./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:27:06,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:27:06,188 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:27:06,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:27:06,194 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:27:06,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:27:06,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:27:06,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:27:06,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:27:06,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:27:06,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:27:06,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:27:06,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:27:06,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:27:06,226 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:27:06,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:27:06,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:27:06,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:27:06,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:27:06,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:27:06,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:27:06,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:27:06,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:27:06,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:27:06,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:27:06,232 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:27:06,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:27:06,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:27:06,233 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:27:06,233 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:27:06,233 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:27:06,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:27:06,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:27:06,234 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:27:06,234 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:27:06,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:27:06,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:27:06,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:27:06,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:27:06,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:27:06,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:27:06,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:27:06,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-10 10:27:06,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:27:06,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:27:06,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:27:06,501 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:27:06,501 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:27:06,502 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-10 10:27:07,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:27:08,122 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:27:08,122 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-10 10:27:08,130 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b221017af/f700a39ca0da4345a36f2cb04f88b6fa/FLAG39d62af8e [2024-11-10 10:27:08,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b221017af/f700a39ca0da4345a36f2cb04f88b6fa [2024-11-10 10:27:08,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:27:08,145 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:27:08,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:27:08,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:27:08,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:27:08,155 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7254d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08, skipping insertion in model container [2024-11-10 10:27:08,156 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:27:08,437 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-10 10:27:08,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:27:08,474 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:27:08,520 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2721,2734] [2024-11-10 10:27:08,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:27:08,541 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:27:08,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08 WrapperNode [2024-11-10 10:27:08,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:27:08,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:27:08,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:27:08,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:27:08,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,590 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 187 [2024-11-10 10:27:08,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:27:08,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:27:08,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:27:08,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:27:08,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,605 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,628 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 10:27:08,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,628 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,634 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,635 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:27:08,646 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:27:08,646 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:27:08,646 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:27:08,647 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (1/1) ... [2024-11-10 10:27:08,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:27:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:08,690 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) [2024-11-10 10:27:08,697 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 [2024-11-10 10:27:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:27:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:27:08,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:27:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:27:08,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:27:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:27:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:27:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:27:08,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:27:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:27:08,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:27:08,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:27:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:27:08,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:27:08,751 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:27:08,881 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:27:08,882 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:27:09,261 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:27:09,262 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:27:09,520 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:27:09,521 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:27:09,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:27:09 BoogieIcfgContainer [2024-11-10 10:27:09,522 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:27:09,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:27:09,525 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:27:09,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:27:09,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:27:08" (1/3) ... [2024-11-10 10:27:09,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a304b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:27:09, skipping insertion in model container [2024-11-10 10:27:09,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:27:08" (2/3) ... [2024-11-10 10:27:09,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a304b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:27:09, skipping insertion in model container [2024-11-10 10:27:09,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:27:09" (3/3) ... [2024-11-10 10:27:09,533 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-10 10:27:09,550 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:27:09,551 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:27:09,551 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:27:09,602 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:27:09,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-11-10 10:27:09,668 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-11-10 10:27:09,668 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:27:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-11-10 10:27:09,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-11-10 10:27:09,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-11-10 10:27:09,688 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:27:09,696 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d94620e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:27:09,697 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:27:09,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:27:09,715 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-11-10 10:27:09,715 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:27:09,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:09,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:09,717 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:09,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1335573352, now seen corresponding path program 1 times [2024-11-10 10:27:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898383393] [2024-11-10 10:27:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:27:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898383393] [2024-11-10 10:27:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898383393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:09,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:09,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:27:09,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615905472] [2024-11-10 10:27:09,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:09,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:27:09,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:27:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:27:09,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-10 10:27:09,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 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) [2024-11-10 10:27:09,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:09,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-10 10:27:09,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:10,052 INFO L124 PetriNetUnfolderBase]: 39/92 cut-off events. [2024-11-10 10:27:10,053 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-10 10:27:10,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 92 events. 39/92 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 219 event pairs, 22 based on Foata normal form. 17/104 useless extension candidates. Maximal degree in co-relation 136. Up to 72 conditions per place. [2024-11-10 10:27:10,057 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 18 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2024-11-10 10:27:10,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 102 flow [2024-11-10 10:27:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:27:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:27:10,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 44 transitions. [2024-11-10 10:27:10,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-11-10 10:27:10,098 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 2 states and 44 transitions. [2024-11-10 10:27:10,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 102 flow [2024-11-10 10:27:10,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:27:10,109 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 58 flow [2024-11-10 10:27:10,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2024-11-10 10:27:10,119 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-11-10 10:27:10,119 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 58 flow [2024-11-10 10:27:10,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 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) [2024-11-10 10:27:10,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:10,121 INFO L204 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] [2024-11-10 10:27:10,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:27:10,121 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:10,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1963043629, now seen corresponding path program 1 times [2024-11-10 10:27:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:10,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480876168] [2024-11-10 10:27:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:27:10,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:10,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480876168] [2024-11-10 10:27:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480876168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:10,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:10,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:27:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986852377] [2024-11-10 10:27:10,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:10,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:27:10,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:27:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:27:10,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:10,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:10,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:10,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:10,501 INFO L124 PetriNetUnfolderBase]: 39/96 cut-off events. [2024-11-10 10:27:10,502 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:27:10,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 96 events. 39/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 22 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 175. Up to 74 conditions per place. [2024-11-10 10:27:10,505 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 18 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2024-11-10 10:27:10,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 106 flow [2024-11-10 10:27:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:27:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:27:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-11-10 10:27:10,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 10:27:10,508 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 58 flow. Second operand 3 states and 51 transitions. [2024-11-10 10:27:10,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 106 flow [2024-11-10 10:27:10,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:27:10,513 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 82 flow [2024-11-10 10:27:10,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-10 10:27:10,514 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-11-10 10:27:10,514 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 82 flow [2024-11-10 10:27:10,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:10,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:10,515 INFO L204 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, 1, 1] [2024-11-10 10:27:10,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:27:10,515 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:10,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:10,516 INFO L85 PathProgramCache]: Analyzing trace with hash -794018874, now seen corresponding path program 1 times [2024-11-10 10:27:10,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:10,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968289568] [2024-11-10 10:27:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:27:10,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:10,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968289568] [2024-11-10 10:27:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968289568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294611178] [2024-11-10 10:27:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:10,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:10,637 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) [2024-11-10 10:27:10,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:27:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:10,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:27:10,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:27:10,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:27:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294611178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:10,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-10 10:27:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079250383] [2024-11-10 10:27:10,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:10,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:27:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:27:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:27:10,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:10,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-10 10:27:10,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:10,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:10,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:10,942 INFO L124 PetriNetUnfolderBase]: 39/108 cut-off events. [2024-11-10 10:27:10,942 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-10 10:27:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 108 events. 39/108 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 22 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 209. Up to 74 conditions per place. [2024-11-10 10:27:10,943 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 18 selfloop transitions, 10 changer transitions 0/35 dead transitions. [2024-11-10 10:27:10,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 162 flow [2024-11-10 10:27:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:27:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:27:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 88 transitions. [2024-11-10 10:27:10,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-11-10 10:27:10,946 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 82 flow. Second operand 6 states and 88 transitions. [2024-11-10 10:27:10,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 162 flow [2024-11-10 10:27:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:10,947 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 150 flow [2024-11-10 10:27:10,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-10 10:27:10,948 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-10 10:27:10,949 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 150 flow [2024-11-10 10:27:10,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 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) [2024-11-10 10:27:10,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:10,950 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:10,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:27:11,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:11,151 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:11,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 456791057, now seen corresponding path program 2 times [2024-11-10 10:27:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29396569] [2024-11-10 10:27:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:27:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29396569] [2024-11-10 10:27:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29396569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561628603] [2024-11-10 10:27:11,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:27:11,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:11,399 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) [2024-11-10 10:27:11,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:27:11,543 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 10:27:11,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:11,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:27:11,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-10 10:27:11,660 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:27:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561628603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:11,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:27:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-10 10:27:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344275058] [2024-11-10 10:27:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:11,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:27:11,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:11,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:11,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:11,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:11,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:11,784 INFO L124 PetriNetUnfolderBase]: 81/194 cut-off events. [2024-11-10 10:27:11,784 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-10 10:27:11,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 194 events. 81/194 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 608 event pairs, 24 based on Foata normal form. 5/180 useless extension candidates. Maximal degree in co-relation 398. Up to 99 conditions per place. [2024-11-10 10:27:11,786 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-11-10 10:27:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 52 transitions, 276 flow [2024-11-10 10:27:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-10 10:27:11,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2024-11-10 10:27:11,788 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 150 flow. Second operand 4 states and 77 transitions. [2024-11-10 10:27:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 52 transitions, 276 flow [2024-11-10 10:27:11,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 260 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:11,791 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 154 flow [2024-11-10 10:27:11,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-11-10 10:27:11,792 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-11-10 10:27:11,792 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 154 flow [2024-11-10 10:27:11,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:11,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:11,792 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:11,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:27:11,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-10 10:27:11,994 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:11,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:11,994 INFO L85 PathProgramCache]: Analyzing trace with hash -179755557, now seen corresponding path program 3 times [2024-11-10 10:27:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742468852] [2024-11-10 10:27:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:11,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:27:12,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742468852] [2024-11-10 10:27:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742468852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849353541] [2024-11-10 10:27:12,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:27:12,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:12,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:12,197 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) [2024-11-10 10:27:12,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:27:12,305 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-10 10:27:12,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:12,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:27:12,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-10 10:27:12,433 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:27:12,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849353541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:12,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:27:12,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-10 10:27:12,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215229961] [2024-11-10 10:27:12,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:12,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:27:12,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:12,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:12,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:12,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:12,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:12,603 INFO L124 PetriNetUnfolderBase]: 125/281 cut-off events. [2024-11-10 10:27:12,604 INFO L125 PetriNetUnfolderBase]: For 135/156 co-relation queries the response was YES. [2024-11-10 10:27:12,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 281 events. 125/281 cut-off events. For 135/156 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1072 event pairs, 54 based on Foata normal form. 14/265 useless extension candidates. Maximal degree in co-relation 634. Up to 155 conditions per place. [2024-11-10 10:27:12,607 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-10 10:27:12,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 290 flow [2024-11-10 10:27:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-10 10:27:12,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2024-11-10 10:27:12,609 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 154 flow. Second operand 4 states and 74 transitions. [2024-11-10 10:27:12,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 290 flow [2024-11-10 10:27:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:12,612 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 172 flow [2024-11-10 10:27:12,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-10 10:27:12,613 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-11-10 10:27:12,613 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 172 flow [2024-11-10 10:27:12,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:12,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:12,614 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:12,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:27:12,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:12,818 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:12,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash -215715057, now seen corresponding path program 4 times [2024-11-10 10:27:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:12,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783547417] [2024-11-10 10:27:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:27:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:12,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783547417] [2024-11-10 10:27:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783547417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:12,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530455225] [2024-11-10 10:27:12,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:27:12,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:12,980 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) [2024-11-10 10:27:12,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:27:13,084 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:27:13,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:13,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:27:13,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:27:13,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:27:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530455225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:13,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:13,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-10 10:27:13,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799012199] [2024-11-10 10:27:13,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:13,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:27:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:27:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:27:13,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:13,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:13,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:13,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:13,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:13,347 INFO L124 PetriNetUnfolderBase]: 93/248 cut-off events. [2024-11-10 10:27:13,348 INFO L125 PetriNetUnfolderBase]: For 208/224 co-relation queries the response was YES. [2024-11-10 10:27:13,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 248 events. 93/248 cut-off events. For 208/224 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 962 event pairs, 67 based on Foata normal form. 11/249 useless extension candidates. Maximal degree in co-relation 608. Up to 177 conditions per place. [2024-11-10 10:27:13,351 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 20 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-11-10 10:27:13,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 41 transitions, 248 flow [2024-11-10 10:27:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:27:13,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:27:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-11-10 10:27:13,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2024-11-10 10:27:13,355 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 172 flow. Second operand 7 states and 95 transitions. [2024-11-10 10:27:13,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 41 transitions, 248 flow [2024-11-10 10:27:13,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:13,359 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 218 flow [2024-11-10 10:27:13,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2024-11-10 10:27:13,360 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-11-10 10:27:13,361 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 218 flow [2024-11-10 10:27:13,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:13,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:13,362 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:13,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:27:13,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:13,567 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:13,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash 141504118, now seen corresponding path program 5 times [2024-11-10 10:27:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650123773] [2024-11-10 10:27:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:13,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650123773] [2024-11-10 10:27:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650123773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:13,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:13,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:27:13,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382988451] [2024-11-10 10:27:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:13,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:13,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:13,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:27:13,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:13,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:13,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:13,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:13,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:13,913 INFO L124 PetriNetUnfolderBase]: 139/327 cut-off events. [2024-11-10 10:27:13,913 INFO L125 PetriNetUnfolderBase]: For 309/333 co-relation queries the response was YES. [2024-11-10 10:27:13,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 327 events. 139/327 cut-off events. For 309/333 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1351 event pairs, 46 based on Foata normal form. 20/335 useless extension candidates. Maximal degree in co-relation 819. Up to 218 conditions per place. [2024-11-10 10:27:13,917 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 41 selfloop transitions, 5 changer transitions 1/56 dead transitions. [2024-11-10 10:27:13,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 364 flow [2024-11-10 10:27:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-10 10:27:13,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-11-10 10:27:13,920 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 218 flow. Second operand 4 states and 72 transitions. [2024-11-10 10:27:13,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 364 flow [2024-11-10 10:27:13,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 336 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-10 10:27:13,924 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 223 flow [2024-11-10 10:27:13,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-10 10:27:13,925 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-11-10 10:27:13,925 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 223 flow [2024-11-10 10:27:13,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:13,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:13,925 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:13,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:27:13,925 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:13,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash -756034116, now seen corresponding path program 6 times [2024-11-10 10:27:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:13,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006890901] [2024-11-10 10:27:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:13,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:14,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006890901] [2024-11-10 10:27:14,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006890901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:14,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:14,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:27:14,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887561823] [2024-11-10 10:27:14,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:14,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:14,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:14,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:14,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:27:14,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:14,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:14,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:14,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:14,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:14,243 INFO L124 PetriNetUnfolderBase]: 137/324 cut-off events. [2024-11-10 10:27:14,244 INFO L125 PetriNetUnfolderBase]: For 467/480 co-relation queries the response was YES. [2024-11-10 10:27:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 324 events. 137/324 cut-off events. For 467/480 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1312 event pairs, 33 based on Foata normal form. 13/316 useless extension candidates. Maximal degree in co-relation 876. Up to 187 conditions per place. [2024-11-10 10:27:14,248 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 40 selfloop transitions, 6 changer transitions 1/56 dead transitions. [2024-11-10 10:27:14,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 369 flow [2024-11-10 10:27:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-10 10:27:14,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2024-11-10 10:27:14,250 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 223 flow. Second operand 4 states and 70 transitions. [2024-11-10 10:27:14,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 369 flow [2024-11-10 10:27:14,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:14,256 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 258 flow [2024-11-10 10:27:14,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-11-10 10:27:14,257 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-11-10 10:27:14,258 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 258 flow [2024-11-10 10:27:14,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:14,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:14,259 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:14,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 10:27:14,259 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:14,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1794246243, now seen corresponding path program 1 times [2024-11-10 10:27:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:14,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963473659] [2024-11-10 10:27:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-10 10:27:14,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:14,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963473659] [2024-11-10 10:27:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963473659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:14,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:27:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112644533] [2024-11-10 10:27:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:14,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:27:14,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:14,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:14,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:14,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:14,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:14,626 INFO L124 PetriNetUnfolderBase]: 116/277 cut-off events. [2024-11-10 10:27:14,626 INFO L125 PetriNetUnfolderBase]: For 609/620 co-relation queries the response was YES. [2024-11-10 10:27:14,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 277 events. 116/277 cut-off events. For 609/620 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1026 event pairs, 48 based on Foata normal form. 11/269 useless extension candidates. Maximal degree in co-relation 815. Up to 170 conditions per place. [2024-11-10 10:27:14,629 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 41 selfloop transitions, 6 changer transitions 3/59 dead transitions. [2024-11-10 10:27:14,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 417 flow [2024-11-10 10:27:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-10 10:27:14,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2024-11-10 10:27:14,630 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 258 flow. Second operand 4 states and 74 transitions. [2024-11-10 10:27:14,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 417 flow [2024-11-10 10:27:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-10 10:27:14,633 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 281 flow [2024-11-10 10:27:14,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-10 10:27:14,634 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-11-10 10:27:14,634 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 281 flow [2024-11-10 10:27:14,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:14,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:14,634 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:14,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 10:27:14,635 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:14,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -726132665, now seen corresponding path program 1 times [2024-11-10 10:27:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012088372] [2024-11-10 10:27:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-10 10:27:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012088372] [2024-11-10 10:27:14,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012088372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:27:14,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:27:14,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:27:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850655446] [2024-11-10 10:27:14,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:27:14,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:27:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:27:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:27:14,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-10 10:27:14,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 281 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:14,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:14,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-10 10:27:14,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:15,020 INFO L124 PetriNetUnfolderBase]: 97/228 cut-off events. [2024-11-10 10:27:15,021 INFO L125 PetriNetUnfolderBase]: For 774/785 co-relation queries the response was YES. [2024-11-10 10:27:15,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 228 events. 97/228 cut-off events. For 774/785 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 736 event pairs, 33 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 740. Up to 145 conditions per place. [2024-11-10 10:27:15,023 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 7 changer transitions 2/59 dead transitions. [2024-11-10 10:27:15,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 447 flow [2024-11-10 10:27:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:27:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:27:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-10 10:27:15,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-11-10 10:27:15,025 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 281 flow. Second operand 4 states and 73 transitions. [2024-11-10 10:27:15,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 447 flow [2024-11-10 10:27:15,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-10 10:27:15,027 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 296 flow [2024-11-10 10:27:15,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-11-10 10:27:15,029 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-11-10 10:27:15,029 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 296 flow [2024-11-10 10:27:15,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:15,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:15,030 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:15,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:27:15,030 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:15,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:15,031 INFO L85 PathProgramCache]: Analyzing trace with hash -953234524, now seen corresponding path program 1 times [2024-11-10 10:27:15,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10029363] [2024-11-10 10:27:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:15,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10029363] [2024-11-10 10:27:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10029363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686640329] [2024-11-10 10:27:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:16,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:16,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:16,111 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) [2024-11-10 10:27:16,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:27:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:16,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:27:16,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:16,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:16,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-10 10:27:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:16,481 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:17,217 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-10 10:27:17,218 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 126 treesize of output 79 [2024-11-10 10:27:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686640329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:17,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:17,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-10 10:27:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834091518] [2024-11-10 10:27:17,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:17,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:17,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:17,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:17,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:17,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 296 flow. Second operand has 28 states, 28 states have (on average 10.857142857142858) internal successors, (304), 28 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:17,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:17,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:17,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:18,597 INFO L124 PetriNetUnfolderBase]: 241/501 cut-off events. [2024-11-10 10:27:18,598 INFO L125 PetriNetUnfolderBase]: For 1211/1215 co-relation queries the response was YES. [2024-11-10 10:27:18,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 501 events. 241/501 cut-off events. For 1211/1215 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2091 event pairs, 24 based on Foata normal form. 5/437 useless extension candidates. Maximal degree in co-relation 1512. Up to 162 conditions per place. [2024-11-10 10:27:18,602 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 73 selfloop transitions, 30 changer transitions 8/118 dead transitions. [2024-11-10 10:27:18,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 118 transitions, 812 flow [2024-11-10 10:27:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:27:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:27:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 245 transitions. [2024-11-10 10:27:18,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42387543252595156 [2024-11-10 10:27:18,604 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 296 flow. Second operand 17 states and 245 transitions. [2024-11-10 10:27:18,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 118 transitions, 812 flow [2024-11-10 10:27:18,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 768 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-10 10:27:18,608 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 512 flow [2024-11-10 10:27:18,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=512, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-10 10:27:18,609 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-11-10 10:27:18,609 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 512 flow [2024-11-10 10:27:18,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.857142857142858) internal successors, (304), 28 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:18,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:18,610 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:18,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:27:18,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-10 10:27:18,813 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:18,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:18,813 INFO L85 PathProgramCache]: Analyzing trace with hash 968053206, now seen corresponding path program 2 times [2024-11-10 10:27:18,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:18,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357226410] [2024-11-10 10:27:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-10 10:27:20,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:20,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357226410] [2024-11-10 10:27:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357226410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:20,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711847601] [2024-11-10 10:27:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:27:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:20,327 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) [2024-11-10 10:27:20,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:27:20,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:27:20,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:20,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:20,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:20,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:20,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-10 10:27:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:20,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:21,336 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:21,337 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 173 treesize of output 107 [2024-11-10 10:27:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:21,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711847601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:21,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:21,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 34 [2024-11-10 10:27:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099629913] [2024-11-10 10:27:21,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:21,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 10:27:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 10:27:21,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 10:27:21,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-10 10:27:21,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 512 flow. Second operand has 34 states, 34 states have (on average 8.794117647058824) internal successors, (299), 34 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:21,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:21,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-10 10:27:21,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:22,557 INFO L124 PetriNetUnfolderBase]: 264/545 cut-off events. [2024-11-10 10:27:22,557 INFO L125 PetriNetUnfolderBase]: For 2077/2081 co-relation queries the response was YES. [2024-11-10 10:27:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 545 events. 264/545 cut-off events. For 2077/2081 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2354 event pairs, 48 based on Foata normal form. 5/501 useless extension candidates. Maximal degree in co-relation 2128. Up to 356 conditions per place. [2024-11-10 10:27:22,562 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 58 selfloop transitions, 35 changer transitions 1/99 dead transitions. [2024-11-10 10:27:22,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 875 flow [2024-11-10 10:27:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:27:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:27:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 195 transitions. [2024-11-10 10:27:22,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31862745098039214 [2024-11-10 10:27:22,564 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 512 flow. Second operand 18 states and 195 transitions. [2024-11-10 10:27:22,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 875 flow [2024-11-10 10:27:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 99 transitions, 817 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-10 10:27:22,574 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 660 flow [2024-11-10 10:27:22,574 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=660, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2024-11-10 10:27:22,575 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-11-10 10:27:22,575 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 660 flow [2024-11-10 10:27:22,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.794117647058824) internal successors, (299), 34 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:22,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:22,575 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:22,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:27:22,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:22,776 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:22,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash -887864840, now seen corresponding path program 3 times [2024-11-10 10:27:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586881846] [2024-11-10 10:27:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:23,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586881846] [2024-11-10 10:27:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586881846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:23,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109403802] [2024-11-10 10:27:23,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:27:23,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:23,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:23,721 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) [2024-11-10 10:27:23,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:27:23,838 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:27:23,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:23,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:23,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:24,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:24,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-10 10:27:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:24,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:24,735 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:24,735 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 173 treesize of output 107 [2024-11-10 10:27:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109403802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:24,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-10 10:27:24,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281248892] [2024-11-10 10:27:24,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:24,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:24,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:24,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:24,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:24,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 660 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:24,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:24,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:24,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:25,811 INFO L124 PetriNetUnfolderBase]: 294/598 cut-off events. [2024-11-10 10:27:25,811 INFO L125 PetriNetUnfolderBase]: For 2844/2848 co-relation queries the response was YES. [2024-11-10 10:27:25,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 598 events. 294/598 cut-off events. For 2844/2848 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2660 event pairs, 45 based on Foata normal form. 5/581 useless extension candidates. Maximal degree in co-relation 2518. Up to 396 conditions per place. [2024-11-10 10:27:25,819 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 75 selfloop transitions, 27 changer transitions 2/111 dead transitions. [2024-11-10 10:27:25,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 1045 flow [2024-11-10 10:27:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:27:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:27:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 178 transitions. [2024-11-10 10:27:25,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40271493212669685 [2024-11-10 10:27:25,821 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 660 flow. Second operand 13 states and 178 transitions. [2024-11-10 10:27:25,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 1045 flow [2024-11-10 10:27:25,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 111 transitions, 970 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-10 10:27:25,829 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 762 flow [2024-11-10 10:27:25,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=762, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-11-10 10:27:25,830 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-11-10 10:27:25,831 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 762 flow [2024-11-10 10:27:25,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:25,831 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:25,831 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:25,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 10:27:26,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:26,032 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:26,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash -476919454, now seen corresponding path program 4 times [2024-11-10 10:27:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307077354] [2024-11-10 10:27:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:26,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307077354] [2024-11-10 10:27:26,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307077354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:26,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133425384] [2024-11-10 10:27:26,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:27:26,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:26,834 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) [2024-11-10 10:27:26,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 10:27:26,949 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:27:26,949 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:26,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:27:26,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:27,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:27,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-10 10:27:27,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:27,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:27,618 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:27,618 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 173 treesize of output 107 [2024-11-10 10:27:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:27,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133425384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:27,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:27,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-11-10 10:27:27,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932492541] [2024-11-10 10:27:27,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:27,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-10 10:27:27,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-10 10:27:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-11-10 10:27:27,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:27,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 762 flow. Second operand has 27 states, 27 states have (on average 10.74074074074074) internal successors, (290), 27 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:27,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:27,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:27,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:28,437 INFO L124 PetriNetUnfolderBase]: 309/631 cut-off events. [2024-11-10 10:27:28,437 INFO L125 PetriNetUnfolderBase]: For 3594/3598 co-relation queries the response was YES. [2024-11-10 10:27:28,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 631 events. 309/631 cut-off events. For 3594/3598 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2879 event pairs, 48 based on Foata normal form. 5/632 useless extension candidates. Maximal degree in co-relation 2895. Up to 421 conditions per place. [2024-11-10 10:27:28,443 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 74 selfloop transitions, 31 changer transitions 9/121 dead transitions. [2024-11-10 10:27:28,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 121 transitions, 1213 flow [2024-11-10 10:27:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 10:27:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 10:27:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 200 transitions. [2024-11-10 10:27:28,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39215686274509803 [2024-11-10 10:27:28,445 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 762 flow. Second operand 15 states and 200 transitions. [2024-11-10 10:27:28,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 121 transitions, 1213 flow [2024-11-10 10:27:28,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 1085 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-11-10 10:27:28,454 INFO L231 Difference]: Finished difference. Result has 109 places, 97 transitions, 845 flow [2024-11-10 10:27:28,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=845, PETRI_PLACES=109, PETRI_TRANSITIONS=97} [2024-11-10 10:27:28,455 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-11-10 10:27:28,455 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 97 transitions, 845 flow [2024-11-10 10:27:28,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.74074074074074) internal successors, (290), 27 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:28,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:28,456 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:28,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 10:27:28,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-10 10:27:28,657 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:28,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:28,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1056787448, now seen corresponding path program 5 times [2024-11-10 10:27:28,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842614171] [2024-11-10 10:27:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842614171] [2024-11-10 10:27:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842614171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495756084] [2024-11-10 10:27:29,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:27:29,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:29,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:29,416 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) [2024-11-10 10:27:29,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 10:27:29,578 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 10:27:29,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:29,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 10:27:29,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:29,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:29,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-10 10:27:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:29,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:30,302 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:30,303 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 234 treesize of output 135 [2024-11-10 10:27:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495756084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:30,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:30,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 28 [2024-11-10 10:27:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31627420] [2024-11-10 10:27:30,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:30,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:30,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:30,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:30,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 97 transitions, 845 flow. Second operand has 28 states, 28 states have (on average 11.071428571428571) internal successors, (310), 28 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:30,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:30,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:30,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:31,466 INFO L124 PetriNetUnfolderBase]: 309/637 cut-off events. [2024-11-10 10:27:31,466 INFO L125 PetriNetUnfolderBase]: For 4087/4091 co-relation queries the response was YES. [2024-11-10 10:27:31,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 637 events. 309/637 cut-off events. For 4087/4091 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2958 event pairs, 48 based on Foata normal form. 17/652 useless extension candidates. Maximal degree in co-relation 3011. Up to 400 conditions per place. [2024-11-10 10:27:31,472 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 74 selfloop transitions, 30 changer transitions 15/126 dead transitions. [2024-11-10 10:27:31,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 126 transitions, 1254 flow [2024-11-10 10:27:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:27:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:27:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2024-11-10 10:27:31,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39889705882352944 [2024-11-10 10:27:31,476 INFO L175 Difference]: Start difference. First operand has 109 places, 97 transitions, 845 flow. Second operand 16 states and 217 transitions. [2024-11-10 10:27:31,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 126 transitions, 1254 flow [2024-11-10 10:27:31,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 126 transitions, 1176 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-11-10 10:27:31,484 INFO L231 Difference]: Finished difference. Result has 113 places, 94 transitions, 831 flow [2024-11-10 10:27:31,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=831, PETRI_PLACES=113, PETRI_TRANSITIONS=94} [2024-11-10 10:27:31,485 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-11-10 10:27:31,485 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 94 transitions, 831 flow [2024-11-10 10:27:31,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.071428571428571) internal successors, (310), 28 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:31,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:31,486 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:31,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:31,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 10:27:31,686 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:31,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash -848662192, now seen corresponding path program 6 times [2024-11-10 10:27:31,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:31,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214181243] [2024-11-10 10:27:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:31,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:32,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214181243] [2024-11-10 10:27:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214181243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961909185] [2024-11-10 10:27:32,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:27:32,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:32,391 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) [2024-11-10 10:27:32,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 10:27:32,495 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:27:32,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:32,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:32,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:32,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:32,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-10 10:27:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:32,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:33,095 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:33,095 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 173 treesize of output 107 [2024-11-10 10:27:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961909185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:33,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:33,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-10 10:27:33,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602113718] [2024-11-10 10:27:33,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:33,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:33,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:33,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:33,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 94 transitions, 831 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:33,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:33,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:33,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:33,763 INFO L124 PetriNetUnfolderBase]: 304/616 cut-off events. [2024-11-10 10:27:33,763 INFO L125 PetriNetUnfolderBase]: For 4586/4590 co-relation queries the response was YES. [2024-11-10 10:27:33,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3075 conditions, 616 events. 304/616 cut-off events. For 4586/4590 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2788 event pairs, 46 based on Foata normal form. 5/619 useless extension candidates. Maximal degree in co-relation 3040. Up to 412 conditions per place. [2024-11-10 10:27:33,773 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 80 selfloop transitions, 29 changer transitions 9/125 dead transitions. [2024-11-10 10:27:33,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 125 transitions, 1277 flow [2024-11-10 10:27:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:27:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:27:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 190 transitions. [2024-11-10 10:27:33,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2024-11-10 10:27:33,774 INFO L175 Difference]: Start difference. First operand has 113 places, 94 transitions, 831 flow. Second operand 14 states and 190 transitions. [2024-11-10 10:27:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 125 transitions, 1277 flow [2024-11-10 10:27:33,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 125 transitions, 1165 flow, removed 35 selfloop flow, removed 15 redundant places. [2024-11-10 10:27:33,794 INFO L231 Difference]: Finished difference. Result has 112 places, 101 transitions, 887 flow [2024-11-10 10:27:33,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=101} [2024-11-10 10:27:33,794 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-11-10 10:27:33,795 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 101 transitions, 887 flow [2024-11-10 10:27:33,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:33,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:33,795 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:33,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 10:27:33,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 10:27:34,000 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:34,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1120562620, now seen corresponding path program 7 times [2024-11-10 10:27:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:34,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144375374] [2024-11-10 10:27:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:34,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144375374] [2024-11-10 10:27:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144375374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:34,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138675926] [2024-11-10 10:27:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:27:34,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:34,693 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) [2024-11-10 10:27:34,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 10:27:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:34,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:27:34,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:34,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:34,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-10 10:27:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:34,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:35,419 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:35,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-11-10 10:27:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138675926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:35,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:35,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-10 10:27:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165924793] [2024-11-10 10:27:35,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:35,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:35,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:35,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 101 transitions, 887 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:35,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:35,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:35,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:36,325 INFO L124 PetriNetUnfolderBase]: 313/632 cut-off events. [2024-11-10 10:27:36,325 INFO L125 PetriNetUnfolderBase]: For 4916/4920 co-relation queries the response was YES. [2024-11-10 10:27:36,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3188 conditions, 632 events. 313/632 cut-off events. For 4916/4920 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2900 event pairs, 47 based on Foata normal form. 10/638 useless extension candidates. Maximal degree in co-relation 3152. Up to 407 conditions per place. [2024-11-10 10:27:36,331 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 85 selfloop transitions, 33 changer transitions 8/133 dead transitions. [2024-11-10 10:27:36,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 133 transitions, 1383 flow [2024-11-10 10:27:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:27:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:27:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 217 transitions. [2024-11-10 10:27:36,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39889705882352944 [2024-11-10 10:27:36,333 INFO L175 Difference]: Start difference. First operand has 112 places, 101 transitions, 887 flow. Second operand 16 states and 217 transitions. [2024-11-10 10:27:36,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 133 transitions, 1383 flow [2024-11-10 10:27:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 133 transitions, 1332 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-11-10 10:27:36,349 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 993 flow [2024-11-10 10:27:36,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=993, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2024-11-10 10:27:36,350 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-11-10 10:27:36,350 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 993 flow [2024-11-10 10:27:36,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:36,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:36,351 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:36,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 10:27:36,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 10:27:36,552 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:36,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1987673500, now seen corresponding path program 8 times [2024-11-10 10:27:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:36,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822151267] [2024-11-10 10:27:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:36,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822151267] [2024-11-10 10:27:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822151267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:37,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084296080] [2024-11-10 10:27:37,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:27:37,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:37,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:37,443 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) [2024-11-10 10:27:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 10:27:37,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:27:37,556 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:37,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:37,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:37,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:37,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-10 10:27:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:37,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:38,167 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:38,168 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 173 treesize of output 107 [2024-11-10 10:27:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:38,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084296080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:38,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:38,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-10 10:27:38,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560538288] [2024-11-10 10:27:38,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:38,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:38,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:38,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 993 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:38,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:38,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:38,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:39,342 INFO L124 PetriNetUnfolderBase]: 389/788 cut-off events. [2024-11-10 10:27:39,342 INFO L125 PetriNetUnfolderBase]: For 8023/8027 co-relation queries the response was YES. [2024-11-10 10:27:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4349 conditions, 788 events. 389/788 cut-off events. For 8023/8027 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3910 event pairs, 107 based on Foata normal form. 15/799 useless extension candidates. Maximal degree in co-relation 4310. Up to 444 conditions per place. [2024-11-10 10:27:39,349 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 105 selfloop transitions, 29 changer transitions 17/158 dead transitions. [2024-11-10 10:27:39,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 158 transitions, 1789 flow [2024-11-10 10:27:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:27:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:27:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 226 transitions. [2024-11-10 10:27:39,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2024-11-10 10:27:39,350 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 993 flow. Second operand 16 states and 226 transitions. [2024-11-10 10:27:39,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 158 transitions, 1789 flow [2024-11-10 10:27:39,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 158 transitions, 1671 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-11-10 10:27:39,368 INFO L231 Difference]: Finished difference. Result has 128 places, 115 transitions, 1132 flow [2024-11-10 10:27:39,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1132, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2024-11-10 10:27:39,369 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-11-10 10:27:39,369 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 1132 flow [2024-11-10 10:27:39,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:39,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:39,370 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:39,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:39,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 10:27:39,571 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:39,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash -576262898, now seen corresponding path program 9 times [2024-11-10 10:27:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177456251] [2024-11-10 10:27:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:40,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:40,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177456251] [2024-11-10 10:27:40,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177456251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:40,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65968573] [2024-11-10 10:27:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:27:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:40,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:40,349 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) [2024-11-10 10:27:40,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 10:27:40,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:27:40,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:40,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:40,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:40,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:40,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-10 10:27:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:40,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:41,156 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-11-10 10:27:41,156 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 173 treesize of output 107 [2024-11-10 10:27:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:41,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65968573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:41,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:41,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 28 [2024-11-10 10:27:41,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020798377] [2024-11-10 10:27:41,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:41,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:41,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:41,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:41,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:41,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 1132 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:41,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:41,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:41,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:42,059 INFO L124 PetriNetUnfolderBase]: 397/809 cut-off events. [2024-11-10 10:27:42,059 INFO L125 PetriNetUnfolderBase]: For 9597/9605 co-relation queries the response was YES. [2024-11-10 10:27:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4585 conditions, 809 events. 397/809 cut-off events. For 9597/9605 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4111 event pairs, 126 based on Foata normal form. 15/820 useless extension candidates. Maximal degree in co-relation 4543. Up to 542 conditions per place. [2024-11-10 10:27:42,067 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 103 selfloop transitions, 28 changer transitions 11/149 dead transitions. [2024-11-10 10:27:42,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 149 transitions, 1729 flow [2024-11-10 10:27:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:27:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:27:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 192 transitions. [2024-11-10 10:27:42,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40336134453781514 [2024-11-10 10:27:42,069 INFO L175 Difference]: Start difference. First operand has 128 places, 115 transitions, 1132 flow. Second operand 14 states and 192 transitions. [2024-11-10 10:27:42,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 149 transitions, 1729 flow [2024-11-10 10:27:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 149 transitions, 1646 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-11-10 10:27:42,084 INFO L231 Difference]: Finished difference. Result has 134 places, 121 transitions, 1232 flow [2024-11-10 10:27:42,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1232, PETRI_PLACES=134, PETRI_TRANSITIONS=121} [2024-11-10 10:27:42,085 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-11-10 10:27:42,085 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 121 transitions, 1232 flow [2024-11-10 10:27:42,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:42,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:42,086 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:42,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 10:27:42,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:42,287 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:42,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1369342876, now seen corresponding path program 10 times [2024-11-10 10:27:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:42,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101368544] [2024-11-10 10:27:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:43,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101368544] [2024-11-10 10:27:43,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101368544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:43,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031112188] [2024-11-10 10:27:43,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:27:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:43,062 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) [2024-11-10 10:27:43,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 10:27:43,197 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:27:43,197 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:43,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:27:43,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:43,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:43,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-10 10:27:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:43,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:43,882 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-10 10:27:43,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-11-10 10:27:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:43,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031112188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:43,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:43,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-10 10:27:43,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550976095] [2024-11-10 10:27:43,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:43,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 10:27:43,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 10:27:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-10 10:27:43,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:43,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 121 transitions, 1232 flow. Second operand has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:43,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:43,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:43,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:45,172 INFO L124 PetriNetUnfolderBase]: 476/973 cut-off events. [2024-11-10 10:27:45,172 INFO L125 PetriNetUnfolderBase]: For 13472/13480 co-relation queries the response was YES. [2024-11-10 10:27:45,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 973 events. 476/973 cut-off events. For 13472/13480 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5230 event pairs, 82 based on Foata normal form. 4/973 useless extension candidates. Maximal degree in co-relation 5679. Up to 314 conditions per place. [2024-11-10 10:27:45,183 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 110 selfloop transitions, 54 changer transitions 11/182 dead transitions. [2024-11-10 10:27:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 2232 flow [2024-11-10 10:27:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 10:27:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-10 10:27:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 248 transitions. [2024-11-10 10:27:45,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40522875816993464 [2024-11-10 10:27:45,185 INFO L175 Difference]: Start difference. First operand has 134 places, 121 transitions, 1232 flow. Second operand 18 states and 248 transitions. [2024-11-10 10:27:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 2232 flow [2024-11-10 10:27:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 182 transitions, 2135 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-11-10 10:27:45,237 INFO L231 Difference]: Finished difference. Result has 145 places, 135 transitions, 1554 flow [2024-11-10 10:27:45,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1554, PETRI_PLACES=145, PETRI_TRANSITIONS=135} [2024-11-10 10:27:45,240 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-11-10 10:27:45,240 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 135 transitions, 1554 flow [2024-11-10 10:27:45,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.785714285714286) internal successors, (302), 28 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:45,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:45,241 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:45,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:45,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:45,442 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:45,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1701304691, now seen corresponding path program 11 times [2024-11-10 10:27:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:45,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452077862] [2024-11-10 10:27:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:45,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:46,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452077862] [2024-11-10 10:27:46,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452077862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569783620] [2024-11-10 10:27:46,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:27:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:46,028 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) [2024-11-10 10:27:46,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 10:27:46,202 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 10:27:46,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:46,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 10:27:46,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:46,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:46,510 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-10 10:27:46,511 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 32 treesize of output 48 [2024-11-10 10:27:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569783620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:46,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:46,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-11-10 10:27:46,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085363046] [2024-11-10 10:27:46,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:46,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:27:46,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:46,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:27:46,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:27:46,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:46,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 135 transitions, 1554 flow. Second operand has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:46,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:46,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:46,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:46,962 INFO L124 PetriNetUnfolderBase]: 487/998 cut-off events. [2024-11-10 10:27:46,963 INFO L125 PetriNetUnfolderBase]: For 14917/14925 co-relation queries the response was YES. [2024-11-10 10:27:46,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5967 conditions, 998 events. 487/998 cut-off events. For 14917/14925 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5432 event pairs, 67 based on Foata normal form. 15/1009 useless extension candidates. Maximal degree in co-relation 5921. Up to 357 conditions per place. [2024-11-10 10:27:46,975 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 120 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-11-10 10:27:46,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 170 transitions, 2289 flow [2024-11-10 10:27:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 10:27:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 10:27:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-11-10 10:27:46,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2024-11-10 10:27:46,976 INFO L175 Difference]: Start difference. First operand has 145 places, 135 transitions, 1554 flow. Second operand 10 states and 152 transitions. [2024-11-10 10:27:46,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 170 transitions, 2289 flow [2024-11-10 10:27:47,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 170 transitions, 2074 flow, removed 78 selfloop flow, removed 10 redundant places. [2024-11-10 10:27:47,008 INFO L231 Difference]: Finished difference. Result has 145 places, 137 transitions, 1508 flow [2024-11-10 10:27:47,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1508, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2024-11-10 10:27:47,008 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-11-10 10:27:47,009 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 1508 flow [2024-11-10 10:27:47,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:47,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:47,009 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:47,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-10 10:27:47,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:47,210 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:47,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2062603765, now seen corresponding path program 12 times [2024-11-10 10:27:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:47,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026028596] [2024-11-10 10:27:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026028596] [2024-11-10 10:27:47,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026028596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:47,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514959488] [2024-11-10 10:27:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:27:47,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:47,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:47,830 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) [2024-11-10 10:27:47,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 10:27:48,398 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-10 10:27:48,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:48,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:48,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:48,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:48,783 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-10 10:27:48,784 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 32 treesize of output 48 [2024-11-10 10:27:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514959488] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:48,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-10 10:27:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090039181] [2024-11-10 10:27:48,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:48,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:27:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:27:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:27:48,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:48,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 1508 flow. Second operand has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:48,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:48,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:48,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:49,414 INFO L124 PetriNetUnfolderBase]: 527/1077 cut-off events. [2024-11-10 10:27:49,414 INFO L125 PetriNetUnfolderBase]: For 13995/14003 co-relation queries the response was YES. [2024-11-10 10:27:49,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6218 conditions, 1077 events. 527/1077 cut-off events. For 13995/14003 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6059 event pairs, 63 based on Foata normal form. 15/1081 useless extension candidates. Maximal degree in co-relation 6172. Up to 374 conditions per place. [2024-11-10 10:27:49,426 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 124 selfloop transitions, 51 changer transitions 0/182 dead transitions. [2024-11-10 10:27:49,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 182 transitions, 2335 flow [2024-11-10 10:27:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:27:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:27:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-11-10 10:27:49,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2024-11-10 10:27:49,428 INFO L175 Difference]: Start difference. First operand has 145 places, 137 transitions, 1508 flow. Second operand 12 states and 182 transitions. [2024-11-10 10:27:49,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 182 transitions, 2335 flow [2024-11-10 10:27:49,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 182 transitions, 2242 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-10 10:27:49,458 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 1633 flow [2024-11-10 10:27:49,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1431, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1633, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2024-11-10 10:27:49,458 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-11-10 10:27:49,459 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 1633 flow [2024-11-10 10:27:49,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:49,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:49,459 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:49,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 10:27:49,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-10 10:27:49,660 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:49,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 9999257, now seen corresponding path program 13 times [2024-11-10 10:27:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858837631] [2024-11-10 10:27:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:50,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858837631] [2024-11-10 10:27:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858837631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:50,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506746751] [2024-11-10 10:27:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:27:50,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:50,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:50,310 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) [2024-11-10 10:27:50,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 10:27:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:50,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 10:27:50,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:50,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:50,557 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 46 treesize of output 34 [2024-11-10 10:27:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:50,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:50,737 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-10 10:27:50,738 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 32 treesize of output 48 [2024-11-10 10:27:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506746751] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:50,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:50,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-10 10:27:50,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797467694] [2024-11-10 10:27:50,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:50,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:27:50,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:27:50,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:27:50,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:50,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 1633 flow. Second operand has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 18 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) [2024-11-10 10:27:50,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:50,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:50,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:51,288 INFO L124 PetriNetUnfolderBase]: 551/1133 cut-off events. [2024-11-10 10:27:51,288 INFO L125 PetriNetUnfolderBase]: For 15486/15494 co-relation queries the response was YES. [2024-11-10 10:27:51,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6744 conditions, 1133 events. 551/1133 cut-off events. For 15486/15494 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6489 event pairs, 51 based on Foata normal form. 19/1141 useless extension candidates. Maximal degree in co-relation 6695. Up to 351 conditions per place. [2024-11-10 10:27:51,299 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 121 selfloop transitions, 59 changer transitions 0/187 dead transitions. [2024-11-10 10:27:51,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 187 transitions, 2474 flow [2024-11-10 10:27:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:27:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:27:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-11-10 10:27:51,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4457013574660634 [2024-11-10 10:27:51,301 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 1633 flow. Second operand 13 states and 197 transitions. [2024-11-10 10:27:51,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 187 transitions, 2474 flow [2024-11-10 10:27:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 187 transitions, 2361 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-10 10:27:51,336 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 1744 flow [2024-11-10 10:27:51,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1744, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2024-11-10 10:27:51,337 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-11-10 10:27:51,337 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 1744 flow [2024-11-10 10:27:51,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 18 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) [2024-11-10 10:27:51,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:51,338 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:51,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:51,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:51,542 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:51,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:51,543 INFO L85 PathProgramCache]: Analyzing trace with hash 854424597, now seen corresponding path program 14 times [2024-11-10 10:27:51,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:51,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811085192] [2024-11-10 10:27:51,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:51,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811085192] [2024-11-10 10:27:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811085192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:52,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845333348] [2024-11-10 10:27:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:27:52,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:52,130 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) [2024-11-10 10:27:52,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 10:27:52,286 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:27:52,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:52,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:27:52,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:52,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:52,503 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 65 treesize of output 41 [2024-11-10 10:27:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:52,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:52,748 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:27:52,748 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 44 treesize of output 77 [2024-11-10 10:27:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845333348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:52,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:52,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-10 10:27:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75621784] [2024-11-10 10:27:52,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:52,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:27:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:27:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:27:52,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:52,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 1744 flow. Second operand has 20 states, 20 states have (on average 11.3) internal successors, (226), 20 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:52,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:52,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:52,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:53,567 INFO L124 PetriNetUnfolderBase]: 601/1235 cut-off events. [2024-11-10 10:27:53,567 INFO L125 PetriNetUnfolderBase]: For 18298/18306 co-relation queries the response was YES. [2024-11-10 10:27:53,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1235 events. 601/1235 cut-off events. For 18298/18306 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7097 event pairs, 235 based on Foata normal form. 15/1244 useless extension candidates. Maximal degree in co-relation 7505. Up to 824 conditions per place. [2024-11-10 10:27:53,577 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 150 selfloop transitions, 36 changer transitions 0/193 dead transitions. [2024-11-10 10:27:53,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 193 transitions, 2546 flow [2024-11-10 10:27:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:27:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:27:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2024-11-10 10:27:53,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4411764705882353 [2024-11-10 10:27:53,578 INFO L175 Difference]: Start difference. First operand has 158 places, 144 transitions, 1744 flow. Second operand 14 states and 210 transitions. [2024-11-10 10:27:53,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 193 transitions, 2546 flow [2024-11-10 10:27:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 193 transitions, 2404 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-11-10 10:27:53,604 INFO L231 Difference]: Finished difference. Result has 163 places, 147 transitions, 1805 flow [2024-11-10 10:27:53,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1805, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2024-11-10 10:27:53,604 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-11-10 10:27:53,604 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 1805 flow [2024-11-10 10:27:53,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.3) internal successors, (226), 20 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:53,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:53,605 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:53,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:53,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:53,805 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:53,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1639802991, now seen corresponding path program 15 times [2024-11-10 10:27:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591625253] [2024-11-10 10:27:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591625253] [2024-11-10 10:27:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591625253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499470539] [2024-11-10 10:27:54,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:27:54,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:54,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:54,402 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) [2024-11-10 10:27:54,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 10:27:54,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:27:54,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:54,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-10 10:27:54,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:54,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:54,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-11-10 10:27:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:54,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:55,053 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:27:55,054 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 71 treesize of output 88 [2024-11-10 10:27:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:55,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499470539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:55,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:55,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2024-11-10 10:27:55,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201323357] [2024-11-10 10:27:55,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:55,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:27:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:27:55,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:27:55,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:55,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 1805 flow. Second operand has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:55,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:55,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:55,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:56,069 INFO L124 PetriNetUnfolderBase]: 684/1445 cut-off events. [2024-11-10 10:27:56,069 INFO L125 PetriNetUnfolderBase]: For 24215/24223 co-relation queries the response was YES. [2024-11-10 10:27:56,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 1445 events. 684/1445 cut-off events. For 24215/24223 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8755 event pairs, 282 based on Foata normal form. 27/1466 useless extension candidates. Maximal degree in co-relation 8700. Up to 935 conditions per place. [2024-11-10 10:27:56,080 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 156 selfloop transitions, 45 changer transitions 0/208 dead transitions. [2024-11-10 10:27:56,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 208 transitions, 2841 flow [2024-11-10 10:27:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:27:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:27:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 256 transitions. [2024-11-10 10:27:56,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4429065743944637 [2024-11-10 10:27:56,082 INFO L175 Difference]: Start difference. First operand has 163 places, 147 transitions, 1805 flow. Second operand 17 states and 256 transitions. [2024-11-10 10:27:56,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 208 transitions, 2841 flow [2024-11-10 10:27:56,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 208 transitions, 2694 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-11-10 10:27:56,115 INFO L231 Difference]: Finished difference. Result has 177 places, 157 transitions, 2010 flow [2024-11-10 10:27:56,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2010, PETRI_PLACES=177, PETRI_TRANSITIONS=157} [2024-11-10 10:27:56,116 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-11-10 10:27:56,116 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 157 transitions, 2010 flow [2024-11-10 10:27:56,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:56,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:56,116 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:56,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:56,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:56,317 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:56,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1063896367, now seen corresponding path program 16 times [2024-11-10 10:27:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808694542] [2024-11-10 10:27:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-10 10:27:57,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:57,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808694542] [2024-11-10 10:27:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808694542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:57,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386460769] [2024-11-10 10:27:57,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:27:57,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:57,220 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) [2024-11-10 10:27:57,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 10:27:57,356 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:27:57,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:57,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 10:27:57,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:57,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:57,578 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:27:57,578 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 44 treesize of output 77 [2024-11-10 10:27:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386460769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:57,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:57,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2024-11-10 10:27:57,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564796722] [2024-11-10 10:27:57,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:57,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 10:27:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 10:27:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-10 10:27:57,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-10 10:27:57,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 157 transitions, 2010 flow. Second operand has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:57,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:57,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-10 10:27:57,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:27:58,147 INFO L124 PetriNetUnfolderBase]: 648/1352 cut-off events. [2024-11-10 10:27:58,148 INFO L125 PetriNetUnfolderBase]: For 21659/21667 co-relation queries the response was YES. [2024-11-10 10:27:58,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8478 conditions, 1352 events. 648/1352 cut-off events. For 21659/21667 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8038 event pairs, 306 based on Foata normal form. 15/1362 useless extension candidates. Maximal degree in co-relation 8419. Up to 1030 conditions per place. [2024-11-10 10:27:58,164 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 129 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-11-10 10:27:58,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 173 transitions, 2511 flow [2024-11-10 10:27:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:27:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:27:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-11-10 10:27:58,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32983193277310924 [2024-11-10 10:27:58,166 INFO L175 Difference]: Start difference. First operand has 177 places, 157 transitions, 2010 flow. Second operand 14 states and 157 transitions. [2024-11-10 10:27:58,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 173 transitions, 2511 flow [2024-11-10 10:27:58,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 173 transitions, 2353 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-11-10 10:27:58,221 INFO L231 Difference]: Finished difference. Result has 179 places, 155 transitions, 1925 flow [2024-11-10 10:27:58,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1925, PETRI_PLACES=179, PETRI_TRANSITIONS=155} [2024-11-10 10:27:58,222 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-11-10 10:27:58,222 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 155 transitions, 1925 flow [2024-11-10 10:27:58,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:58,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:27:58,223 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:27:58,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-10 10:27:58,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-10 10:27:58,424 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:27:58,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:27:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 206545829, now seen corresponding path program 17 times [2024-11-10 10:27:58,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:27:58,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063662381] [2024-11-10 10:27:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:27:58,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:27:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:27:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:27:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063662381] [2024-11-10 10:27:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063662381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:27:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038088442] [2024-11-10 10:27:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:27:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:27:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:27:59,031 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) [2024-11-10 10:27:59,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 10:27:59,296 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 10:27:59,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:27:59,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 10:27:59,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:27:59,483 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:27:59,483 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 46 treesize of output 30 [2024-11-10 10:27:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:59,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:27:59,677 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:27:59,677 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 71 treesize of output 88 [2024-11-10 10:27:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:27:59,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038088442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:27:59,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:27:59,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-10 10:27:59,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050849524] [2024-11-10 10:27:59,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:27:59,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:27:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:27:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:27:59,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:27:59,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:27:59,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 155 transitions, 1925 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:27:59,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:27:59,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:27:59,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:00,317 INFO L124 PetriNetUnfolderBase]: 644/1344 cut-off events. [2024-11-10 10:28:00,317 INFO L125 PetriNetUnfolderBase]: For 19039/19047 co-relation queries the response was YES. [2024-11-10 10:28:00,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 1344 events. 644/1344 cut-off events. For 19039/19047 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8025 event pairs, 270 based on Foata normal form. 12/1344 useless extension candidates. Maximal degree in co-relation 8133. Up to 949 conditions per place. [2024-11-10 10:28:00,330 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 132 selfloop transitions, 35 changer transitions 3/177 dead transitions. [2024-11-10 10:28:00,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 177 transitions, 2437 flow [2024-11-10 10:28:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:28:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:28:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 169 transitions. [2024-11-10 10:28:00,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41421568627450983 [2024-11-10 10:28:00,331 INFO L175 Difference]: Start difference. First operand has 179 places, 155 transitions, 1925 flow. Second operand 12 states and 169 transitions. [2024-11-10 10:28:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 177 transitions, 2437 flow [2024-11-10 10:28:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 177 transitions, 2360 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-11-10 10:28:00,384 INFO L231 Difference]: Finished difference. Result has 178 places, 151 transitions, 1874 flow [2024-11-10 10:28:00,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1874, PETRI_PLACES=178, PETRI_TRANSITIONS=151} [2024-11-10 10:28:00,385 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-11-10 10:28:00,385 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 1874 flow [2024-11-10 10:28:00,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:00,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:00,386 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:00,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-10 10:28:00,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-10 10:28:00,586 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:00,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:00,587 INFO L85 PathProgramCache]: Analyzing trace with hash 368623027, now seen corresponding path program 18 times [2024-11-10 10:28:00,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:00,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650658593] [2024-11-10 10:28:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:00,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:01,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:01,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650658593] [2024-11-10 10:28:01,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650658593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:01,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135871370] [2024-11-10 10:28:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:28:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:01,180 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) [2024-11-10 10:28:01,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 10:28:01,331 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-10 10:28:01,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:01,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:28:01,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:01,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:01,711 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:01,711 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 71 treesize of output 88 [2024-11-10 10:28:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:01,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135871370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:01,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:01,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-10 10:28:01,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565779329] [2024-11-10 10:28:01,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:01,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:28:01,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:01,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:28:01,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:28:01,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:01,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 151 transitions, 1874 flow. Second operand has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:01,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:01,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:01,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:02,251 INFO L124 PetriNetUnfolderBase]: 610/1268 cut-off events. [2024-11-10 10:28:02,252 INFO L125 PetriNetUnfolderBase]: For 18716/18724 co-relation queries the response was YES. [2024-11-10 10:28:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7832 conditions, 1268 events. 610/1268 cut-off events. For 18716/18724 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7473 event pairs, 280 based on Foata normal form. 14/1272 useless extension candidates. Maximal degree in co-relation 7774. Up to 964 conditions per place. [2024-11-10 10:28:02,262 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 123 selfloop transitions, 26 changer transitions 7/163 dead transitions. [2024-11-10 10:28:02,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 163 transitions, 2274 flow [2024-11-10 10:28:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 10:28:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 10:28:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-11-10 10:28:02,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2024-11-10 10:28:02,264 INFO L175 Difference]: Start difference. First operand has 178 places, 151 transitions, 1874 flow. Second operand 10 states and 137 transitions. [2024-11-10 10:28:02,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 163 transitions, 2274 flow [2024-11-10 10:28:02,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 163 transitions, 2175 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-11-10 10:28:02,313 INFO L231 Difference]: Finished difference. Result has 172 places, 143 transitions, 1729 flow [2024-11-10 10:28:02,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1729, PETRI_PLACES=172, PETRI_TRANSITIONS=143} [2024-11-10 10:28:02,318 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-10 10:28:02,318 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 143 transitions, 1729 flow [2024-11-10 10:28:02,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:02,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:02,319 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:02,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-10 10:28:02,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-10 10:28:02,520 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:02,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash 997872655, now seen corresponding path program 19 times [2024-11-10 10:28:02,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:02,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961462997] [2024-11-10 10:28:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:02,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:03,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:03,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961462997] [2024-11-10 10:28:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961462997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:03,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570515419] [2024-11-10 10:28:03,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:28:03,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:03,205 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) [2024-11-10 10:28:03,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 10:28:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:03,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 10:28:03,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:03,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:28:03,550 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 46 treesize of output 34 [2024-11-10 10:28:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:03,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:03,802 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-10 10:28:03,802 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 63 treesize of output 67 [2024-11-10 10:28:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:03,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570515419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:03,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:03,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-11-10 10:28:03,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439964233] [2024-11-10 10:28:03,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:03,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:28:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:28:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:28:03,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:03,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 143 transitions, 1729 flow. Second operand has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:03,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:03,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:03,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:04,339 INFO L124 PetriNetUnfolderBase]: 629/1309 cut-off events. [2024-11-10 10:28:04,339 INFO L125 PetriNetUnfolderBase]: For 19784/19792 co-relation queries the response was YES. [2024-11-10 10:28:04,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8015 conditions, 1309 events. 629/1309 cut-off events. For 19784/19792 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7725 event pairs, 204 based on Foata normal form. 14/1319 useless extension candidates. Maximal degree in co-relation 7958. Up to 642 conditions per place. [2024-11-10 10:28:04,349 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 126 selfloop transitions, 41 changer transitions 0/174 dead transitions. [2024-11-10 10:28:04,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 174 transitions, 2371 flow [2024-11-10 10:28:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:28:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:28:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-11-10 10:28:04,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-10 10:28:04,350 INFO L175 Difference]: Start difference. First operand has 172 places, 143 transitions, 1729 flow. Second operand 9 states and 144 transitions. [2024-11-10 10:28:04,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 174 transitions, 2371 flow [2024-11-10 10:28:04,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 174 transitions, 2283 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-11-10 10:28:04,383 INFO L231 Difference]: Finished difference. Result has 165 places, 144 transitions, 1752 flow [2024-11-10 10:28:04,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1752, PETRI_PLACES=165, PETRI_TRANSITIONS=144} [2024-11-10 10:28:04,384 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-11-10 10:28:04,384 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 144 transitions, 1752 flow [2024-11-10 10:28:04,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.333333333333334) internal successors, (204), 18 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:04,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:04,384 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:04,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-10 10:28:04,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:04,587 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:04,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1201533991, now seen corresponding path program 20 times [2024-11-10 10:28:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973831130] [2024-11-10 10:28:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:05,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973831130] [2024-11-10 10:28:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973831130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:05,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976339254] [2024-11-10 10:28:05,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:28:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:05,220 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) [2024-11-10 10:28:05,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 10:28:05,372 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:28:05,372 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:05,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:28:05,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:05,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:05,783 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-10 10:28:05,783 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 63 treesize of output 67 [2024-11-10 10:28:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:05,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976339254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:05,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:05,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-10 10:28:05,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882907103] [2024-11-10 10:28:05,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:05,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:28:05,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:05,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:28:05,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:28:05,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:05,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 144 transitions, 1752 flow. Second operand has 21 states, 21 states have (on average 11.285714285714286) internal successors, (237), 21 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:05,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:05,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:05,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:06,371 INFO L124 PetriNetUnfolderBase]: 634/1327 cut-off events. [2024-11-10 10:28:06,372 INFO L125 PetriNetUnfolderBase]: For 19302/19310 co-relation queries the response was YES. [2024-11-10 10:28:06,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8043 conditions, 1327 events. 634/1327 cut-off events. For 19302/19310 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7905 event pairs, 206 based on Foata normal form. 13/1338 useless extension candidates. Maximal degree in co-relation 7987. Up to 642 conditions per place. [2024-11-10 10:28:06,388 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 117 selfloop transitions, 42 changer transitions 12/178 dead transitions. [2024-11-10 10:28:06,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 2431 flow [2024-11-10 10:28:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:28:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:28:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-11-10 10:28:06,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2024-11-10 10:28:06,390 INFO L175 Difference]: Start difference. First operand has 165 places, 144 transitions, 1752 flow. Second operand 9 states and 137 transitions. [2024-11-10 10:28:06,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 2431 flow [2024-11-10 10:28:06,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 178 transitions, 2372 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-10 10:28:06,430 INFO L231 Difference]: Finished difference. Result has 169 places, 143 transitions, 1770 flow [2024-11-10 10:28:06,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=169, PETRI_TRANSITIONS=143} [2024-11-10 10:28:06,431 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-11-10 10:28:06,431 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 143 transitions, 1770 flow [2024-11-10 10:28:06,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.285714285714286) internal successors, (237), 21 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:06,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:06,431 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:06,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-10 10:28:06,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:06,632 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:06,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1216925205, now seen corresponding path program 21 times [2024-11-10 10:28:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692357139] [2024-11-10 10:28:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692357139] [2024-11-10 10:28:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692357139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694724761] [2024-11-10 10:28:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:28:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:07,287 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) [2024-11-10 10:28:07,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-10 10:28:07,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:28:07,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:07,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:28:07,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:07,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:07,818 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-10 10:28:07,818 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 63 treesize of output 67 [2024-11-10 10:28:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694724761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:07,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:07,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-10 10:28:07,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472774375] [2024-11-10 10:28:07,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:07,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:28:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:28:07,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:28:07,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:07,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 143 transitions, 1770 flow. Second operand has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:07,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:07,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:07,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:08,750 INFO L124 PetriNetUnfolderBase]: 624/1304 cut-off events. [2024-11-10 10:28:08,750 INFO L125 PetriNetUnfolderBase]: For 19566/19574 co-relation queries the response was YES. [2024-11-10 10:28:08,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 1304 events. 624/1304 cut-off events. For 19566/19574 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7725 event pairs, 202 based on Foata normal form. 13/1313 useless extension candidates. Maximal degree in co-relation 7952. Up to 642 conditions per place. [2024-11-10 10:28:08,761 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 114 selfloop transitions, 45 changer transitions 12/178 dead transitions. [2024-11-10 10:28:08,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 178 transitions, 2439 flow [2024-11-10 10:28:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 10:28:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 10:28:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-11-10 10:28:08,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4304812834224599 [2024-11-10 10:28:08,762 INFO L175 Difference]: Start difference. First operand has 169 places, 143 transitions, 1770 flow. Second operand 11 states and 161 transitions. [2024-11-10 10:28:08,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 178 transitions, 2439 flow [2024-11-10 10:28:08,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 178 transitions, 2358 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-10 10:28:08,792 INFO L231 Difference]: Finished difference. Result has 171 places, 141 transitions, 1763 flow [2024-11-10 10:28:08,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1763, PETRI_PLACES=171, PETRI_TRANSITIONS=141} [2024-11-10 10:28:08,793 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-11-10 10:28:08,793 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 141 transitions, 1763 flow [2024-11-10 10:28:08,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.19047619047619) internal successors, (235), 21 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:08,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:08,794 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:08,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-10 10:28:08,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-10 10:28:08,995 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:08,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1791680843, now seen corresponding path program 22 times [2024-11-10 10:28:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244447080] [2024-11-10 10:28:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:09,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244447080] [2024-11-10 10:28:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244447080] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358031701] [2024-11-10 10:28:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:28:09,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:09,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:09,742 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) [2024-11-10 10:28:09,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-10 10:28:09,925 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:28:09,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:09,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:28:09,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:10,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:28:10,062 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 46 treesize of output 34 [2024-11-10 10:28:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:10,167 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:10,410 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-11-10 10:28:10,411 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 63 treesize of output 67 [2024-11-10 10:28:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358031701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:10,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:10,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 24 [2024-11-10 10:28:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844947834] [2024-11-10 10:28:10,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:10,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 10:28:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 10:28:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-11-10 10:28:10,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:10,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 141 transitions, 1763 flow. Second operand has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:10,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:10,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:10,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:11,098 INFO L124 PetriNetUnfolderBase]: 599/1253 cut-off events. [2024-11-10 10:28:11,098 INFO L125 PetriNetUnfolderBase]: For 18602/18610 co-relation queries the response was YES. [2024-11-10 10:28:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 1253 events. 599/1253 cut-off events. For 18602/18610 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7267 event pairs, 103 based on Foata normal form. 13/1264 useless extension candidates. Maximal degree in co-relation 7689. Up to 632 conditions per place. [2024-11-10 10:28:11,108 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 118 selfloop transitions, 42 changer transitions 4/171 dead transitions. [2024-11-10 10:28:11,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 171 transitions, 2371 flow [2024-11-10 10:28:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:28:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:28:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 176 transitions. [2024-11-10 10:28:11,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2024-11-10 10:28:11,109 INFO L175 Difference]: Start difference. First operand has 171 places, 141 transitions, 1763 flow. Second operand 12 states and 176 transitions. [2024-11-10 10:28:11,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 171 transitions, 2371 flow [2024-11-10 10:28:11,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 171 transitions, 2287 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-10 10:28:11,140 INFO L231 Difference]: Finished difference. Result has 173 places, 140 transitions, 1767 flow [2024-11-10 10:28:11,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1767, PETRI_PLACES=173, PETRI_TRANSITIONS=140} [2024-11-10 10:28:11,141 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-11-10 10:28:11,141 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 140 transitions, 1767 flow [2024-11-10 10:28:11,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.041666666666666) internal successors, (265), 24 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:11,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:11,142 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:11,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-10 10:28:11,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-10 10:28:11,342 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:11,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1919456027, now seen corresponding path program 23 times [2024-11-10 10:28:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:11,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346543306] [2024-11-10 10:28:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:11,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-10 10:28:12,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346543306] [2024-11-10 10:28:12,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346543306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:12,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067617583] [2024-11-10 10:28:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:28:12,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:12,507 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) [2024-11-10 10:28:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-10 10:28:12,787 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 10:28:12,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:12,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 10:28:12,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:12,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:28:12,960 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 65 treesize of output 45 [2024-11-10 10:28:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:13,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:13,141 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:13,142 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 71 treesize of output 88 [2024-11-10 10:28:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067617583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:13,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:13,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 29 [2024-11-10 10:28:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988569968] [2024-11-10 10:28:13,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:13,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-10 10:28:13,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-10 10:28:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-10 10:28:13,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-10 10:28:13,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 140 transitions, 1767 flow. Second operand has 29 states, 29 states have (on average 9.206896551724139) internal successors, (267), 29 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:13,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:13,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-10 10:28:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:13,910 INFO L124 PetriNetUnfolderBase]: 621/1290 cut-off events. [2024-11-10 10:28:13,911 INFO L125 PetriNetUnfolderBase]: For 20013/20021 co-relation queries the response was YES. [2024-11-10 10:28:13,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8100 conditions, 1290 events. 621/1290 cut-off events. For 20013/20021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7526 event pairs, 287 based on Foata normal form. 14/1302 useless extension candidates. Maximal degree in co-relation 8042. Up to 966 conditions per place. [2024-11-10 10:28:13,919 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 115 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-11-10 10:28:13,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 159 transitions, 2274 flow [2024-11-10 10:28:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:28:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:28:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-11-10 10:28:13,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33613445378151263 [2024-11-10 10:28:13,920 INFO L175 Difference]: Start difference. First operand has 173 places, 140 transitions, 1767 flow. Second operand 14 states and 160 transitions. [2024-11-10 10:28:13,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 159 transitions, 2274 flow [2024-11-10 10:28:13,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 159 transitions, 2184 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-10 10:28:13,949 INFO L231 Difference]: Finished difference. Result has 176 places, 141 transitions, 1792 flow [2024-11-10 10:28:13,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1792, PETRI_PLACES=176, PETRI_TRANSITIONS=141} [2024-11-10 10:28:13,950 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-11-10 10:28:13,950 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 141 transitions, 1792 flow [2024-11-10 10:28:13,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.206896551724139) internal successors, (267), 29 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:13,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:13,950 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:13,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-10 10:28:14,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:14,151 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:14,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:14,151 INFO L85 PathProgramCache]: Analyzing trace with hash 77188817, now seen corresponding path program 24 times [2024-11-10 10:28:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:14,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070837008] [2024-11-10 10:28:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070837008] [2024-11-10 10:28:14,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070837008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:14,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133560090] [2024-11-10 10:28:14,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:28:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:14,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:14,612 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) [2024-11-10 10:28:14,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-10 10:28:14,793 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-10 10:28:14,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:14,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 10:28:14,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:14,979 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-10 10:28:14,980 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 25 treesize of output 9 [2024-11-10 10:28:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:14,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:15,114 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:15,114 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 44 treesize of output 77 [2024-11-10 10:28:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:15,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133560090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:15,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:15,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-11-10 10:28:15,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385225226] [2024-11-10 10:28:15,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:15,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:28:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:28:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:28:15,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:15,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 141 transitions, 1792 flow. Second operand has 19 states, 19 states have (on average 11.157894736842104) internal successors, (212), 19 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) [2024-11-10 10:28:15,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:15,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:15,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:15,689 INFO L124 PetriNetUnfolderBase]: 630/1315 cut-off events. [2024-11-10 10:28:15,690 INFO L125 PetriNetUnfolderBase]: For 19457/19465 co-relation queries the response was YES. [2024-11-10 10:28:15,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8197 conditions, 1315 events. 630/1315 cut-off events. For 19457/19465 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7786 event pairs, 295 based on Foata normal form. 14/1327 useless extension candidates. Maximal degree in co-relation 8139. Up to 1021 conditions per place. [2024-11-10 10:28:15,701 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 128 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-11-10 10:28:15,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 158 transitions, 2309 flow [2024-11-10 10:28:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:28:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:28:15,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-11-10 10:28:15,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-10 10:28:15,702 INFO L175 Difference]: Start difference. First operand has 176 places, 141 transitions, 1792 flow. Second operand 9 states and 126 transitions. [2024-11-10 10:28:15,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 158 transitions, 2309 flow [2024-11-10 10:28:15,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 158 transitions, 2231 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-11-10 10:28:15,737 INFO L231 Difference]: Finished difference. Result has 173 places, 142 transitions, 1789 flow [2024-11-10 10:28:15,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=173, PETRI_TRANSITIONS=142} [2024-11-10 10:28:15,738 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-11-10 10:28:15,738 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 142 transitions, 1789 flow [2024-11-10 10:28:15,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.157894736842104) internal successors, (212), 19 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) [2024-11-10 10:28:15,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:15,739 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:15,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-10 10:28:15,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:15,939 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:15,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -878651829, now seen corresponding path program 25 times [2024-11-10 10:28:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224445448] [2024-11-10 10:28:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:16,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224445448] [2024-11-10 10:28:16,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224445448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:16,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483277930] [2024-11-10 10:28:16,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:28:16,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:16,493 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) [2024-11-10 10:28:16,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-10 10:28:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:16,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 10:28:16,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:16,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:28:16,749 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 46 treesize of output 34 [2024-11-10 10:28:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:16,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:16,928 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:16,928 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 71 treesize of output 88 [2024-11-10 10:28:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483277930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:16,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:16,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-10 10:28:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931050851] [2024-11-10 10:28:16,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:16,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 10:28:16,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 10:28:16,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-10 10:28:17,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:17,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 142 transitions, 1789 flow. Second operand has 19 states, 19 states have (on average 11.210526315789474) internal successors, (213), 19 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:17,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:17,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:17,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:17,608 INFO L124 PetriNetUnfolderBase]: 610/1267 cut-off events. [2024-11-10 10:28:17,608 INFO L125 PetriNetUnfolderBase]: For 18685/18693 co-relation queries the response was YES. [2024-11-10 10:28:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7947 conditions, 1267 events. 610/1267 cut-off events. For 18685/18693 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7393 event pairs, 284 based on Foata normal form. 13/1274 useless extension candidates. Maximal degree in co-relation 7888. Up to 981 conditions per place. [2024-11-10 10:28:17,619 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 118 selfloop transitions, 26 changer transitions 4/155 dead transitions. [2024-11-10 10:28:17,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 155 transitions, 2210 flow [2024-11-10 10:28:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 10:28:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 10:28:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-11-10 10:28:17,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2024-11-10 10:28:17,620 INFO L175 Difference]: Start difference. First operand has 173 places, 142 transitions, 1789 flow. Second operand 10 states and 137 transitions. [2024-11-10 10:28:17,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 155 transitions, 2210 flow [2024-11-10 10:28:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 155 transitions, 2159 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-10 10:28:17,650 INFO L231 Difference]: Finished difference. Result has 175 places, 138 transitions, 1749 flow [2024-11-10 10:28:17,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1749, PETRI_PLACES=175, PETRI_TRANSITIONS=138} [2024-11-10 10:28:17,651 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-11-10 10:28:17,651 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 138 transitions, 1749 flow [2024-11-10 10:28:17,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.210526315789474) internal successors, (213), 19 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:17,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:17,651 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-10 10:28:17,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:17,852 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:17,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:17,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1083505393, now seen corresponding path program 26 times [2024-11-10 10:28:17,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:17,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429688672] [2024-11-10 10:28:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:17,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429688672] [2024-11-10 10:28:18,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429688672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:18,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133199113] [2024-11-10 10:28:18,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:28:18,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:18,263 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) [2024-11-10 10:28:18,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-10 10:28:18,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:28:18,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:18,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-10 10:28:18,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:18,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:28:18,616 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 46 treesize of output 30 [2024-11-10 10:28:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:18,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:18,820 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:18,821 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 44 treesize of output 77 [2024-11-10 10:28:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133199113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:18,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:18,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-11-10 10:28:18,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533683224] [2024-11-10 10:28:18,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:18,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:28:18,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:28:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:28:18,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:18,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 138 transitions, 1749 flow. Second operand has 20 states, 20 states have (on average 11.35) internal successors, (227), 20 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:18,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:18,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:19,385 INFO L124 PetriNetUnfolderBase]: 610/1269 cut-off events. [2024-11-10 10:28:19,385 INFO L125 PetriNetUnfolderBase]: For 19724/19732 co-relation queries the response was YES. [2024-11-10 10:28:19,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8040 conditions, 1269 events. 610/1269 cut-off events. For 19724/19732 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7400 event pairs, 268 based on Foata normal form. 20/1287 useless extension candidates. Maximal degree in co-relation 7981. Up to 942 conditions per place. [2024-11-10 10:28:19,394 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 120 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-11-10 10:28:19,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 157 transitions, 2296 flow [2024-11-10 10:28:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 10:28:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 10:28:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-11-10 10:28:19,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2024-11-10 10:28:19,395 INFO L175 Difference]: Start difference. First operand has 175 places, 138 transitions, 1749 flow. Second operand 11 states and 152 transitions. [2024-11-10 10:28:19,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 157 transitions, 2296 flow [2024-11-10 10:28:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 157 transitions, 2195 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-11-10 10:28:19,427 INFO L231 Difference]: Finished difference. Result has 172 places, 137 transitions, 1770 flow [2024-11-10 10:28:19,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1770, PETRI_PLACES=172, PETRI_TRANSITIONS=137} [2024-11-10 10:28:19,428 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-11-10 10:28:19,428 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 137 transitions, 1770 flow [2024-11-10 10:28:19,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.35) internal successors, (227), 20 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:19,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:19,429 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:19,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-10 10:28:19,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-10 10:28:19,629 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:28:19,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:28:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1120535731, now seen corresponding path program 27 times [2024-11-10 10:28:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:28:19,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631782798] [2024-11-10 10:28:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:28:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:28:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:28:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:20,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:28:20,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631782798] [2024-11-10 10:28:20,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631782798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:28:20,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460361746] [2024-11-10 10:28:20,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:28:20,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:28:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:28:20,125 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) [2024-11-10 10:28:20,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-10 10:28:20,289 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:28:20,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:28:20,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-10 10:28:20,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:28:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:20,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:28:20,609 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-11-10 10:28:20,610 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 71 treesize of output 88 [2024-11-10 10:28:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-10 10:28:20,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460361746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:28:20,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:28:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-11-10 10:28:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610427763] [2024-11-10 10:28:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:28:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 10:28:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:28:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 10:28:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-10 10:28:20,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-10 10:28:20,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 137 transitions, 1770 flow. Second operand has 21 states, 21 states have (on average 11.238095238095237) internal successors, (236), 21 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:20,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:28:20,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-10 10:28:20,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:28:21,116 INFO L124 PetriNetUnfolderBase]: 593/1221 cut-off events. [2024-11-10 10:28:21,116 INFO L125 PetriNetUnfolderBase]: For 17970/17978 co-relation queries the response was YES. [2024-11-10 10:28:21,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 1221 events. 593/1221 cut-off events. For 17970/17978 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6980 event pairs, 246 based on Foata normal form. 12/1231 useless extension candidates. Maximal degree in co-relation 7661. Up to 918 conditions per place. [2024-11-10 10:28:21,124 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 117 selfloop transitions, 21 changer transitions 10/155 dead transitions. [2024-11-10 10:28:21,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 155 transitions, 2252 flow [2024-11-10 10:28:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:28:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:28:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-11-10 10:28:21,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4084967320261438 [2024-11-10 10:28:21,125 INFO L175 Difference]: Start difference. First operand has 172 places, 137 transitions, 1770 flow. Second operand 9 states and 125 transitions. [2024-11-10 10:28:21,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 155 transitions, 2252 flow [2024-11-10 10:28:21,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 155 transitions, 2184 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-10 10:28:21,154 INFO L231 Difference]: Finished difference. Result has 174 places, 137 transitions, 1755 flow [2024-11-10 10:28:21,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1755, PETRI_PLACES=174, PETRI_TRANSITIONS=137} [2024-11-10 10:28:21,154 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-11-10 10:28:21,155 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 137 transitions, 1755 flow [2024-11-10 10:28:21,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.238095238095237) internal successors, (236), 21 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:28:21,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:28:21,155 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:28:21,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0