./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:22:22,514 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:22:22,577 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:22:22,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:22:22,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:22:22,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:22:22,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:22:22,613 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:22:22,614 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:22:22,614 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:22:22,615 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:22:22,615 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:22:22,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:22:22,617 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:22:22,617 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:22:22,618 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:22:22,619 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:22:22,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:22:22,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:22:22,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:22:22,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:22:22,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:22:22,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:22:22,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:22:22,623 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:22:22,623 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:22:22,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:22:22,623 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:22:22,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:22:22,624 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:22:22,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:22:22,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:22:22,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:22:22,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:22:22,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:22:22,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:22:22,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:22:22,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:22:22,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:22:22,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:22:22,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:22:22,629 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:22:22,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-11-12 08:22:22,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:22:22,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:22:22,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:22:22,945 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:22:22,945 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:22:22,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-12 08:22:24,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:22:24,540 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:22:24,541 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-12 08:22:24,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ade9276/f2194d56a1434f3abc26848571584fce/FLAG1d884828b [2024-11-12 08:22:24,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ade9276/f2194d56a1434f3abc26848571584fce [2024-11-12 08:22:24,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:22:24,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:22:24,573 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:22:24,575 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:22:24,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:22:24,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678d6c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24, skipping insertion in model container [2024-11-12 08:22:24,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,609 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:22:24,808 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/parallel-misc-1.wvr.c[2781,2794] [2024-11-12 08:22:24,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:22:24,833 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:22:24,854 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/parallel-misc-1.wvr.c[2781,2794] [2024-11-12 08:22:24,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:22:24,874 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:22:24,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24 WrapperNode [2024-11-12 08:22:24,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:22:24,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:22:24,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:22:24,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:22:24,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,920 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 277 [2024-11-12 08:22:24,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:22:24,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:22:24,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:22:24,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:22:24,933 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,937 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,972 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-12 08:22:24,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,992 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:24,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:25,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:25,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:22:25,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:22:25,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:22:25,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:22:25,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (1/1) ... [2024-11-12 08:22:25,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:22:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:25,049 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) [2024-11-12 08:22:25,051 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 [2024-11-12 08:22:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:22:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:22:25,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:22:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:22:25,109 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:22:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:22:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:22:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:22:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:22:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:22:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:22:25,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:22:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:22:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:22:25,116 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:22:25,220 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:22:25,222 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:22:25,731 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:22:25,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:22:26,178 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:22:26,179 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 08:22:26,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:22:26 BoogieIcfgContainer [2024-11-12 08:22:26,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:22:26,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:22:26,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:22:26,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:22:26,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:22:24" (1/3) ... [2024-11-12 08:22:26,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2ca3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:22:26, skipping insertion in model container [2024-11-12 08:22:26,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:22:24" (2/3) ... [2024-11-12 08:22:26,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2ca3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:22:26, skipping insertion in model container [2024-11-12 08:22:26,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:22:26" (3/3) ... [2024-11-12 08:22:26,191 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-11-12 08:22:26,211 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:22:26,211 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:22:26,211 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:22:26,268 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:22:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-12 08:22:26,336 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-12 08:22:26,340 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:22:26,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-12 08:22:26,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-12 08:22:26,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-12 08:22:26,360 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:22:26,366 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;@52c3f6c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:22:26,366 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:22:26,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:22:26,374 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-12 08:22:26,374 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:22:26,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:26,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:26,376 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:26,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 21008040, now seen corresponding path program 1 times [2024-11-12 08:22:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76895373] [2024-11-12 08:22:26,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76895373] [2024-11-12 08:22:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76895373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:22:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:22:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:22:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877200116] [2024-11-12 08:22:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:22:27,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:22:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:27,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:22:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:22:27,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:27,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:27,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:27,374 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2024-11-12 08:22:27,374 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 08:22:27,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 429 event pairs, 8 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2024-11-12 08:22:27,380 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2024-11-12 08:22:27,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2024-11-12 08:22:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:22:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:22:27,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-12 08:22:27,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-12 08:22:27,395 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2024-11-12 08:22:27,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2024-11-12 08:22:27,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:22:27,401 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2024-11-12 08:22:27,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2024-11-12 08:22:27,408 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2024-11-12 08:22:27,409 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2024-11-12 08:22:27,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:27,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:27,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:22:27,410 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:27,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1326643493, now seen corresponding path program 1 times [2024-11-12 08:22:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975875530] [2024-11-12 08:22:27,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:27,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975875530] [2024-11-12 08:22:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975875530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:22:27,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:22:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:22:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388850514] [2024-11-12 08:22:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:22:27,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:22:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:22:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:22:27,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:27,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:27,663 INFO L124 PetriNetUnfolderBase]: 121/208 cut-off events. [2024-11-12 08:22:27,663 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-11-12 08:22:27,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 208 events. 121/208 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 709 event pairs, 41 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 368. Up to 107 conditions per place. [2024-11-12 08:22:27,668 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 6 changer transitions 0/40 dead transitions. [2024-11-12 08:22:27,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 40 transitions, 230 flow [2024-11-12 08:22:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:22:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:22:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-11-12 08:22:27,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-12 08:22:27,672 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 4 states and 45 transitions. [2024-11-12 08:22:27,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 40 transitions, 230 flow [2024-11-12 08:22:27,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 40 transitions, 224 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-12 08:22:27,676 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 153 flow [2024-11-12 08:22:27,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-11-12 08:22:27,677 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-11-12 08:22:27,678 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 153 flow [2024-11-12 08:22:27,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:27,678 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:27,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:22:27,679 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:27,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2063276826, now seen corresponding path program 1 times [2024-11-12 08:22:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:27,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671694752] [2024-11-12 08:22:27,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:27,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:27,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671694752] [2024-11-12 08:22:27,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671694752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:22:27,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:22:27,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 08:22:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502327373] [2024-11-12 08:22:27,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:22:27,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:22:27,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:22:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:22:27,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:27,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:27,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:27,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:27,929 INFO L124 PetriNetUnfolderBase]: 96/171 cut-off events. [2024-11-12 08:22:27,930 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-11-12 08:22:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 171 events. 96/171 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 562 event pairs, 26 based on Foata normal form. 5/169 useless extension candidates. Maximal degree in co-relation 497. Up to 88 conditions per place. [2024-11-12 08:22:27,933 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 28 selfloop transitions, 4 changer transitions 4/39 dead transitions. [2024-11-12 08:22:27,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 268 flow [2024-11-12 08:22:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:22:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:22:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-11-12 08:22:27,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-12 08:22:27,935 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 153 flow. Second operand 4 states and 44 transitions. [2024-11-12 08:22:27,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 268 flow [2024-11-12 08:22:27,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 264 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-12 08:22:27,938 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 139 flow [2024-11-12 08:22:27,938 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-11-12 08:22:27,939 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2024-11-12 08:22:27,939 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 139 flow [2024-11-12 08:22:27,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:27,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:27,939 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:27,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 08:22:27,940 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:27,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1339064740, now seen corresponding path program 1 times [2024-11-12 08:22:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:27,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952255354] [2024-11-12 08:22:27,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:28,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952255354] [2024-11-12 08:22:28,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952255354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:28,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037413545] [2024-11-12 08:22:28,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:28,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:28,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:28,057 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) [2024-11-12 08:22:28,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:22:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:28,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 08:22:28,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037413545] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:28,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:22:28,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-11-12 08:22:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922832598] [2024-11-12 08:22:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:22:28,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:22:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:22:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:22:28,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:28,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:28,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:28,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:28,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:28,419 INFO L124 PetriNetUnfolderBase]: 76/129 cut-off events. [2024-11-12 08:22:28,420 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-11-12 08:22:28,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 129 events. 76/129 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 339 event pairs, 12 based on Foata normal form. 9/133 useless extension candidates. Maximal degree in co-relation 452. Up to 80 conditions per place. [2024-11-12 08:22:28,423 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-11-12 08:22:28,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 243 flow [2024-11-12 08:22:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:22:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:22:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2024-11-12 08:22:28,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-12 08:22:28,425 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 139 flow. Second operand 5 states and 46 transitions. [2024-11-12 08:22:28,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 243 flow [2024-11-12 08:22:28,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 201 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-12 08:22:28,428 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 138 flow [2024-11-12 08:22:28,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-11-12 08:22:28,429 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-11-12 08:22:28,429 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 138 flow [2024-11-12 08:22:28,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:28,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:28,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:28,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 08:22:28,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:28,631 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:28,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -94130901, now seen corresponding path program 1 times [2024-11-12 08:22:28,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564343937] [2024-11-12 08:22:28,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564343937] [2024-11-12 08:22:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564343937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:28,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231571358] [2024-11-12 08:22:28,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:28,738 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) [2024-11-12 08:22:28,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:22:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:28,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 08:22:28,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231571358] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:28,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:22:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2024-11-12 08:22:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852394995] [2024-11-12 08:22:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:22:28,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:22:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:22:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:22:28,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:28,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:28,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:28,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:28,984 INFO L124 PetriNetUnfolderBase]: 59/102 cut-off events. [2024-11-12 08:22:28,984 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-12 08:22:28,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 102 events. 59/102 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 213 event pairs, 5 based on Foata normal form. 9/107 useless extension candidates. Maximal degree in co-relation 351. Up to 80 conditions per place. [2024-11-12 08:22:28,986 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 26 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-11-12 08:22:28,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 228 flow [2024-11-12 08:22:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:22:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:22:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-12 08:22:28,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-12 08:22:28,988 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 138 flow. Second operand 5 states and 47 transitions. [2024-11-12 08:22:28,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 228 flow [2024-11-12 08:22:28,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:22:28,990 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 159 flow [2024-11-12 08:22:28,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-12 08:22:28,991 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-12 08:22:28,991 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 159 flow [2024-11-12 08:22:28,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:28,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:28,991 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:29,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:29,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:29,193 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:29,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1914839235, now seen corresponding path program 1 times [2024-11-12 08:22:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:29,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051971117] [2024-11-12 08:22:29,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:29,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051971117] [2024-11-12 08:22:29,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051971117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:29,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793677741] [2024-11-12 08:22:29,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:29,930 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) [2024-11-12 08:22:29,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:22:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:30,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 08:22:30,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:30,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:30,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-11-12 08:22:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:30,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793677741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:31,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:31,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-12 08:22:31,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955564778] [2024-11-12 08:22:31,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:31,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:22:31,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:22:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:22:31,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:31,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 159 flow. Second operand has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:31,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:31,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:31,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:31,495 INFO L124 PetriNetUnfolderBase]: 72/129 cut-off events. [2024-11-12 08:22:31,495 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-11-12 08:22:31,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 129 events. 72/129 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 324 event pairs, 0 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 491. Up to 87 conditions per place. [2024-11-12 08:22:31,497 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 31 selfloop transitions, 17 changer transitions 3/54 dead transitions. [2024-11-12 08:22:31,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 357 flow [2024-11-12 08:22:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:22:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:22:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-11-12 08:22:31,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-11-12 08:22:31,500 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 159 flow. Second operand 9 states and 88 transitions. [2024-11-12 08:22:31,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 357 flow [2024-11-12 08:22:31,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 08:22:31,502 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 275 flow [2024-11-12 08:22:31,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=275, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-11-12 08:22:31,503 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-11-12 08:22:31,503 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 275 flow [2024-11-12 08:22:31,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.25) internal successors, (116), 16 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:31,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:31,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:31,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:22:31,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:31,705 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:31,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -168671343, now seen corresponding path program 2 times [2024-11-12 08:22:31,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:31,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058807123] [2024-11-12 08:22:31,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:33,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:33,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058807123] [2024-11-12 08:22:33,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058807123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:33,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991934324] [2024-11-12 08:22:33,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:22:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:33,089 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) [2024-11-12 08:22:33,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:22:33,171 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:22:33,172 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:33,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 08:22:33,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:33,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:33,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-11-12 08:22:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:33,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991934324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:34,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:34,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2024-11-12 08:22:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436436921] [2024-11-12 08:22:34,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:34,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:22:34,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:22:34,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:22:34,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:34,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 275 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:34,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:34,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:34,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:34,517 INFO L124 PetriNetUnfolderBase]: 72/131 cut-off events. [2024-11-12 08:22:34,517 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-11-12 08:22:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 131 events. 72/131 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 2 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 610. Up to 97 conditions per place. [2024-11-12 08:22:34,521 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 26 selfloop transitions, 20 changer transitions 3/52 dead transitions. [2024-11-12 08:22:34,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 418 flow [2024-11-12 08:22:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 08:22:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 08:22:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2024-11-12 08:22:34,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-12 08:22:34,524 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 275 flow. Second operand 10 states and 96 transitions. [2024-11-12 08:22:34,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 418 flow [2024-11-12 08:22:34,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 380 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-11-12 08:22:34,534 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 298 flow [2024-11-12 08:22:34,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=298, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2024-11-12 08:22:34,535 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2024-11-12 08:22:34,535 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 298 flow [2024-11-12 08:22:34,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:34,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:34,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:34,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 08:22:34,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:34,741 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:34,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1822197659, now seen corresponding path program 3 times [2024-11-12 08:22:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838691154] [2024-11-12 08:22:34,742 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:35,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:35,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838691154] [2024-11-12 08:22:35,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838691154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:35,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299852845] [2024-11-12 08:22:35,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:22:35,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:35,317 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) [2024-11-12 08:22:35,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:22:35,400 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:22:35,401 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:35,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 08:22:35,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:35,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2024-11-12 08:22:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:35,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:36,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:22:36,007 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 233 treesize of output 145 [2024-11-12 08:22:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299852845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:36,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-12 08:22:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586976310] [2024-11-12 08:22:36,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:36,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:22:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:22:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:22:36,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:36,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 298 flow. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:36,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:36,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:36,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:36,707 INFO L124 PetriNetUnfolderBase]: 95/170 cut-off events. [2024-11-12 08:22:36,707 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-12 08:22:36,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 170 events. 95/170 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 490 event pairs, 0 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 815. Up to 107 conditions per place. [2024-11-12 08:22:36,709 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 22 changer transitions 4/67 dead transitions. [2024-11-12 08:22:36,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 551 flow [2024-11-12 08:22:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 08:22:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 08:22:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-11-12 08:22:36,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-12 08:22:36,711 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 298 flow. Second operand 12 states and 116 transitions. [2024-11-12 08:22:36,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 551 flow [2024-11-12 08:22:36,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 460 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-11-12 08:22:36,714 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 324 flow [2024-11-12 08:22:36,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=324, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-11-12 08:22:36,715 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2024-11-12 08:22:36,715 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 324 flow [2024-11-12 08:22:36,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:36,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:36,715 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:36,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:36,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:36,916 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:36,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:36,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1625165103, now seen corresponding path program 4 times [2024-11-12 08:22:36,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:36,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472924518] [2024-11-12 08:22:36,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472924518] [2024-11-12 08:22:37,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472924518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:37,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361413990] [2024-11-12 08:22:37,493 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:22:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:37,496 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) [2024-11-12 08:22:37,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:22:37,581 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:22:37,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:37,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 08:22:37,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:37,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-11-12 08:22:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:37,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:38,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:22:38,008 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 200 treesize of output 144 [2024-11-12 08:22:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:38,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361413990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:38,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-12 08:22:38,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066710391] [2024-11-12 08:22:38,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:38,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 08:22:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 08:22:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-12 08:22:38,274 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:38,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 324 flow. Second operand has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:38,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:38,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:38,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:38,513 INFO L124 PetriNetUnfolderBase]: 96/175 cut-off events. [2024-11-12 08:22:38,513 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2024-11-12 08:22:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 175 events. 96/175 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 521 event pairs, 0 based on Foata normal form. 1/170 useless extension candidates. Maximal degree in co-relation 859. Up to 133 conditions per place. [2024-11-12 08:22:38,515 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 40 selfloop transitions, 18 changer transitions 3/64 dead transitions. [2024-11-12 08:22:38,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 515 flow [2024-11-12 08:22:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:22:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:22:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-11-12 08:22:38,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-11-12 08:22:38,516 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 324 flow. Second operand 11 states and 103 transitions. [2024-11-12 08:22:38,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 515 flow [2024-11-12 08:22:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 457 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-11-12 08:22:38,520 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 337 flow [2024-11-12 08:22:38,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-11-12 08:22:38,521 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 39 predicate places. [2024-11-12 08:22:38,521 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 337 flow [2024-11-12 08:22:38,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0625) internal successors, (113), 16 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:38,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:38,522 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:38,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:22:38,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:38,727 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:38,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1825793813, now seen corresponding path program 5 times [2024-11-12 08:22:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:38,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757080845] [2024-11-12 08:22:38,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:38,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:39,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:39,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757080845] [2024-11-12 08:22:39,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757080845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:39,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016418230] [2024-11-12 08:22:39,180 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:22:39,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:39,181 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) [2024-11-12 08:22:39,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:22:39,258 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:22:39,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:39,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 08:22:39,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:39,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:39,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-11-12 08:22:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:39,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016418230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:40,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:40,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-12 08:22:40,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871692232] [2024-11-12 08:22:40,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:40,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:22:40,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:22:40,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:22:40,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:40,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 337 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:40,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:40,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:40,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:40,817 INFO L124 PetriNetUnfolderBase]: 125/230 cut-off events. [2024-11-12 08:22:40,817 INFO L125 PetriNetUnfolderBase]: For 984/984 co-relation queries the response was YES. [2024-11-12 08:22:40,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 230 events. 125/230 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 732 event pairs, 1 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 1010. Up to 140 conditions per place. [2024-11-12 08:22:40,820 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 48 selfloop transitions, 41 changer transitions 5/97 dead transitions. [2024-11-12 08:22:40,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 857 flow [2024-11-12 08:22:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 08:22:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 08:22:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 168 transitions. [2024-11-12 08:22:40,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-12 08:22:40,822 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 337 flow. Second operand 18 states and 168 transitions. [2024-11-12 08:22:40,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 857 flow [2024-11-12 08:22:40,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 97 transitions, 790 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-11-12 08:22:40,830 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 612 flow [2024-11-12 08:22:40,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=612, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-12 08:22:40,832 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2024-11-12 08:22:40,832 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 612 flow [2024-11-12 08:22:40,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:40,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:40,833 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:40,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 08:22:41,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:41,034 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:41,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash 843215203, now seen corresponding path program 6 times [2024-11-12 08:22:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997892864] [2024-11-12 08:22:41,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:41,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:41,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997892864] [2024-11-12 08:22:41,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997892864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:41,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463962014] [2024-11-12 08:22:41,609 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:22:41,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:41,611 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) [2024-11-12 08:22:41,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:22:41,694 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:22:41,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:41,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 08:22:41,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:41,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:41,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2024-11-12 08:22:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:41,931 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:42,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463962014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:42,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:42,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-12 08:22:42,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32178363] [2024-11-12 08:22:42,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:42,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:22:42,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:22:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:22:42,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:42,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 612 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:42,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:42,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:42,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:42,974 INFO L124 PetriNetUnfolderBase]: 126/234 cut-off events. [2024-11-12 08:22:42,974 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2024-11-12 08:22:42,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 234 events. 126/234 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 3 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 1240. Up to 175 conditions per place. [2024-11-12 08:22:42,977 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 51 selfloop transitions, 27 changer transitions 3/84 dead transitions. [2024-11-12 08:22:42,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 834 flow [2024-11-12 08:22:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:22:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:22:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-11-12 08:22:42,978 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-11-12 08:22:42,978 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 612 flow. Second operand 11 states and 104 transitions. [2024-11-12 08:22:42,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 834 flow [2024-11-12 08:22:42,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 84 transitions, 635 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-11-12 08:22:42,984 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 494 flow [2024-11-12 08:22:42,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=494, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-11-12 08:22:42,985 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-11-12 08:22:42,985 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 494 flow [2024-11-12 08:22:42,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:42,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:42,986 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:43,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:43,186 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,SelfDestructingSolverStorable10 [2024-11-12 08:22:43,187 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:43,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:43,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1825214790, now seen corresponding path program 7 times [2024-11-12 08:22:43,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:43,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775914559] [2024-11-12 08:22:43,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:43,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775914559] [2024-11-12 08:22:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775914559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093488038] [2024-11-12 08:22:43,295 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:22:43,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:43,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:43,297 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) [2024-11-12 08:22:43,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 08:22:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:43,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:22:43,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:43,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093488038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:43,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:43,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-12 08:22:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799185026] [2024-11-12 08:22:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:43,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 08:22:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:43,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 08:22:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-12 08:22:43,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:43,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 494 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:43,659 INFO L124 PetriNetUnfolderBase]: 173/346 cut-off events. [2024-11-12 08:22:43,659 INFO L125 PetriNetUnfolderBase]: For 1102/1102 co-relation queries the response was YES. [2024-11-12 08:22:43,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 346 events. 173/346 cut-off events. For 1102/1102 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1432 event pairs, 53 based on Foata normal form. 16/351 useless extension candidates. Maximal degree in co-relation 1540. Up to 138 conditions per place. [2024-11-12 08:22:43,662 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 81 selfloop transitions, 14 changer transitions 4/102 dead transitions. [2024-11-12 08:22:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 968 flow [2024-11-12 08:22:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 08:22:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 08:22:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-11-12 08:22:43,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-11-12 08:22:43,664 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 494 flow. Second operand 7 states and 72 transitions. [2024-11-12 08:22:43,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 968 flow [2024-11-12 08:22:43,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 874 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-11-12 08:22:43,670 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 540 flow [2024-11-12 08:22:43,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=540, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-11-12 08:22:43,671 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2024-11-12 08:22:43,671 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 540 flow [2024-11-12 08:22:43,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:43,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:43,671 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:43,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 08:22:43,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:43,872 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:43,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1983300111, now seen corresponding path program 8 times [2024-11-12 08:22:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:43,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640700572] [2024-11-12 08:22:43,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:43,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:43,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640700572] [2024-11-12 08:22:43,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640700572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:43,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301243477] [2024-11-12 08:22:43,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:22:43,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:43,975 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) [2024-11-12 08:22:43,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 08:22:44,069 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:22:44,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:44,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 08:22:44,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:44,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 08:22:44,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301243477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:44,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:44,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 14 [2024-11-12 08:22:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005614747] [2024-11-12 08:22:44,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:44,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 08:22:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 08:22:44,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-12 08:22:44,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:44,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 540 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:44,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:44,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:44,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:44,477 INFO L124 PetriNetUnfolderBase]: 122/252 cut-off events. [2024-11-12 08:22:44,477 INFO L125 PetriNetUnfolderBase]: For 868/868 co-relation queries the response was YES. [2024-11-12 08:22:44,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 252 events. 122/252 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 976 event pairs, 3 based on Foata normal form. 19/267 useless extension candidates. Maximal degree in co-relation 1131. Up to 81 conditions per place. [2024-11-12 08:22:44,480 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 54 selfloop transitions, 24 changer transitions 21/102 dead transitions. [2024-11-12 08:22:44,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 102 transitions, 898 flow [2024-11-12 08:22:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 08:22:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 08:22:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 139 transitions. [2024-11-12 08:22:44,481 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-11-12 08:22:44,481 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 540 flow. Second operand 14 states and 139 transitions. [2024-11-12 08:22:44,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 102 transitions, 898 flow [2024-11-12 08:22:44,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 883 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 08:22:44,487 INFO L231 Difference]: Finished difference. Result has 85 places, 60 transitions, 526 flow [2024-11-12 08:22:44,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=526, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2024-11-12 08:22:44,488 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2024-11-12 08:22:44,488 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 526 flow [2024-11-12 08:22:44,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:44,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:44,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:44,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 08:22:44,692 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,SelfDestructingSolverStorable12 [2024-11-12 08:22:44,693 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:44,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:44,693 INFO L85 PathProgramCache]: Analyzing trace with hash -871290198, now seen corresponding path program 9 times [2024-11-12 08:22:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:44,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929023880] [2024-11-12 08:22:44,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:44,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:44,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:44,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929023880] [2024-11-12 08:22:44,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929023880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:44,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283871111] [2024-11-12 08:22:44,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:22:44,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:44,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:44,821 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) [2024-11-12 08:22:44,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 08:22:44,905 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:22:44,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:44,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:22:44,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:44,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283871111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:45,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-12 08:22:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752860110] [2024-11-12 08:22:45,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:45,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 08:22:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 08:22:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-12 08:22:45,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:45,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 526 flow. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:45,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:45,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:45,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:45,138 INFO L124 PetriNetUnfolderBase]: 98/184 cut-off events. [2024-11-12 08:22:45,138 INFO L125 PetriNetUnfolderBase]: For 1368/1368 co-relation queries the response was YES. [2024-11-12 08:22:45,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 184 events. 98/184 cut-off events. For 1368/1368 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 554 event pairs, 6 based on Foata normal form. 14/196 useless extension candidates. Maximal degree in co-relation 1030. Up to 120 conditions per place. [2024-11-12 08:22:45,143 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 45 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2024-11-12 08:22:45,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 65 transitions, 712 flow [2024-11-12 08:22:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 08:22:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 08:22:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2024-11-12 08:22:45,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-11-12 08:22:45,144 INFO L175 Difference]: Start difference. First operand has 85 places, 60 transitions, 526 flow. Second operand 8 states and 69 transitions. [2024-11-12 08:22:45,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 65 transitions, 712 flow [2024-11-12 08:22:45,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 586 flow, removed 44 selfloop flow, removed 14 redundant places. [2024-11-12 08:22:45,150 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 443 flow [2024-11-12 08:22:45,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-12 08:22:45,151 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-11-12 08:22:45,151 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 443 flow [2024-11-12 08:22:45,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:45,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:45,152 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:45,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:45,352 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,SelfDestructingSolverStorable13 [2024-11-12 08:22:45,352 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:45,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2120630681, now seen corresponding path program 10 times [2024-11-12 08:22:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997757558] [2024-11-12 08:22:45,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:45,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997757558] [2024-11-12 08:22:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997757558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296691303] [2024-11-12 08:22:45,472 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:22:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:45,474 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) [2024-11-12 08:22:45,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 08:22:45,570 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:22:45,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:45,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 08:22:45,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:45,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 08:22:45,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296691303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:45,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:45,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-12 08:22:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354047678] [2024-11-12 08:22:45,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:45,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 08:22:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:45,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 08:22:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-12 08:22:45,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:45,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 443 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:45,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:45,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:45,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:45,790 INFO L124 PetriNetUnfolderBase]: 95/179 cut-off events. [2024-11-12 08:22:45,791 INFO L125 PetriNetUnfolderBase]: For 959/959 co-relation queries the response was YES. [2024-11-12 08:22:45,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 179 events. 95/179 cut-off events. For 959/959 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 514 event pairs, 18 based on Foata normal form. 11/187 useless extension candidates. Maximal degree in co-relation 943. Up to 74 conditions per place. [2024-11-12 08:22:45,793 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 36 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2024-11-12 08:22:45,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 56 transitions, 562 flow [2024-11-12 08:22:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 08:22:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 08:22:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2024-11-12 08:22:45,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-12 08:22:45,797 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 443 flow. Second operand 8 states and 67 transitions. [2024-11-12 08:22:45,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 56 transitions, 562 flow [2024-11-12 08:22:45,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 510 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-11-12 08:22:45,801 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 404 flow [2024-11-12 08:22:45,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2024-11-12 08:22:45,803 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2024-11-12 08:22:45,803 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 404 flow [2024-11-12 08:22:45,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:45,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:45,803 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:45,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:46,006 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,SelfDestructingSolverStorable14 [2024-11-12 08:22:46,007 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:46,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash 630188170, now seen corresponding path program 11 times [2024-11-12 08:22:46,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:46,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604608692] [2024-11-12 08:22:46,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:46,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:47,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:47,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604608692] [2024-11-12 08:22:47,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604608692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:47,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078110536] [2024-11-12 08:22:47,509 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:22:47,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:47,510 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) [2024-11-12 08:22:47,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 08:22:47,603 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:22:47,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:47,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:22:47,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:47,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:48,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:22:48,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 140 [2024-11-12 08:22:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:48,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:22:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:22:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078110536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:22:52,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:22:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2024-11-12 08:22:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757789272] [2024-11-12 08:22:52,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:22:52,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 08:22:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:22:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 08:22:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-11-12 08:22:52,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:22:52,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 404 flow. Second operand has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:52,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:22:52,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:22:52,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:22:53,121 INFO L124 PetriNetUnfolderBase]: 123/229 cut-off events. [2024-11-12 08:22:53,121 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2024-11-12 08:22:53,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 229 events. 123/229 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 705 event pairs, 2 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 1296. Up to 150 conditions per place. [2024-11-12 08:22:53,124 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 57 selfloop transitions, 28 changer transitions 4/92 dead transitions. [2024-11-12 08:22:53,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 92 transitions, 859 flow [2024-11-12 08:22:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 08:22:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 08:22:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 162 transitions. [2024-11-12 08:22:53,125 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-12 08:22:53,125 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 404 flow. Second operand 18 states and 162 transitions. [2024-11-12 08:22:53,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 92 transitions, 859 flow [2024-11-12 08:22:53,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 796 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-11-12 08:22:53,131 INFO L231 Difference]: Finished difference. Result has 79 places, 61 transitions, 610 flow [2024-11-12 08:22:53,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=610, PETRI_PLACES=79, PETRI_TRANSITIONS=61} [2024-11-12 08:22:53,131 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2024-11-12 08:22:53,132 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 61 transitions, 610 flow [2024-11-12 08:22:53,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.730769230769231) internal successors, (175), 26 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:22:53,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:22:53,132 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:22:53,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 08:22:53,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-12 08:22:53,333 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:22:53,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:22:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -808731640, now seen corresponding path program 12 times [2024-11-12 08:22:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:22:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577036104] [2024-11-12 08:22:53,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:22:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:22:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:22:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:54,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:22:54,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577036104] [2024-11-12 08:22:54,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577036104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:22:54,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604804292] [2024-11-12 08:22:54,714 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:22:54,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:22:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:22:54,716 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) [2024-11-12 08:22:54,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 08:22:54,819 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-12 08:22:54,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:22:54,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-12 08:22:54,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:22:54,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:22:56,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:22:56,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 263 treesize of output 257 [2024-11-12 08:22:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:22:57,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:23:04,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 168 [2024-11-12 08:23:04,906 INFO L349 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2024-11-12 08:23:04,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 360 treesize of output 285 [2024-11-12 08:23:06,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2024-11-12 08:23:06,410 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-12 08:23:06,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 1 [2024-11-12 08:23:06,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 86 [2024-11-12 08:23:06,425 INFO L349 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2024-11-12 08:23:06,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 1 [2024-11-12 08:23:06,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 171 [2024-11-12 08:23:06,443 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-11-12 08:23:06,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 1 [2024-11-12 08:23:06,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 216 [2024-11-12 08:23:06,464 INFO L349 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2024-11-12 08:23:06,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 422 treesize of output 1 [2024-11-12 08:23:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:23:06,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604804292] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:23:06,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:23:06,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-11-12 08:23:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796808832] [2024-11-12 08:23:06,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:23:06,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-12 08:23:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:23:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-12 08:23:06,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2024-11-12 08:23:06,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:23:06,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 61 transitions, 610 flow. Second operand has 30 states, 30 states have (on average 6.566666666666666) internal successors, (197), 30 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:23:06,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:23:06,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:23:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:23:12,207 INFO L124 PetriNetUnfolderBase]: 206/382 cut-off events. [2024-11-12 08:23:12,207 INFO L125 PetriNetUnfolderBase]: For 1720/1720 co-relation queries the response was YES. [2024-11-12 08:23:12,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2249 conditions, 382 events. 206/382 cut-off events. For 1720/1720 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1447 event pairs, 3 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 1943. Up to 190 conditions per place. [2024-11-12 08:23:12,210 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 98 selfloop transitions, 60 changer transitions 8/169 dead transitions. [2024-11-12 08:23:12,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 169 transitions, 1588 flow [2024-11-12 08:23:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-12 08:23:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-12 08:23:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 311 transitions. [2024-11-12 08:23:12,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4573529411764706 [2024-11-12 08:23:12,212 INFO L175 Difference]: Start difference. First operand has 79 places, 61 transitions, 610 flow. Second operand 34 states and 311 transitions. [2024-11-12 08:23:12,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 169 transitions, 1588 flow [2024-11-12 08:23:12,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 1407 flow, removed 64 selfloop flow, removed 11 redundant places. [2024-11-12 08:23:12,224 INFO L231 Difference]: Finished difference. Result has 108 places, 100 transitions, 1049 flow [2024-11-12 08:23:12,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1049, PETRI_PLACES=108, PETRI_TRANSITIONS=100} [2024-11-12 08:23:12,225 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 87 predicate places. [2024-11-12 08:23:12,225 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 100 transitions, 1049 flow [2024-11-12 08:23:12,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.566666666666666) internal successors, (197), 30 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:23:12,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:23:12,226 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:23:12,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-12 08:23:12,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:23:12,426 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:23:12,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:23:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1812091346, now seen corresponding path program 13 times [2024-11-12 08:23:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:23:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662809763] [2024-11-12 08:23:12,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:23:12,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:23:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:23:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:23:14,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:23:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662809763] [2024-11-12 08:23:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662809763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:23:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664876575] [2024-11-12 08:23:14,469 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:23:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:23:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:23:14,471 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) [2024-11-12 08:23:14,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 08:23:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:23:14,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 08:23:14,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:23:15,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:23:15,078 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 223 treesize of output 145 [2024-11-12 08:23:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:23:15,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:23:16,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:23:16,324 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 966 treesize of output 426 [2024-11-12 08:23:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 08:23:24,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664876575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:23:24,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:23:24,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-11-12 08:23:24,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63192266] [2024-11-12 08:23:24,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:23:24,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 08:23:24,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:23:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 08:23:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-12 08:23:24,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-12 08:23:24,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 100 transitions, 1049 flow. Second operand has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:23:24,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:23:24,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-12 08:23:24,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:23:25,903 INFO L124 PetriNetUnfolderBase]: 273/483 cut-off events. [2024-11-12 08:23:25,904 INFO L125 PetriNetUnfolderBase]: For 2604/2604 co-relation queries the response was YES. [2024-11-12 08:23:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 483 events. 273/483 cut-off events. For 2604/2604 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1899 event pairs, 3 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 3053. Up to 285 conditions per place. [2024-11-12 08:23:25,909 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 79 selfloop transitions, 83 changer transitions 5/170 dead transitions. [2024-11-12 08:23:25,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 2019 flow [2024-11-12 08:23:25,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 08:23:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 08:23:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 215 transitions. [2024-11-12 08:23:25,911 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4673913043478261 [2024-11-12 08:23:25,912 INFO L175 Difference]: Start difference. First operand has 108 places, 100 transitions, 1049 flow. Second operand 23 states and 215 transitions. [2024-11-12 08:23:25,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 170 transitions, 2019 flow [2024-11-12 08:23:25,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1669 flow, removed 150 selfloop flow, removed 14 redundant places. [2024-11-12 08:23:25,929 INFO L231 Difference]: Finished difference. Result has 119 places, 132 transitions, 1459 flow [2024-11-12 08:23:25,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1459, PETRI_PLACES=119, PETRI_TRANSITIONS=132} [2024-11-12 08:23:25,930 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2024-11-12 08:23:25,930 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 132 transitions, 1459 flow [2024-11-12 08:23:25,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.62962962962963) internal successors, (179), 27 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:23:25,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:23:25,931 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:23:25,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-12 08:23:26,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 08:23:26,132 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:23:26,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:23:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1610660504, now seen corresponding path program 14 times [2024-11-12 08:23:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:23:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327838559] [2024-11-12 08:23:26,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:23:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:23:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:23:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:23:27,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:23:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327838559] [2024-11-12 08:23:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327838559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:23:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799689029] [2024-11-12 08:23:27,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:23:27,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:23:27,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:23:27,684 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) [2024-11-12 08:23:27,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 08:23:27,765 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:23:27,766 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:23:27,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-12 08:23:27,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:23:27,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:23:28,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:23:28,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 256 [2024-11-12 08:23:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:23:35,165 INFO L312 TraceCheckSpWp]: Computing backward predicates...