-06-27 17:03:10,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095785440613027 [2024-06-27 17:03:10,821 INFO L175 Difference]: Start difference. First operand has 292 places, 821 transitions, 13041 flow. Second operand 29 states and 399 transitions. [2024-06-27 17:03:10,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1532 transitions, 27534 flow [2024-06-27 17:03:11,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 1532 transitions, 26420 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-27 17:03:11,645 INFO L231 Difference]: Finished difference. Result has 326 places, 1233 transitions, 21991 flow [2024-06-27 17:03:11,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12491, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=21991, PETRI_PLACES=326, PETRI_TRANSITIONS=1233} [2024-06-27 17:03:11,646 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 297 predicate places. [2024-06-27 17:03:11,646 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1233 transitions, 21991 flow [2024-06-27 17:03:11,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:03:11,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:03:11,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:03:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-06-27 17:03:11,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:11,858 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:03:11,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:03:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1013668623, now seen corresponding path program 8 times [2024-06-27 17:03:11,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:03:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139148394] [2024-06-27 17:03:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:03:11,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:03:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:03:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:12,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:03:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139148394] [2024-06-27 17:03:12,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139148394] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:03:12,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465156261] [2024-06-27 17:03:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:03:12,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:03:12,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:03:12,292 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:03:12,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-27 17:03:12,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:03:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:03:12,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjunts are in the unsatisfiable core [2024-06-27 17:03:12,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:03:12,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:03:12,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:03:12,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-06-27 17:03:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:03:12,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:03:13,076 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 65 treesize of output 57 [2024-06-27 17:03:13,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:03:13,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 218 [2024-06-27 17:03:26,147 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:30,389 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:48,905 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:56,146 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:56,268 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:58,376 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:58,520 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:03:58,667 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:59,044 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:59,305 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:03:59,813 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:03,654 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:10,778 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:11,041 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:14,307 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:14,379 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:14,526 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:14,877 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:14,901 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:15,090 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:15,347 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:15,566 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:15,684 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:15,859 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:15,989 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:16,127 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:16,314 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:16,478 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:16,685 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:16,945 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:17,091 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:17,270 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:17,519 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:18,000 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,049 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:18,255 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,322 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,469 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:18,693 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,734 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,861 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:18,943 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:19,221 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:19,325 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:19,589 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:19,935 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:20,433 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:20,692 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:21,098 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:26,695 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:29,595 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:30,511 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:30,841 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:31,029 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:31,221 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:32,010 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:32,187 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:32,631 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:32,858 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:33,024 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:33,165 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:33,323 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:34,089 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:34,451 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:34,612 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:34,699 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:35,017 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:35,136 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:35,183 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:36,012 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:36,347 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:37,240 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:37,934 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:38,472 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:38,568 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:38,665 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:38,821 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:38,989 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:39,030 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:39,182 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:39,390 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:39,561 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:39,773 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:39,918 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:40,039 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:41,455 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:42,339 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:43,094 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:43,858 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:44,525 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:44,637 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:44,818 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:44,885 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:44,938 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:44,995 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:45,363 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:45,666 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:46,287 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:47,763 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:48,338 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:48,852 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-06-27 17:04:49,223 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:50,700 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:50,747 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:55,874 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:57,315 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:57,551 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:04:58,101 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:04:59,307 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:04:59,717 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:00,061 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:06,905 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:07,191 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:07,270 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:07,433 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:07,860 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:05:08,491 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:08,523 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:08,573 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:10,441 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:10,464 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:10,495 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:10,953 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:11,452 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:11,863 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:15,142 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:15,341 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:15,380 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:15,474 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:15,662 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:15,876 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:18,593 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:18,755 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:18,798 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:19,392 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:19,847 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:20,057 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:21,755 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:23,724 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:25,563 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:26,402 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:26,614 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:05:27,008 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:27,314 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:27,621 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:28,721 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:28,792 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:28,834 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:28,905 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:28,965 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:29,009 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:29,086 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:32,044 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:32,993 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:34,381 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:34,502 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:34,821 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:34,977 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:35,318 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:35,807 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:36,308 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:36,438 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:36,769 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:37,124 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:37,522 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:38,100 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:38,484 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:38,661 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:47,626 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:48,424 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:48,996 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:49,652 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:49,958 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:51,108 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:51,292 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:52,402 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:53,456 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:53,594 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:53,875 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:54,255 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:54,524 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:54,654 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:55,702 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:05:56,202 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:05:56,674 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:01,530 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:01,868 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:03,945 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:04,357 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:04,650 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:04,672 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:04,795 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:04,909 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:04,935 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-06-27 17:06:04,973 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:05,002 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:05,288 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:05,694 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:14,679 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:16,555 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:16,753 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:21,081 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:21,374 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:21,736 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:23,135 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:25,458 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:26,189 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:30,466 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:30,521 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:30,577 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:30,821 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:36,357 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:36,879 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:37,041 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:37,521 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-06-27 17:06:37,711 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:06:38,091 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:08:04,496 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:08:38,186 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:08:57,973 WARN L293 SmtUtils]: Spent 7.42s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:10:06,561 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:10:07,387 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:10:09,211 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:10:42,229 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:11:54,933 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:12:09,541 WARN L293 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-06-27 17:12:19,741 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:12:27,530 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-06-27 17:12:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465156261] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:36,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:36,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-06-27 17:12:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27027332] [2024-06-27 17:12:36,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:36,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:12:36,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:12:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:12:36,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:12:36,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1233 transitions, 21991 flow. Second operand has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:36,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:36,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:12:36,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:40,418 INFO L124 PetriNetUnfolderBase]: 6204/8912 cut-off events. [2024-06-27 17:12:40,418 INFO L125 PetriNetUnfolderBase]: For 131564/131564 co-relation queries the response was YES. [2024-06-27 17:12:40,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78043 conditions, 8912 events. 6204/8912 cut-off events. For 131564/131564 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 46873 event pairs, 369 based on Foata normal form. 4/8916 useless extension candidates. Maximal degree in co-relation 77951. Up to 6634 conditions per place. [2024-06-27 17:12:40,519 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 1059 selfloop transitions, 615 changer transitions 10/1685 dead transitions. [2024-06-27 17:12:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1685 transitions, 31986 flow [2024-06-27 17:12:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 17:12:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 17:12:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 353 transitions. [2024-06-27 17:12:40,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842249657064472 [2024-06-27 17:12:40,521 INFO L175 Difference]: Start difference. First operand has 326 places, 1233 transitions, 21991 flow. Second operand 27 states and 353 transitions. [2024-06-27 17:12:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1685 transitions, 31986 flow [2024-06-27 17:12:41,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1685 transitions, 29664 flow, removed 1159 selfloop flow, removed 2 redundant places. [2024-06-27 17:12:41,974 INFO L231 Difference]: Finished difference. Result has 365 places, 1452 transitions, 25688 flow [2024-06-27 17:12:41,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=20187, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=25688, PETRI_PLACES=365, PETRI_TRANSITIONS=1452} [2024-06-27 17:12:41,975 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 336 predicate places. [2024-06-27 17:12:41,975 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1452 transitions, 25688 flow [2024-06-27 17:12:41,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:41,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:41,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:41,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-06-27 17:12:42,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-27 17:12:42,176 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:12:42,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash 715378711, now seen corresponding path program 9 times [2024-06-27 17:12:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:42,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476976906] [2024-06-27 17:12:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476976906] [2024-06-27 17:12:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476976906] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565644537] [2024-06-27 17:12:42,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:12:42,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:42,645 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:42,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-27 17:12:42,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:12:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:42,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 17:12:42,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:42,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:12:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-06-27 17:12:43,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:12:43,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2024-06-27 17:12:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:43,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:12:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565644537] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:43,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:43,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 32 [2024-06-27 17:12:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543055044] [2024-06-27 17:12:43,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:43,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-27 17:12:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-27 17:12:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2024-06-27 17:12:43,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:12:43,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1452 transitions, 25688 flow. Second operand has 33 states, 33 states have (on average 6.151515151515151) internal successors, (203), 33 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:43,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:43,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:12:43,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:47,080 INFO L124 PetriNetUnfolderBase]: 6624/9505 cut-off events. [2024-06-27 17:12:47,080 INFO L125 PetriNetUnfolderBase]: For 137270/137270 co-relation queries the response was YES. [2024-06-27 17:12:47,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83664 conditions, 9505 events. 6624/9505 cut-off events. For 137270/137270 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 50602 event pairs, 367 based on Foata normal form. 1/9506 useless extension candidates. Maximal degree in co-relation 83556. Up to 7428 conditions per place. [2024-06-27 17:12:47,180 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1227 selfloop transitions, 600 changer transitions 2/1830 dead transitions. [2024-06-27 17:12:47,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1830 transitions, 34956 flow [2024-06-27 17:12:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 17:12:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 17:12:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 407 transitions. [2024-06-27 17:12:47,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4862604540023895 [2024-06-27 17:12:47,181 INFO L175 Difference]: Start difference. First operand has 365 places, 1452 transitions, 25688 flow. Second operand 31 states and 407 transitions. [2024-06-27 17:12:47,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1830 transitions, 34956 flow [2024-06-27 17:12:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1830 transitions, 33817 flow, removed 469 selfloop flow, removed 6 redundant places. [2024-06-27 17:12:49,009 INFO L231 Difference]: Finished difference. Result has 405 places, 1558 transitions, 28244 flow [2024-06-27 17:12:49,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=24575, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=28244, PETRI_PLACES=405, PETRI_TRANSITIONS=1558} [2024-06-27 17:12:49,010 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 376 predicate places. [2024-06-27 17:12:49,010 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1558 transitions, 28244 flow [2024-06-27 17:12:49,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.151515151515151) internal successors, (203), 33 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:49,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:12:49,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:12:49,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-06-27 17:12:49,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-27 17:12:49,211 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:12:49,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:12:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1067717863, now seen corresponding path program 10 times [2024-06-27 17:12:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:12:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618545359] [2024-06-27 17:12:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:12:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:12:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:12:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:12:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618545359] [2024-06-27 17:12:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618545359] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:12:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828382829] [2024-06-27 17:12:49,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:12:49,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:12:49,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:12:49,637 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:12:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-27 17:12:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:12:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:12:49,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 17:12:49,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:12:49,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-27 17:12:50,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:12:50,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-06-27 17:12:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:50,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:12:50,410 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 65 treesize of output 57 [2024-06-27 17:12:50,428 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-06-27 17:12:50,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 210 [2024-06-27 17:12:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:12:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828382829] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:12:51,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:12:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2024-06-27 17:12:51,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882930978] [2024-06-27 17:12:51,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:12:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:12:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:12:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:12:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:12:51,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:12:51,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1558 transitions, 28244 flow. Second operand has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:12:51,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:12:51,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:12:51,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:12:56,963 INFO L124 PetriNetUnfolderBase]: 8526/12302 cut-off events. [2024-06-27 17:12:56,963 INFO L125 PetriNetUnfolderBase]: For 186515/186515 co-relation queries the response was YES. [2024-06-27 17:12:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109090 conditions, 12302 events. 8526/12302 cut-off events. For 186515/186515 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 69192 event pairs, 459 based on Foata normal form. 4/12306 useless extension candidates. Maximal degree in co-relation 108965. Up to 8705 conditions per place. [2024-06-27 17:12:57,114 INFO L140 encePairwiseOnDemand]: 13/27 looper letters, 1529 selfloop transitions, 941 changer transitions 11/2482 dead transitions. [2024-06-27 17:12:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2482 transitions, 47443 flow [2024-06-27 17:12:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 17:12:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 17:12:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 462 transitions. [2024-06-27 17:12:57,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-27 17:12:57,116 INFO L175 Difference]: Start difference. First operand has 405 places, 1558 transitions, 28244 flow. Second operand 36 states and 462 transitions. [2024-06-27 17:12:57,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2482 transitions, 47443 flow [2024-06-27 17:12:59,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 2482 transitions, 45919 flow, removed 465 selfloop flow, removed 14 redundant places. [2024-06-27 17:13:00,032 INFO L231 Difference]: Finished difference. Result has 447 places, 2055 transitions, 38513 flow [2024-06-27 17:13:00,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=26783, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=38513, PETRI_PLACES=447, PETRI_TRANSITIONS=2055} [2024-06-27 17:13:00,034 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 418 predicate places. [2024-06-27 17:13:00,034 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 2055 transitions, 38513 flow [2024-06-27 17:13:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:00,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:00,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:00,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-06-27 17:13:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-27 17:13:00,235 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:13:00,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1253234289, now seen corresponding path program 11 times [2024-06-27 17:13:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:00,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160803727] [2024-06-27 17:13:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:00,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160803727] [2024-06-27 17:13:00,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160803727] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:00,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929911602] [2024-06-27 17:13:00,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:13:00,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:00,706 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:00,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-27 17:13:00,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:00,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:13:00,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:01,049 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-06-27 17:13:01,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 20 [2024-06-27 17:13:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:01,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:01,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:01,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 49 [2024-06-27 17:13:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:02,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929911602] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:02,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:02,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2024-06-27 17:13:02,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621907557] [2024-06-27 17:13:02,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-27 17:13:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-27 17:13:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-06-27 17:13:02,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:13:02,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 2055 transitions, 38513 flow. Second operand has 31 states, 31 states have (on average 6.290322580645161) internal successors, (195), 31 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:02,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:02,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:13:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:08,614 INFO L124 PetriNetUnfolderBase]: 8843/12749 cut-off events. [2024-06-27 17:13:08,615 INFO L125 PetriNetUnfolderBase]: For 216973/216973 co-relation queries the response was YES. [2024-06-27 17:13:08,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119177 conditions, 12749 events. 8843/12749 cut-off events. For 216973/216973 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 71920 event pairs, 498 based on Foata normal form. 1/12750 useless extension candidates. Maximal degree in co-relation 119032. Up to 10423 conditions per place. [2024-06-27 17:13:08,759 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1716 selfloop transitions, 692 changer transitions 2/2411 dead transitions. [2024-06-27 17:13:08,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2411 transitions, 48689 flow [2024-06-27 17:13:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 17:13:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 17:13:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 435 transitions. [2024-06-27 17:13:08,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2024-06-27 17:13:08,760 INFO L175 Difference]: Start difference. First operand has 447 places, 2055 transitions, 38513 flow. Second operand 34 states and 435 transitions. [2024-06-27 17:13:08,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2411 transitions, 48689 flow [2024-06-27 17:13:11,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 2411 transitions, 45856 flow, removed 1282 selfloop flow, removed 9 redundant places. [2024-06-27 17:13:12,023 INFO L231 Difference]: Finished difference. Result has 489 places, 2165 transitions, 39590 flow [2024-06-27 17:13:12,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=35710, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=39590, PETRI_PLACES=489, PETRI_TRANSITIONS=2165} [2024-06-27 17:13:12,024 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 460 predicate places. [2024-06-27 17:13:12,024 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 2165 transitions, 39590 flow [2024-06-27 17:13:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.290322580645161) internal successors, (195), 31 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:12,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:12,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:12,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-06-27 17:13:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:12,236 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:13:12,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash 314327194, now seen corresponding path program 14 times [2024-06-27 17:13:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27409130] [2024-06-27 17:13:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27409130] [2024-06-27 17:13:12,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27409130] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462261284] [2024-06-27 17:13:12,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:13:12,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:12,611 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:12,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-06-27 17:13:12,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:12,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-27 17:13:12,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:12,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:12,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 17:13:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:12,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:13,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:13,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 49 [2024-06-27 17:13:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:16,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462261284] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:16,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:16,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2024-06-27 17:13:16,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213875852] [2024-06-27 17:13:16,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 17:13:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 17:13:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2024-06-27 17:13:16,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:13:16,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 2165 transitions, 39590 flow. Second operand has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:16,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:16,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:13:16,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:22,069 INFO L124 PetriNetUnfolderBase]: 9258/13349 cut-off events. [2024-06-27 17:13:22,069 INFO L125 PetriNetUnfolderBase]: For 213118/213118 co-relation queries the response was YES. [2024-06-27 17:13:22,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122158 conditions, 13349 events. 9258/13349 cut-off events. For 213118/213118 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 75724 event pairs, 555 based on Foata normal form. 3/13352 useless extension candidates. Maximal degree in co-relation 121994. Up to 10925 conditions per place. [2024-06-27 17:13:22,231 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 1739 selfloop transitions, 636 changer transitions 1/2377 dead transitions. [2024-06-27 17:13:22,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 2377 transitions, 47619 flow [2024-06-27 17:13:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 17:13:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 17:13:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 211 transitions. [2024-06-27 17:13:22,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-27 17:13:22,232 INFO L175 Difference]: Start difference. First operand has 489 places, 2165 transitions, 39590 flow. Second operand 16 states and 211 transitions. [2024-06-27 17:13:22,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 2377 transitions, 47619 flow [2024-06-27 17:13:25,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 2377 transitions, 46612 flow, removed 290 selfloop flow, removed 10 redundant places. [2024-06-27 17:13:25,883 INFO L231 Difference]: Finished difference. Result has 496 places, 2210 transitions, 41071 flow [2024-06-27 17:13:25,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=38585, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=592, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41071, PETRI_PLACES=496, PETRI_TRANSITIONS=2210} [2024-06-27 17:13:25,885 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 467 predicate places. [2024-06-27 17:13:25,886 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 2210 transitions, 41071 flow [2024-06-27 17:13:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.6923076923076925) internal successors, (174), 26 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:25,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:25,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:25,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-06-27 17:13:26,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:26,097 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:13:26,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash -31941090, now seen corresponding path program 16 times [2024-06-27 17:13:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420169984] [2024-06-27 17:13:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:26,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420169984] [2024-06-27 17:13:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420169984] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815961695] [2024-06-27 17:13:26,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:13:26,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:26,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:26,526 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:26,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-06-27 17:13:26,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:13:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:26,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 17:13:26,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:26,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:13:26,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2024-06-27 17:13:27,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:27,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 27 [2024-06-27 17:13:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:27,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815961695] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:27,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 34 [2024-06-27 17:13:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164371273] [2024-06-27 17:13:27,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:13:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:13:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:13:27,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:13:27,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 2210 transitions, 41071 flow. Second operand has 35 states, 35 states have (on average 6.0285714285714285) internal successors, (211), 35 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:27,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:27,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:13:27,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:34,305 INFO L124 PetriNetUnfolderBase]: 9796/14200 cut-off events. [2024-06-27 17:13:34,305 INFO L125 PetriNetUnfolderBase]: For 237303/237303 co-relation queries the response was YES. [2024-06-27 17:13:34,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132622 conditions, 14200 events. 9796/14200 cut-off events. For 237303/237303 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 82338 event pairs, 609 based on Foata normal form. 1/14201 useless extension candidates. Maximal degree in co-relation 132455. Up to 11577 conditions per place. [2024-06-27 17:13:34,483 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 1804 selfloop transitions, 707 changer transitions 2/2514 dead transitions. [2024-06-27 17:13:34,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 2514 transitions, 51277 flow [2024-06-27 17:13:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 17:13:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 17:13:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 218 transitions. [2024-06-27 17:13:34,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749455337690632 [2024-06-27 17:13:34,484 INFO L175 Difference]: Start difference. First operand has 496 places, 2210 transitions, 41071 flow. Second operand 17 states and 218 transitions. [2024-06-27 17:13:34,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 2514 transitions, 51277 flow [2024-06-27 17:13:38,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 2514 transitions, 50205 flow, removed 194 selfloop flow, removed 12 redundant places. [2024-06-27 17:13:38,894 INFO L231 Difference]: Finished difference. Result has 506 places, 2348 transitions, 44721 flow [2024-06-27 17:13:38,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=40089, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=44721, PETRI_PLACES=506, PETRI_TRANSITIONS=2348} [2024-06-27 17:13:38,896 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 477 predicate places. [2024-06-27 17:13:38,896 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 2348 transitions, 44721 flow [2024-06-27 17:13:38,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.0285714285714285) internal successors, (211), 35 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:38,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:38,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:38,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-06-27 17:13:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:39,107 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:13:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1731959310, now seen corresponding path program 17 times [2024-06-27 17:13:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921699589] [2024-06-27 17:13:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921699589] [2024-06-27 17:13:39,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921699589] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846885247] [2024-06-27 17:13:39,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:13:39,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:39,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:39,738 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:39,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-06-27 17:13:39,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:13:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 17:13:39,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:40,262 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-06-27 17:13:40,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 17 [2024-06-27 17:13:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:40,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:40,686 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:13:40,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 51 [2024-06-27 17:13:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:42,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846885247] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:42,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:42,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2024-06-27 17:13:42,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677501893] [2024-06-27 17:13:42,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:13:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:13:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:13:42,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:13:42,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 2348 transitions, 44721 flow. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:42,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:42,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:13:42,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:13:50,743 INFO L124 PetriNetUnfolderBase]: 10557/15288 cut-off events. [2024-06-27 17:13:50,743 INFO L125 PetriNetUnfolderBase]: For 274845/274845 co-relation queries the response was YES. [2024-06-27 17:13:51,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145093 conditions, 15288 events. 10557/15288 cut-off events. For 274845/274845 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 89268 event pairs, 743 based on Foata normal form. 5/15293 useless extension candidates. Maximal degree in co-relation 144919. Up to 13361 conditions per place. [2024-06-27 17:13:51,106 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 2205 selfloop transitions, 541 changer transitions 11/2758 dead transitions. [2024-06-27 17:13:51,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 2758 transitions, 56670 flow [2024-06-27 17:13:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:13:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:13:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 430 transitions. [2024-06-27 17:13:51,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 17:13:51,107 INFO L175 Difference]: Start difference. First operand has 506 places, 2348 transitions, 44721 flow. Second operand 35 states and 430 transitions. [2024-06-27 17:13:51,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 2758 transitions, 56670 flow [2024-06-27 17:13:55,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 2758 transitions, 55160 flow, removed 515 selfloop flow, removed 7 redundant places. [2024-06-27 17:13:55,978 INFO L231 Difference]: Finished difference. Result has 548 places, 2528 transitions, 48209 flow [2024-06-27 17:13:55,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=43296, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1885, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=48209, PETRI_PLACES=548, PETRI_TRANSITIONS=2528} [2024-06-27 17:13:55,980 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 519 predicate places. [2024-06-27 17:13:55,980 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 2528 transitions, 48209 flow [2024-06-27 17:13:55,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:55,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:13:55,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:13:55,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-06-27 17:13:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-06-27 17:13:56,181 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:13:56,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:13:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1253127638, now seen corresponding path program 15 times [2024-06-27 17:13:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:13:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6403776] [2024-06-27 17:13:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:13:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:13:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:13:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:13:56,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:13:56,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6403776] [2024-06-27 17:13:56,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6403776] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:13:56,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089283085] [2024-06-27 17:13:56,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:13:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:13:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:13:56,589 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:13:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-06-27 17:13:56,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:13:56,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:13:56,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:13:56,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:13:56,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:56,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 17:13:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:13:56,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:13:57,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:13:57,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 49 [2024-06-27 17:13:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:13:58,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089283085] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:13:58,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:13:58,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2024-06-27 17:13:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332996343] [2024-06-27 17:13:58,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:13:58,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:13:58,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:13:58,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:13:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:13:58,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:13:58,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 2528 transitions, 48209 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:13:58,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:13:58,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:13:58,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:14:05,625 INFO L124 PetriNetUnfolderBase]: 10985/15880 cut-off events. [2024-06-27 17:14:05,625 INFO L125 PetriNetUnfolderBase]: For 311420/311420 co-relation queries the response was YES. [2024-06-27 17:14:05,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153583 conditions, 15880 events. 10985/15880 cut-off events. For 311420/311420 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 92948 event pairs, 872 based on Foata normal form. 2/15882 useless extension candidates. Maximal degree in co-relation 153393. Up to 14390 conditions per place. [2024-06-27 17:14:05,836 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 2271 selfloop transitions, 485 changer transitions 2/2759 dead transitions. [2024-06-27 17:14:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 2759 transitions, 57457 flow [2024-06-27 17:14:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-27 17:14:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-27 17:14:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 287 transitions. [2024-06-27 17:14:05,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831649831649832 [2024-06-27 17:14:05,838 INFO L175 Difference]: Start difference. First operand has 548 places, 2528 transitions, 48209 flow. Second operand 22 states and 287 transitions. [2024-06-27 17:14:05,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 2759 transitions, 57457 flow [2024-06-27 17:14:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 2759 transitions, 55578 flow, removed 754 selfloop flow, removed 16 redundant places. [2024-06-27 17:14:10,858 INFO L231 Difference]: Finished difference. Result has 560 places, 2608 transitions, 49500 flow [2024-06-27 17:14:10,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=46330, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2074, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=49500, PETRI_PLACES=560, PETRI_TRANSITIONS=2608} [2024-06-27 17:14:10,860 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 531 predicate places. [2024-06-27 17:14:10,860 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2608 transitions, 49500 flow [2024-06-27 17:14:10,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:10,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:14:10,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:14:10,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-06-27 17:14:11,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-27 17:14:11,061 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:14:11,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:14:11,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1399389388, now seen corresponding path program 16 times [2024-06-27 17:14:11,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:14:11,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248392226] [2024-06-27 17:14:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:14:11,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:14:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:14:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:14:11,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:14:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248392226] [2024-06-27 17:14:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248392226] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:14:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005096452] [2024-06-27 17:14:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:14:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:14:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:14:11,481 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:14:11,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-06-27 17:14:11,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:14:11,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:14:11,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 17:14:11,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:14:11,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:11,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-06-27 17:14:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:14:11,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:14:11,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:14:11,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 49 [2024-06-27 17:14:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:14:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005096452] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:14:14,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:14:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2024-06-27 17:14:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447437771] [2024-06-27 17:14:14,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:14:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-27 17:14:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:14:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-27 17:14:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-06-27 17:14:14,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-06-27 17:14:14,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2608 transitions, 49500 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:14:14,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:14:14,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-06-27 17:14:14,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand