./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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/unroll-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:55:36,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:55:36,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:55:36,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:55:36,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:55:36,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:55:36,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:55:36,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:55:36,811 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:55:36,812 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:55:36,812 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:55:36,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:55:36,813 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:55:36,813 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:55:36,815 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:55:36,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:55:36,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:55:36,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:55:36,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:55:36,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:55:36,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:55:36,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:55:36,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:55:36,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:55:36,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:55:36,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:55:36,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:55:36,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:55:36,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:55:36,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:55:36,820 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:55:36,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:55:36,822 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-19 01:55:37,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:55:37,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:55:37,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:55:37,044 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:55:37,044 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:55:37,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-19 01:55:38,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:55:38,429 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:55:38,430 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-19 01:55:38,437 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0734926/33c29fc9d8aa49e0b8317adc5f11c1df/FLAG003ff1eb1 [2024-11-19 01:55:38,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac0734926/33c29fc9d8aa49e0b8317adc5f11c1df [2024-11-19 01:55:38,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:55:38,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:55:38,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:55:38,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:55:38,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:55:38,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79854c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38, skipping insertion in model container [2024-11-19 01:55:38,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,475 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:55:38,650 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/unroll-3.wvr.c[2526,2539] [2024-11-19 01:55:38,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:55:38,670 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:55:38,684 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/unroll-3.wvr.c[2526,2539] [2024-11-19 01:55:38,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:55:38,698 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:55:38,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38 WrapperNode [2024-11-19 01:55:38,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:55:38,701 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:55:38,701 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:55:38,701 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:55:38,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,772 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 137 [2024-11-19 01:55:38,772 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:55:38,773 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:55:38,773 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:55:38,773 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:55:38,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,784 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,795 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 01:55:38,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,803 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:55:38,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:55:38,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:55:38,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:55:38,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (1/1) ... [2024-11-19 01:55:38,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:55:38,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:38,837 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) [2024-11-19 01:55:38,838 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 [2024-11-19 01:55:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:55:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:55:38,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:55:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:55:38,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:55:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:55:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:55:38,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 01:55:38,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 01:55:38,871 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:55:38,953 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:55:38,954 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:55:39,153 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:55:39,153 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:55:39,292 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:55:39,292 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:55:39,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:55:39 BoogieIcfgContainer [2024-11-19 01:55:39,292 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:55:39,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:55:39,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:55:39,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:55:39,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:55:38" (1/3) ... [2024-11-19 01:55:39,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bbece8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:55:39, skipping insertion in model container [2024-11-19 01:55:39,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:55:38" (2/3) ... [2024-11-19 01:55:39,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bbece8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:55:39, skipping insertion in model container [2024-11-19 01:55:39,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:55:39" (3/3) ... [2024-11-19 01:55:39,306 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-19 01:55:39,320 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:55:39,321 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:55:39,321 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:55:39,357 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:55:39,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-19 01:55:39,406 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-19 01:55:39,407 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:55:39,409 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. [2024-11-19 01:55:39,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-19 01:55:39,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-19 01:55:39,423 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:55:39,430 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;@4f748102, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:55:39,431 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:55:39,439 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:55:39,440 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-19 01:55:39,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:55:39,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:39,441 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:39,441 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:39,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash 475305122, now seen corresponding path program 1 times [2024-11-19 01:55:39,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:39,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338003113] [2024-11-19 01:55:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:39,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:39,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:39,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338003113] [2024-11-19 01:55:39,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338003113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:39,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:39,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:55:39,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544408594] [2024-11-19 01:55:39,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:39,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:55:39,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:55:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:55:39,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:39,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:39,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:39,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:39,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:39,860 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-19 01:55:39,861 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 01:55:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-19 01:55:39,862 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-19 01:55:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-19 01:55:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:55:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:55:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-19 01:55:39,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-19 01:55:39,874 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-19 01:55:39,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-19 01:55:39,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:55:39,878 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-19 01:55:39,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-19 01:55:39,884 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-19 01:55:39,884 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-19 01:55:39,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:39,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:39,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:39,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:55:39,885 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:39,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 213829483, now seen corresponding path program 1 times [2024-11-19 01:55:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728075262] [2024-11-19 01:55:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:40,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:40,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728075262] [2024-11-19 01:55:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728075262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:40,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:40,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:55:40,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52491003] [2024-11-19 01:55:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:40,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:55:40,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:40,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:55:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:55:40,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:40,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:40,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:40,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:40,071 INFO L124 PetriNetUnfolderBase]: 69/126 cut-off events. [2024-11-19 01:55:40,071 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:55:40,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 126 events. 69/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 321 event pairs, 22 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 255. Up to 72 conditions per place. [2024-11-19 01:55:40,074 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 24 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2024-11-19 01:55:40,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 29 transitions, 131 flow [2024-11-19 01:55:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:55:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:55:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-19 01:55:40,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-19 01:55:40,077 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-11-19 01:55:40,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 29 transitions, 131 flow [2024-11-19 01:55:40,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 29 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:40,078 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2024-11-19 01:55:40,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2024-11-19 01:55:40,078 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2024-11-19 01:55:40,078 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2024-11-19 01:55:40,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:40,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:40,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:55:40,079 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:40,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2060278534, now seen corresponding path program 1 times [2024-11-19 01:55:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573700831] [2024-11-19 01:55:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:40,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:40,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573700831] [2024-11-19 01:55:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573700831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:40,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:40,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:55:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248168701] [2024-11-19 01:55:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:40,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:55:40,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:55:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:55:40,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:40,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:40,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:40,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:40,372 INFO L124 PetriNetUnfolderBase]: 86/167 cut-off events. [2024-11-19 01:55:40,372 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-19 01:55:40,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 167 events. 86/167 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 536 event pairs, 24 based on Foata normal form. 11/177 useless extension candidates. Maximal degree in co-relation 385. Up to 83 conditions per place. [2024-11-19 01:55:40,374 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 29 selfloop transitions, 7 changer transitions 10/47 dead transitions. [2024-11-19 01:55:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 47 transitions, 232 flow [2024-11-19 01:55:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:55:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:55:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-11-19 01:55:40,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-19 01:55:40,377 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 6 states and 63 transitions. [2024-11-19 01:55:40,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 47 transitions, 232 flow [2024-11-19 01:55:40,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:40,379 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 122 flow [2024-11-19 01:55:40,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-11-19 01:55:40,381 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2024-11-19 01:55:40,381 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 122 flow [2024-11-19 01:55:40,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:40,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:40,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:55:40,382 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:40,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -246905110, now seen corresponding path program 2 times [2024-11-19 01:55:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:40,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256317373] [2024-11-19 01:55:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:40,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:40,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:40,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:40,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256317373] [2024-11-19 01:55:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256317373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029846512] [2024-11-19 01:55:40,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:40,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:40,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:40,788 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) [2024-11-19 01:55:40,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:55:40,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:40,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:40,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:55:40,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:40,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029846512] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:40,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 01:55:40,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 11 [2024-11-19 01:55:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902744935] [2024-11-19 01:55:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:40,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:55:40,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:55:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:55:40,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:40,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:40,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:40,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:40,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:41,078 INFO L124 PetriNetUnfolderBase]: 84/161 cut-off events. [2024-11-19 01:55:41,079 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-19 01:55:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 161 events. 84/161 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 477 event pairs, 21 based on Foata normal form. 5/165 useless extension candidates. Maximal degree in co-relation 525. Up to 95 conditions per place. [2024-11-19 01:55:41,082 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 29 selfloop transitions, 6 changer transitions 3/39 dead transitions. [2024-11-19 01:55:41,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 255 flow [2024-11-19 01:55:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:41,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2024-11-19 01:55:41,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-19 01:55:41,084 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 122 flow. Second operand 4 states and 45 transitions. [2024-11-19 01:55:41,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 255 flow [2024-11-19 01:55:41,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 240 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 01:55:41,089 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 146 flow [2024-11-19 01:55:41,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-11-19 01:55:41,091 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2024-11-19 01:55:41,091 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 146 flow [2024-11-19 01:55:41,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:41,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:41,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:41,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:55:41,293 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 [2024-11-19 01:55:41,293 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:41,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1782267732, now seen corresponding path program 3 times [2024-11-19 01:55:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912801915] [2024-11-19 01:55:41,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:41,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:55:41,322 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:41,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:41,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912801915] [2024-11-19 01:55:41,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912801915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:41,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356148288] [2024-11-19 01:55:41,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:55:41,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:41,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:41,536 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) [2024-11-19 01:55:41,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:55:41,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:55:41,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:41,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:55:41,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:41,714 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:55:41,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356148288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:41,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:55:41,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2024-11-19 01:55:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460124693] [2024-11-19 01:55:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:41,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:55:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:55:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:55:41,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:41,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:41,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:41,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:41,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:42,076 INFO L124 PetriNetUnfolderBase]: 99/191 cut-off events. [2024-11-19 01:55:42,076 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-19 01:55:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 191 events. 99/191 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 585 event pairs, 36 based on Foata normal form. 2/192 useless extension candidates. Maximal degree in co-relation 662. Up to 118 conditions per place. [2024-11-19 01:55:42,080 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 28 selfloop transitions, 10 changer transitions 7/46 dead transitions. [2024-11-19 01:55:42,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 330 flow [2024-11-19 01:55:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:55:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:55:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2024-11-19 01:55:42,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-11-19 01:55:42,082 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 146 flow. Second operand 5 states and 51 transitions. [2024-11-19 01:55:42,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 330 flow [2024-11-19 01:55:42,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 320 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:42,086 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 210 flow [2024-11-19 01:55:42,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-11-19 01:55:42,087 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2024-11-19 01:55:42,088 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 210 flow [2024-11-19 01:55:42,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:42,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:42,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:42,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:55:42,292 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 [2024-11-19 01:55:42,293 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:42,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash -979409621, now seen corresponding path program 1 times [2024-11-19 01:55:42,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:42,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032186827] [2024-11-19 01:55:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:42,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:42,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032186827] [2024-11-19 01:55:42,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032186827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:42,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:42,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:55:42,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449324097] [2024-11-19 01:55:42,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:42,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:55:42,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:55:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:55:42,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:42,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:42,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:42,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:42,416 INFO L124 PetriNetUnfolderBase]: 97/184 cut-off events. [2024-11-19 01:55:42,416 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2024-11-19 01:55:42,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 184 events. 97/184 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 536 event pairs, 26 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 743. Up to 133 conditions per place. [2024-11-19 01:55:42,418 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 31 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2024-11-19 01:55:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 348 flow [2024-11-19 01:55:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-11-19 01:55:42,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-19 01:55:42,419 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 210 flow. Second operand 4 states and 43 transitions. [2024-11-19 01:55:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 348 flow [2024-11-19 01:55:42,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 328 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-19 01:55:42,422 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 232 flow [2024-11-19 01:55:42,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-11-19 01:55:42,422 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-11-19 01:55:42,423 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 232 flow [2024-11-19 01:55:42,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:42,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:42,423 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:42,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 01:55:42,423 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:42,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash -455360110, now seen corresponding path program 4 times [2024-11-19 01:55:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205446867] [2024-11-19 01:55:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:42,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:42,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205446867] [2024-11-19 01:55:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205446867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147739828] [2024-11-19 01:55:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:55:42,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:42,497 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) [2024-11-19 01:55:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:55:42,551 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:55:42,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:42,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:55:42,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:42,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147739828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:55:42,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:55:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2024-11-19 01:55:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235938556] [2024-11-19 01:55:42,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:55:42,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:55:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:55:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:55:42,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:42,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 232 flow. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:42,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:42,753 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2024-11-19 01:55:42,753 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2024-11-19 01:55:42,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 208 events. 111/208 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 650 event pairs, 25 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 851. Up to 115 conditions per place. [2024-11-19 01:55:42,755 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 39 selfloop transitions, 17 changer transitions 0/57 dead transitions. [2024-11-19 01:55:42,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 454 flow [2024-11-19 01:55:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:55:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:55:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-11-19 01:55:42,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-11-19 01:55:42,756 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 232 flow. Second operand 7 states and 69 transitions. [2024-11-19 01:55:42,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 454 flow [2024-11-19 01:55:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:55:42,759 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 296 flow [2024-11-19 01:55:42,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-11-19 01:55:42,760 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-11-19 01:55:42,760 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 296 flow [2024-11-19 01:55:42,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:42,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:42,760 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:42,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:55:42,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:42,961 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:42,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash -573043247, now seen corresponding path program 2 times [2024-11-19 01:55:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318347927] [2024-11-19 01:55:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:55:42,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:42,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:42,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:43,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318347927] [2024-11-19 01:55:43,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318347927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:43,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:43,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:55:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137915212] [2024-11-19 01:55:43,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:43,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:55:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:55:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:55:43,023 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:43,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:43,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:43,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:43,077 INFO L124 PetriNetUnfolderBase]: 112/204 cut-off events. [2024-11-19 01:55:43,078 INFO L125 PetriNetUnfolderBase]: For 752/752 co-relation queries the response was YES. [2024-11-19 01:55:43,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 204 events. 112/204 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 627 event pairs, 38 based on Foata normal form. 4/207 useless extension candidates. Maximal degree in co-relation 968. Up to 153 conditions per place. [2024-11-19 01:55:43,080 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 31 selfloop transitions, 12 changer transitions 2/46 dead transitions. [2024-11-19 01:55:43,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 448 flow [2024-11-19 01:55:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-11-19 01:55:43,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-19 01:55:43,081 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 296 flow. Second operand 4 states and 42 transitions. [2024-11-19 01:55:43,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 448 flow [2024-11-19 01:55:43,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 425 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 01:55:43,083 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 321 flow [2024-11-19 01:55:43,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-11-19 01:55:43,084 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2024-11-19 01:55:43,084 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 321 flow [2024-11-19 01:55:43,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:43,084 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:43,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 01:55:43,085 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:43,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1800701758, now seen corresponding path program 5 times [2024-11-19 01:55:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985125270] [2024-11-19 01:55:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:55:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:43,095 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:55:43,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:43,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:43,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985125270] [2024-11-19 01:55:43,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985125270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:43,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:43,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:55:43,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373911068] [2024-11-19 01:55:43,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:43,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:55:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:43,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:55:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:55:43,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:43,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:43,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:43,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:43,244 INFO L124 PetriNetUnfolderBase]: 105/192 cut-off events. [2024-11-19 01:55:43,245 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2024-11-19 01:55:43,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 192 events. 105/192 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 564 event pairs, 18 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 937. Up to 91 conditions per place. [2024-11-19 01:55:43,246 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 39 selfloop transitions, 19 changer transitions 1/60 dead transitions. [2024-11-19 01:55:43,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 589 flow [2024-11-19 01:55:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:55:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:55:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2024-11-19 01:55:43,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-19 01:55:43,248 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 321 flow. Second operand 6 states and 57 transitions. [2024-11-19 01:55:43,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 589 flow [2024-11-19 01:55:43,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 573 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-19 01:55:43,252 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 460 flow [2024-11-19 01:55:43,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-11-19 01:55:43,253 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-19 01:55:43,253 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 460 flow [2024-11-19 01:55:43,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:43,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:43,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:55:43,253 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:43,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash -922798556, now seen corresponding path program 6 times [2024-11-19 01:55:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171806413] [2024-11-19 01:55:43,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:55:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:43,266 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:55:43,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:55:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171806413] [2024-11-19 01:55:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171806413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:55:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:55:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 01:55:43,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267707707] [2024-11-19 01:55:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:55:43,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:55:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:55:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:55:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:55:43,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:55:43,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:55:43,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:55:43,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:55:43,364 INFO L124 PetriNetUnfolderBase]: 100/179 cut-off events. [2024-11-19 01:55:43,364 INFO L125 PetriNetUnfolderBase]: For 1043/1043 co-relation queries the response was YES. [2024-11-19 01:55:43,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 179 events. 100/179 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 520 event pairs, 26 based on Foata normal form. 5/183 useless extension candidates. Maximal degree in co-relation 992. Up to 127 conditions per place. [2024-11-19 01:55:43,366 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 30 selfloop transitions, 18 changer transitions 1/50 dead transitions. [2024-11-19 01:55:43,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 566 flow [2024-11-19 01:55:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:55:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:55:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-19 01:55:43,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-11-19 01:55:43,367 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 460 flow. Second operand 4 states and 41 transitions. [2024-11-19 01:55:43,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 566 flow [2024-11-19 01:55:43,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 544 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-11-19 01:55:43,370 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 440 flow [2024-11-19 01:55:43,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2024-11-19 01:55:43,372 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 36 predicate places. [2024-11-19 01:55:43,373 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 440 flow [2024-11-19 01:55:43,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:55:43,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:55:43,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:55:43,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 01:55:43,374 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:55:43,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:55:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash 121166544, now seen corresponding path program 1 times [2024-11-19 01:55:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:55:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906478969] [2024-11-19 01:55:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:43,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:55:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:55:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:55:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906478969] [2024-11-19 01:55:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906478969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:55:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187595706] [2024-11-19 01:55:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:55:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:55:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:55:43,667 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) [2024-11-19 01:55:43,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:55:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:55:43,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 01:55:43,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:55:43,767 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 [2024-11-19 01:55:43,865 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 01:55:43,866 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2024-11-19 01:55:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:55:43,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:55:44,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 116 [2024-11-19 01:55:44,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:55:44,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 526 treesize of output 454 [2024-11-19 01:56:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:56:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187595706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:03,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2024-11-19 01:56:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048181070] [2024-11-19 01:56:03,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:03,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:56:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:56:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:56:03,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:03,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 440 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:03,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:03,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:03,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:04,971 INFO L124 PetriNetUnfolderBase]: 331/600 cut-off events. [2024-11-19 01:56:04,971 INFO L125 PetriNetUnfolderBase]: For 3048/3048 co-relation queries the response was YES. [2024-11-19 01:56:04,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3273 conditions, 600 events. 331/600 cut-off events. For 3048/3048 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2618 event pairs, 10 based on Foata normal form. 10/608 useless extension candidates. Maximal degree in co-relation 2948. Up to 209 conditions per place. [2024-11-19 01:56:04,979 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 66 selfloop transitions, 28 changer transitions 90/185 dead transitions. [2024-11-19 01:56:04,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 185 transitions, 1975 flow [2024-11-19 01:56:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 01:56:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-19 01:56:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 211 transitions. [2024-11-19 01:56:04,982 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2024-11-19 01:56:04,982 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 440 flow. Second operand 24 states and 211 transitions. [2024-11-19 01:56:04,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 185 transitions, 1975 flow [2024-11-19 01:56:04,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 185 transitions, 1835 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 01:56:04,994 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 685 flow [2024-11-19 01:56:04,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=685, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2024-11-19 01:56:04,995 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2024-11-19 01:56:04,995 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 685 flow [2024-11-19 01:56:04,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:04,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:04,996 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:05,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:56:05,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:05,196 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:05,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1594862833, now seen corresponding path program 2 times [2024-11-19 01:56:05,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:05,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050547250] [2024-11-19 01:56:05,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:05,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:05,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:05,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:56:05,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050547250] [2024-11-19 01:56:05,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050547250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:05,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296631132] [2024-11-19 01:56:05,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:05,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:05,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:05,316 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) [2024-11-19 01:56:05,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:56:05,379 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:05,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:05,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 01:56:05,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:05,429 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 [2024-11-19 01:56:05,548 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-19 01:56:05,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-19 01:56:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:56:05,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:05,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2024-11-19 01:56:05,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:56:05,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 594 treesize of output 486 [2024-11-19 01:56:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:56:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296631132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:26,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-19 01:56:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97039168] [2024-11-19 01:56:26,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:26,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:56:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:56:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:56:26,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:26,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 685 flow. Second operand has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:26,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:26,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:27,230 INFO L124 PetriNetUnfolderBase]: 290/510 cut-off events. [2024-11-19 01:56:27,230 INFO L125 PetriNetUnfolderBase]: For 4300/4300 co-relation queries the response was YES. [2024-11-19 01:56:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 510 events. 290/510 cut-off events. For 4300/4300 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2016 event pairs, 5 based on Foata normal form. 37/547 useless extension candidates. Maximal degree in co-relation 3434. Up to 200 conditions per place. [2024-11-19 01:56:27,234 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 87 selfloop transitions, 64 changer transitions 1/153 dead transitions. [2024-11-19 01:56:27,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 153 transitions, 1989 flow [2024-11-19 01:56:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:56:27,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:56:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 157 transitions. [2024-11-19 01:56:27,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4131578947368421 [2024-11-19 01:56:27,235 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 685 flow. Second operand 19 states and 157 transitions. [2024-11-19 01:56:27,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 153 transitions, 1989 flow [2024-11-19 01:56:27,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 153 transitions, 1725 flow, removed 105 selfloop flow, removed 12 redundant places. [2024-11-19 01:56:27,248 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 1304 flow [2024-11-19 01:56:27,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1304, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-11-19 01:56:27,249 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 68 predicate places. [2024-11-19 01:56:27,249 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 1304 flow [2024-11-19 01:56:27,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.9411764705882355) internal successors, (101), 17 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:27,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:27,250 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:27,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:27,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 01:56:27,452 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:27,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:27,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1178291748, now seen corresponding path program 3 times [2024-11-19 01:56:27,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:27,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647932544] [2024-11-19 01:56:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:27,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:27,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:56:27,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:56:27,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647932544] [2024-11-19 01:56:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647932544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987069045] [2024-11-19 01:56:27,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:27,610 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) [2024-11-19 01:56:27,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:56:27,783 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:56:27,783 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:27,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:56:27,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:56:27,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:56:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987069045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:27,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 01:56:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430601000] [2024-11-19 01:56:27,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:27,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:56:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:56:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:56:27,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:27,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 1304 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:27,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:27,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:27,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:28,575 INFO L124 PetriNetUnfolderBase]: 401/698 cut-off events. [2024-11-19 01:56:28,576 INFO L125 PetriNetUnfolderBase]: For 7185/7185 co-relation queries the response was YES. [2024-11-19 01:56:28,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5071 conditions, 698 events. 401/698 cut-off events. For 7185/7185 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2919 event pairs, 20 based on Foata normal form. 72/770 useless extension candidates. Maximal degree in co-relation 4779. Up to 302 conditions per place. [2024-11-19 01:56:28,581 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 130 selfloop transitions, 45 changer transitions 0/176 dead transitions. [2024-11-19 01:56:28,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 176 transitions, 2593 flow [2024-11-19 01:56:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:56:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:56:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-11-19 01:56:28,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-19 01:56:28,582 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 1304 flow. Second operand 11 states and 108 transitions. [2024-11-19 01:56:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 176 transitions, 2593 flow [2024-11-19 01:56:28,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 2356 flow, removed 89 selfloop flow, removed 10 redundant places. [2024-11-19 01:56:28,597 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 1390 flow [2024-11-19 01:56:28,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1390, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-11-19 01:56:28,598 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-19 01:56:28,598 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 1390 flow [2024-11-19 01:56:28,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:28,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:28,599 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:28,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:56:28,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:28,800 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:28,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1831800103, now seen corresponding path program 4 times [2024-11-19 01:56:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46335471] [2024-11-19 01:56:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:56:28,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:28,832 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:56:28,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:56:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46335471] [2024-11-19 01:56:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46335471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61424421] [2024-11-19 01:56:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:56:29,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:29,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:29,885 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) [2024-11-19 01:56:29,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:56:29,940 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:56:29,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:29,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 01:56:29,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:30,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:56:30,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2024-11-19 01:56:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:56:30,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:30,180 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-19 01:56:30,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-19 01:56:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 01:56:30,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61424421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:30,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:30,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 17 [2024-11-19 01:56:30,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616557384] [2024-11-19 01:56:30,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:30,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:56:30,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:56:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:56:30,307 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:30,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 1390 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:30,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:30,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:30,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:30,950 INFO L124 PetriNetUnfolderBase]: 701/1234 cut-off events. [2024-11-19 01:56:30,951 INFO L125 PetriNetUnfolderBase]: For 13316/13316 co-relation queries the response was YES. [2024-11-19 01:56:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9248 conditions, 1234 events. 701/1234 cut-off events. For 13316/13316 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5658 event pairs, 52 based on Foata normal form. 4/1238 useless extension candidates. Maximal degree in co-relation 9200. Up to 612 conditions per place. [2024-11-19 01:56:30,960 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 135 selfloop transitions, 88 changer transitions 2/226 dead transitions. [2024-11-19 01:56:30,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 226 transitions, 3301 flow [2024-11-19 01:56:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:56:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:56:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 180 transitions. [2024-11-19 01:56:30,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-19 01:56:30,966 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 1390 flow. Second operand 20 states and 180 transitions. [2024-11-19 01:56:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 226 transitions, 3301 flow [2024-11-19 01:56:30,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 226 transitions, 3165 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-11-19 01:56:30,990 INFO L231 Difference]: Finished difference. Result has 112 places, 155 transitions, 2404 flow [2024-11-19 01:56:30,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2404, PETRI_PLACES=112, PETRI_TRANSITIONS=155} [2024-11-19 01:56:30,993 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 91 predicate places. [2024-11-19 01:56:30,994 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 155 transitions, 2404 flow [2024-11-19 01:56:30,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:30,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:30,994 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:31,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:31,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:31,195 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:31,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1578839469, now seen corresponding path program 5 times [2024-11-19 01:56:31,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592317417] [2024-11-19 01:56:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:56:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:31,214 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:56:31,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592317417] [2024-11-19 01:56:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592317417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442836098] [2024-11-19 01:56:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:56:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:31,389 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) [2024-11-19 01:56:31,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:56:31,471 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:56:31,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:31,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 01:56:31,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:31,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:56:31,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2024-11-19 01:56:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:56:31,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:31,753 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-19 01:56:31,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-19 01:56:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:31,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442836098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:31,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:31,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-11-19 01:56:31,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13855073] [2024-11-19 01:56:31,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:31,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:56:31,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:56:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:56:31,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:31,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 155 transitions, 2404 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:31,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:31,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:32,364 INFO L124 PetriNetUnfolderBase]: 815/1440 cut-off events. [2024-11-19 01:56:32,364 INFO L125 PetriNetUnfolderBase]: For 15909/15909 co-relation queries the response was YES. [2024-11-19 01:56:32,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11209 conditions, 1440 events. 815/1440 cut-off events. For 15909/15909 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6734 event pairs, 125 based on Foata normal form. 3/1443 useless extension candidates. Maximal degree in co-relation 11154. Up to 1143 conditions per place. [2024-11-19 01:56:32,376 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 155 selfloop transitions, 50 changer transitions 1/207 dead transitions. [2024-11-19 01:56:32,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 3411 flow [2024-11-19 01:56:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:56:32,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:56:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-11-19 01:56:32,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-11-19 01:56:32,377 INFO L175 Difference]: Start difference. First operand has 112 places, 155 transitions, 2404 flow. Second operand 11 states and 103 transitions. [2024-11-19 01:56:32,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 3411 flow [2024-11-19 01:56:32,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 207 transitions, 2968 flow, removed 203 selfloop flow, removed 7 redundant places. [2024-11-19 01:56:32,405 INFO L231 Difference]: Finished difference. Result has 119 places, 173 transitions, 2470 flow [2024-11-19 01:56:32,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2470, PETRI_PLACES=119, PETRI_TRANSITIONS=173} [2024-11-19 01:56:32,406 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2024-11-19 01:56:32,406 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 173 transitions, 2470 flow [2024-11-19 01:56:32,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:32,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:32,406 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:32,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:32,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:56:32,607 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:32,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1263049607, now seen corresponding path program 6 times [2024-11-19 01:56:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:32,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531808793] [2024-11-19 01:56:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:56:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:32,622 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:56:32,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:56:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531808793] [2024-11-19 01:56:33,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531808793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989908577] [2024-11-19 01:56:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:56:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:33,196 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) [2024-11-19 01:56:33,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:56:33,257 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:56:33,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:33,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 01:56:33,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:33,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 01:56:33,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-19 01:56:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:56:33,388 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:33,532 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-19 01:56:33,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-19 01:56:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989908577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:33,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:33,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 18 [2024-11-19 01:56:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372906496] [2024-11-19 01:56:33,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:33,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:56:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:56:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:56:33,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:33,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 173 transitions, 2470 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:33,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:33,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:33,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:34,391 INFO L124 PetriNetUnfolderBase]: 1341/2374 cut-off events. [2024-11-19 01:56:34,392 INFO L125 PetriNetUnfolderBase]: For 24521/24521 co-relation queries the response was YES. [2024-11-19 01:56:34,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17411 conditions, 2374 events. 1341/2374 cut-off events. For 24521/24521 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12889 event pairs, 181 based on Foata normal form. 5/2379 useless extension candidates. Maximal degree in co-relation 17352. Up to 1383 conditions per place. [2024-11-19 01:56:34,415 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 209 selfloop transitions, 103 changer transitions 2/315 dead transitions. [2024-11-19 01:56:34,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 315 transitions, 4997 flow [2024-11-19 01:56:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:56:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:56:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-11-19 01:56:34,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-19 01:56:34,417 INFO L175 Difference]: Start difference. First operand has 119 places, 173 transitions, 2470 flow. Second operand 20 states and 170 transitions. [2024-11-19 01:56:34,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 315 transitions, 4997 flow [2024-11-19 01:56:34,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 315 transitions, 4790 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-11-19 01:56:34,474 INFO L231 Difference]: Finished difference. Result has 139 places, 251 transitions, 3981 flow [2024-11-19 01:56:34,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3981, PETRI_PLACES=139, PETRI_TRANSITIONS=251} [2024-11-19 01:56:34,475 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2024-11-19 01:56:34,475 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 251 transitions, 3981 flow [2024-11-19 01:56:34,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:34,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:34,477 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:34,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:56:34,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 01:56:34,677 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:34,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:34,678 INFO L85 PathProgramCache]: Analyzing trace with hash -446663319, now seen corresponding path program 7 times [2024-11-19 01:56:34,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:34,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582598381] [2024-11-19 01:56:34,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:56:34,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:56:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:34,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:34,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582598381] [2024-11-19 01:56:34,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582598381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:34,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819910496] [2024-11-19 01:56:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:56:34,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:34,819 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) [2024-11-19 01:56:34,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:56:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:56:34,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:34,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:34,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:35,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819910496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:35,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:35,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-19 01:56:35,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572130328] [2024-11-19 01:56:35,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:35,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:56:35,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:56:35,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:56:35,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:35,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 251 transitions, 3981 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:35,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:35,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:35,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:36,112 INFO L124 PetriNetUnfolderBase]: 1529/2938 cut-off events. [2024-11-19 01:56:36,113 INFO L125 PetriNetUnfolderBase]: For 37590/37590 co-relation queries the response was YES. [2024-11-19 01:56:36,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22014 conditions, 2938 events. 1529/2938 cut-off events. For 37590/37590 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18615 event pairs, 167 based on Foata normal form. 16/2954 useless extension candidates. Maximal degree in co-relation 21949. Up to 1220 conditions per place. [2024-11-19 01:56:36,134 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 329 selfloop transitions, 275 changer transitions 0/605 dead transitions. [2024-11-19 01:56:36,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 605 transitions, 10600 flow [2024-11-19 01:56:36,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 01:56:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 01:56:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 257 transitions. [2024-11-19 01:56:36,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4015625 [2024-11-19 01:56:36,136 INFO L175 Difference]: Start difference. First operand has 139 places, 251 transitions, 3981 flow. Second operand 32 states and 257 transitions. [2024-11-19 01:56:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 605 transitions, 10600 flow [2024-11-19 01:56:36,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 605 transitions, 9285 flow, removed 636 selfloop flow, removed 8 redundant places. [2024-11-19 01:56:36,234 INFO L231 Difference]: Finished difference. Result has 174 places, 441 transitions, 7187 flow [2024-11-19 01:56:36,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=7187, PETRI_PLACES=174, PETRI_TRANSITIONS=441} [2024-11-19 01:56:36,235 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 153 predicate places. [2024-11-19 01:56:36,235 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 441 transitions, 7187 flow [2024-11-19 01:56:36,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:36,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:36,235 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:36,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:36,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:56:36,436 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:36,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:36,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1680085765, now seen corresponding path program 8 times [2024-11-19 01:56:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:36,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275705768] [2024-11-19 01:56:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:36,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:36,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275705768] [2024-11-19 01:56:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275705768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357444187] [2024-11-19 01:56:36,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:56:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:36,551 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) [2024-11-19 01:56:36,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:56:36,614 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:56:36,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:36,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:36,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:36,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357444187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:36,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:36,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-19 01:56:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379432200] [2024-11-19 01:56:36,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:36,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:56:36,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:56:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:56:36,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:36,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 441 transitions, 7187 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:36,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:36,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:36,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:37,581 INFO L124 PetriNetUnfolderBase]: 1525/3030 cut-off events. [2024-11-19 01:56:37,582 INFO L125 PetriNetUnfolderBase]: For 42385/42385 co-relation queries the response was YES. [2024-11-19 01:56:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22977 conditions, 3030 events. 1525/3030 cut-off events. For 42385/42385 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 20175 event pairs, 151 based on Foata normal form. 36/3066 useless extension candidates. Maximal degree in co-relation 22903. Up to 1184 conditions per place. [2024-11-19 01:56:37,605 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 369 selfloop transitions, 215 changer transitions 6/591 dead transitions. [2024-11-19 01:56:37,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 591 transitions, 10381 flow [2024-11-19 01:56:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:56:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:56:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 133 transitions. [2024-11-19 01:56:37,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-11-19 01:56:37,606 INFO L175 Difference]: Start difference. First operand has 174 places, 441 transitions, 7187 flow. Second operand 16 states and 133 transitions. [2024-11-19 01:56:37,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 591 transitions, 10381 flow [2024-11-19 01:56:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 591 transitions, 9277 flow, removed 438 selfloop flow, removed 5 redundant places. [2024-11-19 01:56:37,832 INFO L231 Difference]: Finished difference. Result has 188 places, 463 transitions, 7060 flow [2024-11-19 01:56:37,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7060, PETRI_PLACES=188, PETRI_TRANSITIONS=463} [2024-11-19 01:56:37,833 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2024-11-19 01:56:37,833 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 463 transitions, 7060 flow [2024-11-19 01:56:37,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:37,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:37,833 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:37,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:38,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 01:56:38,034 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:38,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash -223713845, now seen corresponding path program 9 times [2024-11-19 01:56:38,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:38,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187791435] [2024-11-19 01:56:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:38,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:38,054 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:56:38,055 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:38,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187791435] [2024-11-19 01:56:38,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187791435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:38,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159809661] [2024-11-19 01:56:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:56:38,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:38,249 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) [2024-11-19 01:56:38,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:56:38,332 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:56:38,333 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:38,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:38,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:38,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159809661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:38,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:38,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-19 01:56:38,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209951272] [2024-11-19 01:56:38,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:38,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 01:56:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 01:56:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-11-19 01:56:38,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:38,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 463 transitions, 7060 flow. Second operand has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:38,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:38,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:43,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 01:56:48,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 01:56:48,604 INFO L124 PetriNetUnfolderBase]: 1615/3193 cut-off events. [2024-11-19 01:56:48,604 INFO L125 PetriNetUnfolderBase]: For 48245/48245 co-relation queries the response was YES. [2024-11-19 01:56:48,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24632 conditions, 3193 events. 1615/3193 cut-off events. For 48245/48245 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21424 event pairs, 311 based on Foata normal form. 20/3213 useless extension candidates. Maximal degree in co-relation 24553. Up to 1292 conditions per place. [2024-11-19 01:56:48,628 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 273 selfloop transitions, 371 changer transitions 0/645 dead transitions. [2024-11-19 01:56:48,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 645 transitions, 11340 flow [2024-11-19 01:56:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 01:56:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-19 01:56:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 203 transitions. [2024-11-19 01:56:48,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2024-11-19 01:56:48,629 INFO L175 Difference]: Start difference. First operand has 188 places, 463 transitions, 7060 flow. Second operand 24 states and 203 transitions. [2024-11-19 01:56:48,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 645 transitions, 11340 flow [2024-11-19 01:56:48,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 645 transitions, 9892 flow, removed 362 selfloop flow, removed 16 redundant places. [2024-11-19 01:56:48,813 INFO L231 Difference]: Finished difference. Result has 207 places, 541 transitions, 8746 flow [2024-11-19 01:56:48,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5971, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8746, PETRI_PLACES=207, PETRI_TRANSITIONS=541} [2024-11-19 01:56:48,814 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2024-11-19 01:56:48,814 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 541 transitions, 8746 flow [2024-11-19 01:56:48,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.666666666666667) internal successors, (112), 24 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:48,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:48,814 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:48,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 01:56:49,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:49,016 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:49,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -614207011, now seen corresponding path program 10 times [2024-11-19 01:56:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111046504] [2024-11-19 01:56:49,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:56:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:49,033 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:56:49,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:49,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111046504] [2024-11-19 01:56:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111046504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100724416] [2024-11-19 01:56:49,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:56:49,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:49,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:49,124 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) [2024-11-19 01:56:49,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:56:49,183 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:56:49,183 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:49,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:49,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:49,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100724416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:49,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:49,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-19 01:56:49,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998648680] [2024-11-19 01:56:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:49,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:56:49,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:56:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:56:49,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:49,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 541 transitions, 8746 flow. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:49,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:50,960 INFO L124 PetriNetUnfolderBase]: 1760/3491 cut-off events. [2024-11-19 01:56:50,960 INFO L125 PetriNetUnfolderBase]: For 45739/45739 co-relation queries the response was YES. [2024-11-19 01:56:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26315 conditions, 3491 events. 1760/3491 cut-off events. For 45739/45739 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24091 event pairs, 269 based on Foata normal form. 19/3510 useless extension candidates. Maximal degree in co-relation 26232. Up to 1259 conditions per place. [2024-11-19 01:56:50,985 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 427 selfloop transitions, 318 changer transitions 11/757 dead transitions. [2024-11-19 01:56:50,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 757 transitions, 13503 flow [2024-11-19 01:56:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-19 01:56:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-19 01:56:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 311 transitions. [2024-11-19 01:56:50,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37023809523809526 [2024-11-19 01:56:50,987 INFO L175 Difference]: Start difference. First operand has 207 places, 541 transitions, 8746 flow. Second operand 42 states and 311 transitions. [2024-11-19 01:56:50,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 757 transitions, 13503 flow [2024-11-19 01:56:51,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 757 transitions, 12418 flow, removed 414 selfloop flow, removed 5 redundant places. [2024-11-19 01:56:51,259 INFO L231 Difference]: Finished difference. Result has 258 places, 616 transitions, 10437 flow [2024-11-19 01:56:51,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7886, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10437, PETRI_PLACES=258, PETRI_TRANSITIONS=616} [2024-11-19 01:56:51,260 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 237 predicate places. [2024-11-19 01:56:51,260 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 616 transitions, 10437 flow [2024-11-19 01:56:51,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:51,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:51,260 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:51,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 01:56:51,460 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,SelfDestructingSolverStorable19 [2024-11-19 01:56:51,461 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:51,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1797290589, now seen corresponding path program 11 times [2024-11-19 01:56:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:51,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082528789] [2024-11-19 01:56:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:56:51,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:51,479 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:56:51,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082528789] [2024-11-19 01:56:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082528789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811501828] [2024-11-19 01:56:51,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:56:51,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:51,669 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) [2024-11-19 01:56:51,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:56:51,958 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:56:51,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:51,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:51,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:52,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811501828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:52,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:52,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-19 01:56:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736805049] [2024-11-19 01:56:52,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:52,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 01:56:52,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 01:56:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-19 01:56:52,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:52,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 616 transitions, 10437 flow. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2024-11-19 01:56:52,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:52,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:52,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:56:55,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 01:56:58,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 01:56:58,719 INFO L124 PetriNetUnfolderBase]: 1828/3643 cut-off events. [2024-11-19 01:56:58,719 INFO L125 PetriNetUnfolderBase]: For 52349/52349 co-relation queries the response was YES. [2024-11-19 01:56:58,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28232 conditions, 3643 events. 1828/3643 cut-off events. For 52349/52349 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25555 event pairs, 275 based on Foata normal form. 10/3653 useless extension candidates. Maximal degree in co-relation 28135. Up to 1291 conditions per place. [2024-11-19 01:56:58,750 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 437 selfloop transitions, 343 changer transitions 0/781 dead transitions. [2024-11-19 01:56:58,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 781 transitions, 14069 flow [2024-11-19 01:56:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-19 01:56:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-19 01:56:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 246 transitions. [2024-11-19 01:56:58,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36176470588235293 [2024-11-19 01:56:58,809 INFO L175 Difference]: Start difference. First operand has 258 places, 616 transitions, 10437 flow. Second operand 34 states and 246 transitions. [2024-11-19 01:56:58,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 781 transitions, 14069 flow [2024-11-19 01:56:59,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 781 transitions, 12937 flow, removed 475 selfloop flow, removed 11 redundant places. [2024-11-19 01:56:59,114 INFO L231 Difference]: Finished difference. Result has 289 places, 659 transitions, 11083 flow [2024-11-19 01:56:59,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9319, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11083, PETRI_PLACES=289, PETRI_TRANSITIONS=659} [2024-11-19 01:56:59,114 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2024-11-19 01:56:59,115 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 659 transitions, 11083 flow [2024-11-19 01:56:59,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 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) [2024-11-19 01:56:59,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:56:59,115 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:56:59,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:56:59,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:59,315 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:56:59,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:56:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1938436877, now seen corresponding path program 12 times [2024-11-19 01:56:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:56:59,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944063662] [2024-11-19 01:56:59,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:56:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:56:59,332 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:56:59,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:59,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:56:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944063662] [2024-11-19 01:56:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944063662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:56:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899646979] [2024-11-19 01:56:59,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:56:59,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:56:59,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:56:59,453 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) [2024-11-19 01:56:59,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:56:59,524 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-19 01:56:59,525 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:56:59,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:56:59,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:56:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:59,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:56:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:56:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899646979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:56:59,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:56:59,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-19 01:56:59,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420660414] [2024-11-19 01:56:59,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:56:59,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:56:59,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:56:59,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:56:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-19 01:56:59,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:56:59,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 659 transitions, 11083 flow. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:56:59,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:56:59,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:56:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:01,079 INFO L124 PetriNetUnfolderBase]: 1929/3789 cut-off events. [2024-11-19 01:57:01,079 INFO L125 PetriNetUnfolderBase]: For 60135/60135 co-relation queries the response was YES. [2024-11-19 01:57:01,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30903 conditions, 3789 events. 1929/3789 cut-off events. For 60135/60135 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26279 event pairs, 673 based on Foata normal form. 24/3813 useless extension candidates. Maximal degree in co-relation 30796. Up to 2901 conditions per place. [2024-11-19 01:57:01,115 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 539 selfloop transitions, 243 changer transitions 0/783 dead transitions. [2024-11-19 01:57:01,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 783 transitions, 14513 flow [2024-11-19 01:57:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 01:57:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-19 01:57:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 249 transitions. [2024-11-19 01:57:01,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3557142857142857 [2024-11-19 01:57:01,116 INFO L175 Difference]: Start difference. First operand has 289 places, 659 transitions, 11083 flow. Second operand 35 states and 249 transitions. [2024-11-19 01:57:01,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 783 transitions, 14513 flow [2024-11-19 01:57:01,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 783 transitions, 13986 flow, removed 183 selfloop flow, removed 14 redundant places. [2024-11-19 01:57:01,491 INFO L231 Difference]: Finished difference. Result has 318 places, 711 transitions, 12153 flow [2024-11-19 01:57:01,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10507, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12153, PETRI_PLACES=318, PETRI_TRANSITIONS=711} [2024-11-19 01:57:01,491 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2024-11-19 01:57:01,491 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 711 transitions, 12153 flow [2024-11-19 01:57:01,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:01,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:01,492 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:01,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 01:57:01,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:01,692 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:01,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1015956509, now seen corresponding path program 13 times [2024-11-19 01:57:01,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:01,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969298378] [2024-11-19 01:57:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:57:01,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:01,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969298378] [2024-11-19 01:57:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969298378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578910583] [2024-11-19 01:57:01,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:57:01,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:01,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:01,840 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) [2024-11-19 01:57:01,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:57:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:01,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:57:01,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:01,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578910583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:02,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-19 01:57:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821059379] [2024-11-19 01:57:02,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:02,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:57:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:57:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:57:02,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:57:02,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 711 transitions, 12153 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2024-11-19 01:57:02,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:02,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:57:02,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:03,580 INFO L124 PetriNetUnfolderBase]: 2020/3971 cut-off events. [2024-11-19 01:57:03,580 INFO L125 PetriNetUnfolderBase]: For 67865/67865 co-relation queries the response was YES. [2024-11-19 01:57:03,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33450 conditions, 3971 events. 2020/3971 cut-off events. For 67865/67865 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27884 event pairs, 669 based on Foata normal form. 4/3975 useless extension candidates. Maximal degree in co-relation 33336. Up to 2935 conditions per place. [2024-11-19 01:57:03,619 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 532 selfloop transitions, 294 changer transitions 0/827 dead transitions. [2024-11-19 01:57:03,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 827 transitions, 15748 flow [2024-11-19 01:57:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 01:57:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 01:57:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 241 transitions. [2024-11-19 01:57:03,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3765625 [2024-11-19 01:57:03,620 INFO L175 Difference]: Start difference. First operand has 318 places, 711 transitions, 12153 flow. Second operand 32 states and 241 transitions. [2024-11-19 01:57:03,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 827 transitions, 15748 flow [2024-11-19 01:57:04,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 827 transitions, 15263 flow, removed 150 selfloop flow, removed 11 redundant places. [2024-11-19 01:57:04,149 INFO L231 Difference]: Finished difference. Result has 345 places, 760 transitions, 13573 flow [2024-11-19 01:57:04,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11698, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13573, PETRI_PLACES=345, PETRI_TRANSITIONS=760} [2024-11-19 01:57:04,149 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2024-11-19 01:57:04,149 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 760 transitions, 13573 flow [2024-11-19 01:57:04,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 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) [2024-11-19 01:57:04,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:04,150 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 01:57:04,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 01:57:04,351 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:04,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1945140591, now seen corresponding path program 14 times [2024-11-19 01:57:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:04,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718707799] [2024-11-19 01:57:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:57:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:04,368 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:57:04,368 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:57:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:04,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718707799] [2024-11-19 01:57:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718707799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935745820] [2024-11-19 01:57:04,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:57:04,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:04,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:04,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 01:57:04,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:57:04,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:57:04,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:57:04,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:04,607 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:04,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935745820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:04,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:04,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-19 01:57:04,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324760425] [2024-11-19 01:57:04,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:04,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 01:57:04,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:04,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 01:57:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-19 01:57:04,706 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:57:04,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 760 transitions, 13573 flow. Second operand has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:04,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:04,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:57:04,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:06,258 INFO L124 PetriNetUnfolderBase]: 2188/4283 cut-off events. [2024-11-19 01:57:06,258 INFO L125 PetriNetUnfolderBase]: For 82111/82111 co-relation queries the response was YES. [2024-11-19 01:57:06,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37225 conditions, 4283 events. 2188/4283 cut-off events. For 82111/82111 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30492 event pairs, 802 based on Foata normal form. 36/4319 useless extension candidates. Maximal degree in co-relation 37104. Up to 3485 conditions per place. [2024-11-19 01:57:06,300 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 703 selfloop transitions, 221 changer transitions 0/925 dead transitions. [2024-11-19 01:57:06,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 925 transitions, 18417 flow [2024-11-19 01:57:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 01:57:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-19 01:57:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 256 transitions. [2024-11-19 01:57:06,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-11-19 01:57:06,301 INFO L175 Difference]: Start difference. First operand has 345 places, 760 transitions, 13573 flow. Second operand 36 states and 256 transitions. [2024-11-19 01:57:06,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 925 transitions, 18417 flow [2024-11-19 01:57:06,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 925 transitions, 17902 flow, removed 198 selfloop flow, removed 14 redundant places. [2024-11-19 01:57:06,949 INFO L231 Difference]: Finished difference. Result has 378 places, 838 transitions, 15407 flow [2024-11-19 01:57:06,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13076, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15407, PETRI_PLACES=378, PETRI_TRANSITIONS=838} [2024-11-19 01:57:06,949 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2024-11-19 01:57:06,950 INFO L471 AbstractCegarLoop]: Abstraction has has 378 places, 838 transitions, 15407 flow [2024-11-19 01:57:06,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:06,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:06,950 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:06,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 01:57:07,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:07,150 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:07,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 348989737, now seen corresponding path program 15 times [2024-11-19 01:57:07,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:07,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808289297] [2024-11-19 01:57:07,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:57:07,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:07,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:57:07,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:57:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808289297] [2024-11-19 01:57:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808289297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753547919] [2024-11-19 01:57:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:57:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:07,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:07,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 01:57:07,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:57:07,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:57:07,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 01:57:07,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:07,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:57:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753547919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:07,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-19 01:57:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693326410] [2024-11-19 01:57:07,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:07,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:57:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:57:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:57:07,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-19 01:57:07,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 838 transitions, 15407 flow. Second operand has 19 states, 19 states have (on average 4.684210526315789) internal successors, (89), 19 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:07,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:07,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-19 01:57:07,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand