./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/clever.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 f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:29:11,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:29:11,407 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:29:11,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:29:11,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:29:11,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:29:11,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:29:11,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:29:11,439 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:29:11,442 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:29:11,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:29:11,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:29:11,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:29:11,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:29:11,444 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:29:11,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:29:11,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:29:11,445 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:29:11,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:29:11,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:29:11,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:29:11,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:29:11,447 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:29:11,448 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:29:11,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:29:11,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:29:11,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:29:11,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:11,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:29:11,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:29:11,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:29:11,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:29:11,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:29:11,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:29:11,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:29:11,451 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:29:11,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:29:11,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:29:11,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-01-27 15:29:11,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:29:11,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:29:11,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:29:11,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:29:11,686 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:29:11,687 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2024-01-27 15:29:12,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:29:12,893 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:29:12,894 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2024-01-27 15:29:12,902 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5946c88e2/6c51111d446d4ec096baefcb8801f622/FLAGd43d1bc26 [2024-01-27 15:29:12,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5946c88e2/6c51111d446d4ec096baefcb8801f622 [2024-01-27 15:29:12,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:29:12,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:29:12,919 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:12,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:29:12,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:29:12,923 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:12" (1/1) ... [2024-01-27 15:29:12,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efed2c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:12, skipping insertion in model container [2024-01-27 15:29:12,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:29:12" (1/1) ... [2024-01-27 15:29:12,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:29:13,070 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2024-01-27 15:29:13,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:13,079 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:29:13,094 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2024-01-27 15:29:13,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:29:13,105 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:29:13,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13 WrapperNode [2024-01-27 15:29:13,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:29:13,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:13,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:29:13,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:29:13,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,133 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2024-01-27 15:29:13,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:29:13,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:29:13,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:29:13,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:29:13,143 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,174 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:29:13,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,195 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:29:13,197 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:29:13,197 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:29:13,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:29:13,198 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (1/1) ... [2024-01-27 15:29:13,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:29:13,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:13,223 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) [2024-01-27 15:29:13,226 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 [2024-01-27 15:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:29:13,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:29:13,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:29:13,268 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:29:13,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:29:13,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:29:13,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:29:13,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:29:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:29:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:29:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:29:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:29:13,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:29:13,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:29:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:29:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:29:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:29:13,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:29:13,273 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:29:13,400 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:29:13,402 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:29:13,666 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:29:13,676 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:29:13,851 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:29:13,851 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:29:13,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:13 BoogieIcfgContainer [2024-01-27 15:29:13,852 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:29:13,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:29:13,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:29:13,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:29:13,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:29:12" (1/3) ... [2024-01-27 15:29:13,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569bcf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:13, skipping insertion in model container [2024-01-27 15:29:13,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:29:13" (2/3) ... [2024-01-27 15:29:13,857 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569bcf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:29:13, skipping insertion in model container [2024-01-27 15:29:13,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:29:13" (3/3) ... [2024-01-27 15:29:13,858 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-01-27 15:29:13,863 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:29:13,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:29:13,871 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:29:13,871 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:29:13,907 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:29:13,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:29:13,970 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-27 15:29:13,970 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:29:13,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-01-27 15:29:13,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-27 15:29:13,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-27 15:29:13,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:29:13,993 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f350561, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:29:13,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:29:14,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:29:14,003 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-27 15:29:14,003 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:29:14,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:14,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:14,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:14,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1860028167, now seen corresponding path program 1 times [2024-01-27 15:29:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824085396] [2024-01-27 15:29:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824085396] [2024-01-27 15:29:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824085396] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:14,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:14,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:29:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105399654] [2024-01-27 15:29:14,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:14,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:29:14,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:29:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:29:14,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:14,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:14,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:14,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:14,529 INFO L124 PetriNetUnfolderBase]: 112/182 cut-off events. [2024-01-27 15:29:14,529 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-27 15:29:14,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 182 events. 112/182 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 556 event pairs, 20 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 318. Up to 118 conditions per place. [2024-01-27 15:29:14,532 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 23 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2024-01-27 15:29:14,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 135 flow [2024-01-27 15:29:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:29:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:29:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-01-27 15:29:14,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2024-01-27 15:29:14,543 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 43 transitions. [2024-01-27 15:29:14,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 135 flow [2024-01-27 15:29:14,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:29:14,548 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2024-01-27 15:29:14,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2024-01-27 15:29:14,553 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-27 15:29:14,553 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2024-01-27 15:29:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:29:14,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:14,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1746752640, now seen corresponding path program 1 times [2024-01-27 15:29:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129234923] [2024-01-27 15:29:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:14,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129234923] [2024-01-27 15:29:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129234923] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:14,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:14,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:29:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237860446] [2024-01-27 15:29:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:14,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:14,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:14,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:14,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:14,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:14,762 INFO L124 PetriNetUnfolderBase]: 153/259 cut-off events. [2024-01-27 15:29:14,762 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-01-27 15:29:14,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 259 events. 153/259 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 885 event pairs, 14 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 184. Up to 102 conditions per place. [2024-01-27 15:29:14,765 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 40 selfloop transitions, 7 changer transitions 2/52 dead transitions. [2024-01-27 15:29:14,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 52 transitions, 248 flow [2024-01-27 15:29:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2024-01-27 15:29:14,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-01-27 15:29:14,768 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 5 states and 69 transitions. [2024-01-27 15:29:14,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 52 transitions, 248 flow [2024-01-27 15:29:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 52 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:14,772 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 107 flow [2024-01-27 15:29:14,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2024-01-27 15:29:14,773 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-01-27 15:29:14,773 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 107 flow [2024-01-27 15:29:14,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:14,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:14,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:29:14,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:14,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1243436406, now seen corresponding path program 2 times [2024-01-27 15:29:14,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535976728] [2024-01-27 15:29:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535976728] [2024-01-27 15:29:14,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535976728] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:14,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:14,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:29:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470222031] [2024-01-27 15:29:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:14,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:14,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:14,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:14,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:14,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:14,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:14,967 INFO L124 PetriNetUnfolderBase]: 153/252 cut-off events. [2024-01-27 15:29:14,967 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-01-27 15:29:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 252 events. 153/252 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 828 event pairs, 17 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 320. Up to 114 conditions per place. [2024-01-27 15:29:14,972 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 32 selfloop transitions, 11 changer transitions 6/52 dead transitions. [2024-01-27 15:29:14,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 307 flow [2024-01-27 15:29:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-27 15:29:14,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-01-27 15:29:14,975 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 107 flow. Second operand 5 states and 64 transitions. [2024-01-27 15:29:14,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 307 flow [2024-01-27 15:29:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 52 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:14,978 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 172 flow [2024-01-27 15:29:14,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-01-27 15:29:14,979 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 12 predicate places. [2024-01-27 15:29:14,979 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 172 flow [2024-01-27 15:29:14,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:14,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:14,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:14,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:29:14,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash 2106828068, now seen corresponding path program 1 times [2024-01-27 15:29:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989843280] [2024-01-27 15:29:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:14,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:15,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:15,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989843280] [2024-01-27 15:29:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989843280] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:15,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825998936] [2024-01-27 15:29:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:15,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:15,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:15,050 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) [2024-01-27 15:29:15,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:29:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:15,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-27 15:29:15,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:15,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:15,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825998936] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:15,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-01-27 15:29:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418836793] [2024-01-27 15:29:15,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:29:15,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:29:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:29:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:15,357 INFO L124 PetriNetUnfolderBase]: 131/234 cut-off events. [2024-01-27 15:29:15,357 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-01-27 15:29:15,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 234 events. 131/234 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 730 event pairs, 2 based on Foata normal form. 20/251 useless extension candidates. Maximal degree in co-relation 523. Up to 96 conditions per place. [2024-01-27 15:29:15,359 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 43 selfloop transitions, 9 changer transitions 4/59 dead transitions. [2024-01-27 15:29:15,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 59 transitions, 421 flow [2024-01-27 15:29:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-01-27 15:29:15,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-01-27 15:29:15,361 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 172 flow. Second operand 5 states and 68 transitions. [2024-01-27 15:29:15,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 59 transitions, 421 flow [2024-01-27 15:29:15,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 415 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-27 15:29:15,366 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 244 flow [2024-01-27 15:29:15,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-01-27 15:29:15,368 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2024-01-27 15:29:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 244 flow [2024-01-27 15:29:15,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:15,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:15,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:15,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:15,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:15,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:15,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash 94003086, now seen corresponding path program 2 times [2024-01-27 15:29:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:15,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492372806] [2024-01-27 15:29:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492372806] [2024-01-27 15:29:15,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492372806] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:29:15,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:29:15,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:29:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812195224] [2024-01-27 15:29:15,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:29:15,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:29:15,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:29:15,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:29:15,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:15,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:15,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:15,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:15,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:15,698 INFO L124 PetriNetUnfolderBase]: 119/210 cut-off events. [2024-01-27 15:29:15,700 INFO L125 PetriNetUnfolderBase]: For 488/488 co-relation queries the response was YES. [2024-01-27 15:29:15,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 210 events. 119/210 cut-off events. For 488/488 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 628 event pairs, 26 based on Foata normal form. 2/208 useless extension candidates. Maximal degree in co-relation 531. Up to 68 conditions per place. [2024-01-27 15:29:15,702 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 41 selfloop transitions, 9 changer transitions 2/55 dead transitions. [2024-01-27 15:29:15,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 450 flow [2024-01-27 15:29:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:29:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:29:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-01-27 15:29:15,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-01-27 15:29:15,706 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 244 flow. Second operand 5 states and 61 transitions. [2024-01-27 15:29:15,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 450 flow [2024-01-27 15:29:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 432 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:15,709 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 286 flow [2024-01-27 15:29:15,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-01-27 15:29:15,711 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2024-01-27 15:29:15,711 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 286 flow [2024-01-27 15:29:15,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:15,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:15,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:15,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:29:15,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:15,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2010060287, now seen corresponding path program 1 times [2024-01-27 15:29:15,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:15,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111231404] [2024-01-27 15:29:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:15,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111231404] [2024-01-27 15:29:16,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111231404] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398878583] [2024-01-27 15:29:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:16,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:16,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:16,053 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) [2024-01-27 15:29:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:29:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:16,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:29:16,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:16,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:16,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398878583] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:16,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:16,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:29:16,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259732344] [2024-01-27 15:29:16,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:16,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:29:16,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:16,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:29:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:29:16,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:16,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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) [2024-01-27 15:29:16,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:16,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:16,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:16,594 INFO L124 PetriNetUnfolderBase]: 262/448 cut-off events. [2024-01-27 15:29:16,595 INFO L125 PetriNetUnfolderBase]: For 1207/1207 co-relation queries the response was YES. [2024-01-27 15:29:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 448 events. 262/448 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1659 event pairs, 18 based on Foata normal form. 4/450 useless extension candidates. Maximal degree in co-relation 1336. Up to 190 conditions per place. [2024-01-27 15:29:16,597 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 79 selfloop transitions, 24 changer transitions 8/114 dead transitions. [2024-01-27 15:29:16,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 114 transitions, 1013 flow [2024-01-27 15:29:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:29:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:29:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-01-27 15:29:16,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-01-27 15:29:16,598 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 286 flow. Second operand 9 states and 119 transitions. [2024-01-27 15:29:16,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 114 transitions, 1013 flow [2024-01-27 15:29:16,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 114 transitions, 982 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:16,602 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 533 flow [2024-01-27 15:29:16,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-01-27 15:29:16,603 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2024-01-27 15:29:16,603 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 533 flow [2024-01-27 15:29:16,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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) [2024-01-27 15:29:16,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:16,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:16,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:29:16,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2045980297, now seen corresponding path program 2 times [2024-01-27 15:29:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:16,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136846222] [2024-01-27 15:29:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:16,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:16,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136846222] [2024-01-27 15:29:16,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136846222] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:16,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441425162] [2024-01-27 15:29:16,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:16,990 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) [2024-01-27 15:29:17,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:29:17,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:17,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:29:17,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:17,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441425162] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:21,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:21,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:29:21,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215030522] [2024-01-27 15:29:21,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:21,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:29:21,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:29:21,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2024-01-27 15:29:21,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:21,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 533 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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) [2024-01-27 15:29:21,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:21,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:21,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:22,023 INFO L124 PetriNetUnfolderBase]: 789/1364 cut-off events. [2024-01-27 15:29:22,023 INFO L125 PetriNetUnfolderBase]: For 4536/4536 co-relation queries the response was YES. [2024-01-27 15:29:22,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 1364 events. 789/1364 cut-off events. For 4536/4536 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6829 event pairs, 70 based on Foata normal form. 8/1370 useless extension candidates. Maximal degree in co-relation 5602. Up to 397 conditions per place. [2024-01-27 15:29:22,033 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 157 selfloop transitions, 96 changer transitions 13/269 dead transitions. [2024-01-27 15:29:22,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 269 transitions, 2632 flow [2024-01-27 15:29:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:29:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:29:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 244 transitions. [2024-01-27 15:29:22,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6834733893557423 [2024-01-27 15:29:22,035 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 533 flow. Second operand 17 states and 244 transitions. [2024-01-27 15:29:22,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 269 transitions, 2632 flow [2024-01-27 15:29:22,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 269 transitions, 2521 flow, removed 54 selfloop flow, removed 1 redundant places. [2024-01-27 15:29:22,050 INFO L231 Difference]: Finished difference. Result has 83 places, 148 transitions, 1723 flow [2024-01-27 15:29:22,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1723, PETRI_PLACES=83, PETRI_TRANSITIONS=148} [2024-01-27 15:29:22,051 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 61 predicate places. [2024-01-27 15:29:22,051 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 148 transitions, 1723 flow [2024-01-27 15:29:22,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 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) [2024-01-27 15:29:22,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:22,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:22,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:22,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:22,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 561767467, now seen corresponding path program 3 times [2024-01-27 15:29:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252580615] [2024-01-27 15:29:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:22,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:22,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252580615] [2024-01-27 15:29:22,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252580615] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:22,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711600378] [2024-01-27 15:29:22,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:22,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:22,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:22,504 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) [2024-01-27 15:29:22,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:29:22,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:29:22,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:22,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:29:22,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:22,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:22,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711600378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:22,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:29:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108900360] [2024-01-27 15:29:22,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:22,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:29:22,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:22,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:29:22,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:29:22,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:22,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 148 transitions, 1723 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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) [2024-01-27 15:29:22,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:22,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:22,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:23,461 INFO L124 PetriNetUnfolderBase]: 1613/2797 cut-off events. [2024-01-27 15:29:23,461 INFO L125 PetriNetUnfolderBase]: For 13902/13902 co-relation queries the response was YES. [2024-01-27 15:29:23,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14826 conditions, 2797 events. 1613/2797 cut-off events. For 13902/13902 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16169 event pairs, 160 based on Foata normal form. 7/2802 useless extension candidates. Maximal degree in co-relation 12884. Up to 750 conditions per place. [2024-01-27 15:29:23,481 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 194 selfloop transitions, 164 changer transitions 13/374 dead transitions. [2024-01-27 15:29:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 374 transitions, 4759 flow [2024-01-27 15:29:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:29:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:29:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-01-27 15:29:23,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6623376623376623 [2024-01-27 15:29:23,483 INFO L175 Difference]: Start difference. First operand has 83 places, 148 transitions, 1723 flow. Second operand 11 states and 153 transitions. [2024-01-27 15:29:23,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 374 transitions, 4759 flow [2024-01-27 15:29:23,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 374 transitions, 4486 flow, removed 133 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:23,519 INFO L231 Difference]: Finished difference. Result has 96 places, 259 transitions, 3565 flow [2024-01-27 15:29:23,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3565, PETRI_PLACES=96, PETRI_TRANSITIONS=259} [2024-01-27 15:29:23,521 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2024-01-27 15:29:23,521 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 259 transitions, 3565 flow [2024-01-27 15:29:23,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 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) [2024-01-27 15:29:23,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:23,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:23,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:23,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:23,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash 345813392, now seen corresponding path program 1 times [2024-01-27 15:29:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:23,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249379141] [2024-01-27 15:29:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:23,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249379141] [2024-01-27 15:29:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249379141] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037504476] [2024-01-27 15:29:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:23,812 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) [2024-01-27 15:29:23,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:29:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:23,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:29:23,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:23,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037504476] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:23,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:23,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:29:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512420628] [2024-01-27 15:29:23,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:23,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:29:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:29:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:29:23,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:23,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 259 transitions, 3565 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:23,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:23,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:23,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:24,580 INFO L124 PetriNetUnfolderBase]: 2463/4388 cut-off events. [2024-01-27 15:29:24,581 INFO L125 PetriNetUnfolderBase]: For 29339/29339 co-relation queries the response was YES. [2024-01-27 15:29:24,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25157 conditions, 4388 events. 2463/4388 cut-off events. For 29339/29339 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29113 event pairs, 79 based on Foata normal form. 64/4449 useless extension candidates. Maximal degree in co-relation 22090. Up to 1332 conditions per place. [2024-01-27 15:29:24,624 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 414 selfloop transitions, 149 changer transitions 2/568 dead transitions. [2024-01-27 15:29:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 568 transitions, 8283 flow [2024-01-27 15:29:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:29:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:29:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-01-27 15:29:24,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-01-27 15:29:24,626 INFO L175 Difference]: Start difference. First operand has 96 places, 259 transitions, 3565 flow. Second operand 12 states and 149 transitions. [2024-01-27 15:29:24,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 568 transitions, 8283 flow [2024-01-27 15:29:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 568 transitions, 8115 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-01-27 15:29:24,760 INFO L231 Difference]: Finished difference. Result has 108 places, 355 transitions, 5547 flow [2024-01-27 15:29:24,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5547, PETRI_PLACES=108, PETRI_TRANSITIONS=355} [2024-01-27 15:29:24,762 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 86 predicate places. [2024-01-27 15:29:24,762 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 355 transitions, 5547 flow [2024-01-27 15:29:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:24,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:24,974 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:24,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:24,975 INFO L85 PathProgramCache]: Analyzing trace with hash 74651199, now seen corresponding path program 2 times [2024-01-27 15:29:24,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:24,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984063226] [2024-01-27 15:29:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:24,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:25,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984063226] [2024-01-27 15:29:25,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984063226] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426145424] [2024-01-27 15:29:25,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:29:25,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:25,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:25,237 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) [2024-01-27 15:29:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:29:25,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:29:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:25,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-27 15:29:25,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:25,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:26,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426145424] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:26,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:26,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-01-27 15:29:26,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249587623] [2024-01-27 15:29:26,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:26,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:29:26,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:26,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:29:26,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:29:26,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:26,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 355 transitions, 5547 flow. Second operand has 17 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:26,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:26,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:26,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:27,872 INFO L124 PetriNetUnfolderBase]: 3784/6754 cut-off events. [2024-01-27 15:29:27,872 INFO L125 PetriNetUnfolderBase]: For 64220/64220 co-relation queries the response was YES. [2024-01-27 15:29:27,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43372 conditions, 6754 events. 3784/6754 cut-off events. For 64220/64220 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 46633 event pairs, 330 based on Foata normal form. 29/6781 useless extension candidates. Maximal degree in co-relation 42425. Up to 4040 conditions per place. [2024-01-27 15:29:27,928 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 500 selfloop transitions, 240 changer transitions 26/769 dead transitions. [2024-01-27 15:29:27,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 769 transitions, 12740 flow [2024-01-27 15:29:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:29:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:29:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 256 transitions. [2024-01-27 15:29:27,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416040100250626 [2024-01-27 15:29:27,930 INFO L175 Difference]: Start difference. First operand has 108 places, 355 transitions, 5547 flow. Second operand 19 states and 256 transitions. [2024-01-27 15:29:27,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 769 transitions, 12740 flow [2024-01-27 15:29:28,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 769 transitions, 12115 flow, removed 303 selfloop flow, removed 2 redundant places. [2024-01-27 15:29:28,128 INFO L231 Difference]: Finished difference. Result has 134 places, 539 transitions, 9138 flow [2024-01-27 15:29:28,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5200, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9138, PETRI_PLACES=134, PETRI_TRANSITIONS=539} [2024-01-27 15:29:28,129 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 112 predicate places. [2024-01-27 15:29:28,129 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 539 transitions, 9138 flow [2024-01-27 15:29:28,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:28,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:28,130 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:28,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:28,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:28,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:28,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1283506531, now seen corresponding path program 3 times [2024-01-27 15:29:28,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:28,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362365820] [2024-01-27 15:29:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:28,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:28,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362365820] [2024-01-27 15:29:28,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362365820] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:28,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495998837] [2024-01-27 15:29:28,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:29:28,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:28,655 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) [2024-01-27 15:29:28,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:29:28,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:29:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:28,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-27 15:29:28,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:29,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:29:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495998837] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:29,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-01-27 15:29:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866369192] [2024-01-27 15:29:29,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:29:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:29:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:29:29,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:29,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 539 transitions, 9138 flow. Second operand has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:29,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:29,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:29,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:33,419 INFO L124 PetriNetUnfolderBase]: 5051/9027 cut-off events. [2024-01-27 15:29:33,419 INFO L125 PetriNetUnfolderBase]: For 103572/103572 co-relation queries the response was YES. [2024-01-27 15:29:33,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61179 conditions, 9027 events. 5051/9027 cut-off events. For 103572/103572 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 66147 event pairs, 488 based on Foata normal form. 12/9037 useless extension candidates. Maximal degree in co-relation 59990. Up to 6389 conditions per place. [2024-01-27 15:29:33,495 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 657 selfloop transitions, 282 changer transitions 17/959 dead transitions. [2024-01-27 15:29:33,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 959 transitions, 17160 flow [2024-01-27 15:29:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-27 15:29:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-27 15:29:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 309 transitions. [2024-01-27 15:29:33,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-01-27 15:29:33,497 INFO L175 Difference]: Start difference. First operand has 134 places, 539 transitions, 9138 flow. Second operand 22 states and 309 transitions. [2024-01-27 15:29:33,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 959 transitions, 17160 flow [2024-01-27 15:29:33,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 959 transitions, 16428 flow, removed 352 selfloop flow, removed 6 redundant places. [2024-01-27 15:29:33,995 INFO L231 Difference]: Finished difference. Result has 158 places, 764 transitions, 14003 flow [2024-01-27 15:29:33,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8698, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14003, PETRI_PLACES=158, PETRI_TRANSITIONS=764} [2024-01-27 15:29:33,996 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-01-27 15:29:33,996 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 764 transitions, 14003 flow [2024-01-27 15:29:33,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.529411764705882) internal successors, (128), 17 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:33,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:33,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:34,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:34,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:34,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:34,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash 406255880, now seen corresponding path program 4 times [2024-01-27 15:29:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:34,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428085516] [2024-01-27 15:29:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:34,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:34,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428085516] [2024-01-27 15:29:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428085516] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:34,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342040702] [2024-01-27 15:29:34,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:29:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:34,285 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) [2024-01-27 15:29:34,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:29:34,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:29:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:34,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:29:34,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:34,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342040702] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:34,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-01-27 15:29:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224050051] [2024-01-27 15:29:34,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:29:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:29:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:29:34,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:34,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 764 transitions, 14003 flow. Second operand has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 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) [2024-01-27 15:29:34,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:34,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:34,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:36,899 INFO L124 PetriNetUnfolderBase]: 5717/10711 cut-off events. [2024-01-27 15:29:36,899 INFO L125 PetriNetUnfolderBase]: For 138256/138256 co-relation queries the response was YES. [2024-01-27 15:29:36,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74966 conditions, 10711 events. 5717/10711 cut-off events. For 138256/138256 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 85487 event pairs, 618 based on Foata normal form. 40/10749 useless extension candidates. Maximal degree in co-relation 72374. Up to 4649 conditions per place. [2024-01-27 15:29:36,987 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 682 selfloop transitions, 559 changer transitions 6/1250 dead transitions. [2024-01-27 15:29:36,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 1250 transitions, 24613 flow [2024-01-27 15:29:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:29:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:29:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-01-27 15:29:36,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-01-27 15:29:36,988 INFO L175 Difference]: Start difference. First operand has 158 places, 764 transitions, 14003 flow. Second operand 14 states and 163 transitions. [2024-01-27 15:29:36,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 1250 transitions, 24613 flow [2024-01-27 15:29:37,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 1250 transitions, 23527 flow, removed 509 selfloop flow, removed 9 redundant places. [2024-01-27 15:29:37,876 INFO L231 Difference]: Finished difference. Result has 168 places, 946 transitions, 18448 flow [2024-01-27 15:29:37,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13236, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18448, PETRI_PLACES=168, PETRI_TRANSITIONS=946} [2024-01-27 15:29:37,877 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 146 predicate places. [2024-01-27 15:29:37,877 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 946 transitions, 18448 flow [2024-01-27 15:29:37,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.11111111111111) internal successors, (73), 9 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) [2024-01-27 15:29:37,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:37,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:37,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:38,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:29:38,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:38,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1110591181, now seen corresponding path program 5 times [2024-01-27 15:29:38,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:38,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046426377] [2024-01-27 15:29:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046426377] [2024-01-27 15:29:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046426377] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412989129] [2024-01-27 15:29:38,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:29:38,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:38,391 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) [2024-01-27 15:29:38,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:29:38,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:29:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:38,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:29:38,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:38,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412989129] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:39,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:39,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-01-27 15:29:39,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265223265] [2024-01-27 15:29:39,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:39,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:29:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:29:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:29:39,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:39,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 946 transitions, 18448 flow. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:39,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:39,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:39,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:45,553 INFO L124 PetriNetUnfolderBase]: 6951/12662 cut-off events. [2024-01-27 15:29:45,554 INFO L125 PetriNetUnfolderBase]: For 198105/198105 co-relation queries the response was YES. [2024-01-27 15:29:45,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96573 conditions, 12662 events. 6951/12662 cut-off events. For 198105/198105 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 100866 event pairs, 580 based on Foata normal form. 108/12768 useless extension candidates. Maximal degree in co-relation 93408. Up to 4186 conditions per place. [2024-01-27 15:29:45,904 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 498 selfloop transitions, 1072 changer transitions 27/1600 dead transitions. [2024-01-27 15:29:45,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 1600 transitions, 33284 flow [2024-01-27 15:29:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:29:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:29:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 433 transitions. [2024-01-27 15:29:45,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727513227513228 [2024-01-27 15:29:45,906 INFO L175 Difference]: Start difference. First operand has 168 places, 946 transitions, 18448 flow. Second operand 36 states and 433 transitions. [2024-01-27 15:29:45,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 1600 transitions, 33284 flow [2024-01-27 15:29:47,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1600 transitions, 32284 flow, removed 466 selfloop flow, removed 4 redundant places. [2024-01-27 15:29:47,220 INFO L231 Difference]: Finished difference. Result has 211 places, 1383 transitions, 31046 flow [2024-01-27 15:29:47,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15830, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31046, PETRI_PLACES=211, PETRI_TRANSITIONS=1383} [2024-01-27 15:29:47,222 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 189 predicate places. [2024-01-27 15:29:47,222 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 1383 transitions, 31046 flow [2024-01-27 15:29:47,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:47,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:47,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:47,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:29:47,426 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:47,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1788057604, now seen corresponding path program 6 times [2024-01-27 15:29:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:47,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786241637] [2024-01-27 15:29:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:47,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:47,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:47,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786241637] [2024-01-27 15:29:47,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786241637] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:47,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278406862] [2024-01-27 15:29:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:29:47,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:47,532 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) [2024-01-27 15:29:47,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:29:47,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:29:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:29:47,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:29:47,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278406862] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:47,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:47,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:29:47,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876854295] [2024-01-27 15:29:47,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:47,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:29:47,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:29:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:29:47,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:47,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 1383 transitions, 31046 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:47,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:47,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:47,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:29:53,042 INFO L124 PetriNetUnfolderBase]: 8084/14592 cut-off events. [2024-01-27 15:29:53,042 INFO L125 PetriNetUnfolderBase]: For 260774/260774 co-relation queries the response was YES. [2024-01-27 15:29:53,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120674 conditions, 14592 events. 8084/14592 cut-off events. For 260774/260774 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 118226 event pairs, 664 based on Foata normal form. 156/14746 useless extension candidates. Maximal degree in co-relation 116788. Up to 6017 conditions per place. [2024-01-27 15:29:53,203 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1008 selfloop transitions, 985 changer transitions 0/1996 dead transitions. [2024-01-27 15:29:53,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1996 transitions, 46729 flow [2024-01-27 15:29:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:29:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:29:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-01-27 15:29:53,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-01-27 15:29:53,207 INFO L175 Difference]: Start difference. First operand has 211 places, 1383 transitions, 31046 flow. Second operand 14 states and 166 transitions. [2024-01-27 15:29:53,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1996 transitions, 46729 flow [2024-01-27 15:29:56,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1996 transitions, 43520 flow, removed 1492 selfloop flow, removed 13 redundant places. [2024-01-27 15:29:56,353 INFO L231 Difference]: Finished difference. Result has 219 places, 1641 transitions, 38441 flow [2024-01-27 15:29:56,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=28493, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=38441, PETRI_PLACES=219, PETRI_TRANSITIONS=1641} [2024-01-27 15:29:56,354 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 197 predicate places. [2024-01-27 15:29:56,354 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 1641 transitions, 38441 flow [2024-01-27 15:29:56,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:56,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:29:56,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:29:56,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:29:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:29:56,565 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:29:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:29:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 344771818, now seen corresponding path program 7 times [2024-01-27 15:29:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:29:56,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647920594] [2024-01-27 15:29:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:29:56,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:29:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:56,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:29:56,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647920594] [2024-01-27 15:29:56,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647920594] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:29:56,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290612511] [2024-01-27 15:29:56,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:29:56,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:29:56,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:29:56,638 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) [2024-01-27 15:29:56,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:29:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:29:56,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:29:56,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:29:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:29:56,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:29:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:29:56,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290612511] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:29:56,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:29:56,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2024-01-27 15:29:56,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065039825] [2024-01-27 15:29:56,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:29:56,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:29:56,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:29:56,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:29:56,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:29:56,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:29:56,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 1641 transitions, 38441 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:29:56,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:29:56,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:29:56,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:03,517 INFO L124 PetriNetUnfolderBase]: 8547/15401 cut-off events. [2024-01-27 15:30:03,518 INFO L125 PetriNetUnfolderBase]: For 331552/331552 co-relation queries the response was YES. [2024-01-27 15:30:03,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135227 conditions, 15401 events. 8547/15401 cut-off events. For 331552/331552 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 126012 event pairs, 81 based on Foata normal form. 96/15494 useless extension candidates. Maximal degree in co-relation 131316. Up to 4582 conditions per place. [2024-01-27 15:30:03,703 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1550 selfloop transitions, 686 changer transitions 0/2239 dead transitions. [2024-01-27 15:30:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 2239 transitions, 52300 flow [2024-01-27 15:30:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:30:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:30:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 171 transitions. [2024-01-27 15:30:03,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-01-27 15:30:03,705 INFO L175 Difference]: Start difference. First operand has 219 places, 1641 transitions, 38441 flow. Second operand 15 states and 171 transitions. [2024-01-27 15:30:03,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 2239 transitions, 52300 flow [2024-01-27 15:30:07,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 2239 transitions, 51962 flow, removed 162 selfloop flow, removed 2 redundant places. [2024-01-27 15:30:07,797 INFO L231 Difference]: Finished difference. Result has 236 places, 1732 transitions, 42757 flow [2024-01-27 15:30:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=37664, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1029, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=42757, PETRI_PLACES=236, PETRI_TRANSITIONS=1732} [2024-01-27 15:30:07,800 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 214 predicate places. [2024-01-27 15:30:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1732 transitions, 42757 flow [2024-01-27 15:30:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:07,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:08,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:30:08,013 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:08,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1316501185, now seen corresponding path program 8 times [2024-01-27 15:30:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42777544] [2024-01-27 15:30:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:08,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:08,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42777544] [2024-01-27 15:30:08,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42777544] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:08,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905315143] [2024-01-27 15:30:08,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:30:08,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:08,264 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) [2024-01-27 15:30:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:30:08,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:30:08,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:08,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:30:08,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:08,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905315143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:09,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:09,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-01-27 15:30:09,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299376319] [2024-01-27 15:30:09,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:09,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:30:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:30:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:30:09,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:30:09,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1732 transitions, 42757 flow. Second operand has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:09,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:09,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:30:09,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:30:22,896 INFO L124 PetriNetUnfolderBase]: 14024/25132 cut-off events. [2024-01-27 15:30:22,896 INFO L125 PetriNetUnfolderBase]: For 641144/641144 co-relation queries the response was YES. [2024-01-27 15:30:23,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235468 conditions, 25132 events. 14024/25132 cut-off events. For 641144/641144 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 220948 event pairs, 1117 based on Foata normal form. 67/25196 useless extension candidates. Maximal degree in co-relation 229753. Up to 8568 conditions per place. [2024-01-27 15:30:23,202 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1054 selfloop transitions, 2405 changer transitions 50/3512 dead transitions. [2024-01-27 15:30:23,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 3512 transitions, 93839 flow [2024-01-27 15:30:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:30:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:30:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 439 transitions. [2024-01-27 15:30:23,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550125313283208 [2024-01-27 15:30:23,216 INFO L175 Difference]: Start difference. First operand has 236 places, 1732 transitions, 42757 flow. Second operand 38 states and 439 transitions. [2024-01-27 15:30:23,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 3512 transitions, 93839 flow [2024-01-27 15:30:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 3512 transitions, 92170 flow, removed 249 selfloop flow, removed 4 redundant places. [2024-01-27 15:30:33,290 INFO L231 Difference]: Finished difference. Result has 290 places, 3132 transitions, 87302 flow [2024-01-27 15:30:33,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=42152, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=87302, PETRI_PLACES=290, PETRI_TRANSITIONS=3132} [2024-01-27 15:30:33,291 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 268 predicate places. [2024-01-27 15:30:33,292 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 3132 transitions, 87302 flow [2024-01-27 15:30:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.2631578947368425) internal successors, (138), 19 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:33,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:30:33,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:30:33,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:30:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:30:33,502 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:30:33,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:30:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash 902484041, now seen corresponding path program 9 times [2024-01-27 15:30:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:30:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327042367] [2024-01-27 15:30:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:30:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:30:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:30:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:33,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:30:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327042367] [2024-01-27 15:30:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327042367] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:30:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296269273] [2024-01-27 15:30:33,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:30:33,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:30:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:30:33,811 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) [2024-01-27 15:30:33,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:30:33,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:30:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:30:33,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-27 15:30:33,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:30:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:30:34,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:30:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:30:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296269273] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:30:34,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:30:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2024-01-27 15:30:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627796052] [2024-01-27 15:30:34,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:30:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:30:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:30:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:30:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:30:34,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:30:34,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 3132 transitions, 87302 flow. Second operand has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:30:34,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:30:34,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:30:34,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:31:01,921 INFO L124 PetriNetUnfolderBase]: 17527/31373 cut-off events. [2024-01-27 15:31:01,921 INFO L125 PetriNetUnfolderBase]: For 891977/891977 co-relation queries the response was YES. [2024-01-27 15:31:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313056 conditions, 31373 events. 17527/31373 cut-off events. For 891977/891977 co-relation queries the response was YES. Maximal size of possible extension queue 2039. Compared 284048 event pairs, 1494 based on Foata normal form. 22/31393 useless extension candidates. Maximal degree in co-relation 305246. Up to 14339 conditions per place. [2024-01-27 15:31:02,584 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1224 selfloop transitions, 3132 changer transitions 35/4394 dead transitions. [2024-01-27 15:31:02,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 4394 transitions, 130313 flow [2024-01-27 15:31:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:31:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:31:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 392 transitions. [2024-01-27 15:31:02,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-01-27 15:31:02,586 INFO L175 Difference]: Start difference. First operand has 290 places, 3132 transitions, 87302 flow. Second operand 33 states and 392 transitions. [2024-01-27 15:31:02,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 4394 transitions, 130313 flow [2024-01-27 15:31:24,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 4394 transitions, 120324 flow, removed 4980 selfloop flow, removed 4 redundant places. [2024-01-27 15:31:24,915 INFO L231 Difference]: Finished difference. Result has 336 places, 4157 transitions, 121218 flow [2024-01-27 15:31:24,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=81053, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=121218, PETRI_PLACES=336, PETRI_TRANSITIONS=4157} [2024-01-27 15:31:24,917 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 314 predicate places. [2024-01-27 15:31:24,918 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 4157 transitions, 121218 flow [2024-01-27 15:31:24,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.190476190476191) internal successors, (151), 21 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:31:24,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:31:24,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:31:24,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-27 15:31:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:31:25,128 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:31:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:31:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1033932986, now seen corresponding path program 10 times [2024-01-27 15:31:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:31:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106327211] [2024-01-27 15:31:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:31:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:31:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:31:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:31:25,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:31:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106327211] [2024-01-27 15:31:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106327211] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:31:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213619541] [2024-01-27 15:31:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:31:25,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:31:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:31:25,171 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) [2024-01-27 15:31:25,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:31:25,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:31:25,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:31:25,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:31:25,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:31:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:31:25,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:31:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:31:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213619541] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:31:25,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:31:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:31:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141961124] [2024-01-27 15:31:25,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:31:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:31:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:31:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:31:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:31:25,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:31:25,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 4157 transitions, 121218 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-01-27 15:31:25,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:31:25,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:31:25,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:32:04,506 INFO L124 PetriNetUnfolderBase]: 19203/34082 cut-off events. [2024-01-27 15:32:04,506 INFO L125 PetriNetUnfolderBase]: For 1106460/1106460 co-relation queries the response was YES. [2024-01-27 15:32:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347936 conditions, 34082 events. 19203/34082 cut-off events. For 1106460/1106460 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 305582 event pairs, 1646 based on Foata normal form. 2746/36826 useless extension candidates. Maximal degree in co-relation 343849. Up to 23713 conditions per place. [2024-01-27 15:32:05,439 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 3923 selfloop transitions, 1431 changer transitions 0/5357 dead transitions. [2024-01-27 15:32:05,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 5357 transitions, 161103 flow [2024-01-27 15:32:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:32:05,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:32:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-01-27 15:32:05,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6117216117216118 [2024-01-27 15:32:05,440 INFO L175 Difference]: Start difference. First operand has 336 places, 4157 transitions, 121218 flow. Second operand 13 states and 167 transitions. [2024-01-27 15:32:05,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 5357 transitions, 161103 flow [2024-01-27 15:32:33,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 5357 transitions, 154618 flow, removed 2730 selfloop flow, removed 6 redundant places. [2024-01-27 15:32:33,154 INFO L231 Difference]: Finished difference. Result has 349 places, 4790 transitions, 138226 flow [2024-01-27 15:32:33,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=107863, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=700, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=138226, PETRI_PLACES=349, PETRI_TRANSITIONS=4790} [2024-01-27 15:32:33,157 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 327 predicate places. [2024-01-27 15:32:33,157 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 4790 transitions, 138226 flow [2024-01-27 15:32:33,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-01-27 15:32:33,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:32:33,158 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:32:33,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:32:33,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:33,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:32:33,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:32:33,359 INFO L85 PathProgramCache]: Analyzing trace with hash -780094457, now seen corresponding path program 11 times [2024-01-27 15:32:33,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:32:33,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870051616] [2024-01-27 15:32:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:32:33,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:32:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:32:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:32:33,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:32:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870051616] [2024-01-27 15:32:33,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870051616] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:32:33,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582076538] [2024-01-27 15:32:33,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:32:33,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:32:33,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:32:33,394 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) [2024-01-27 15:32:33,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:32:33,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:32:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:32:33,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:32:33,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:32:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:32:33,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:32:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:32:33,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582076538] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:32:33,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:32:33,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-27 15:32:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457882871] [2024-01-27 15:32:33,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:32:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:32:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:32:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:32:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:32:33,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:32:33,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 4790 transitions, 138226 flow. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:32:33,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:32:33,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:32:33,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:08,867 INFO L124 PetriNetUnfolderBase]: 15026/26974 cut-off events. [2024-01-27 15:33:08,867 INFO L125 PetriNetUnfolderBase]: For 958586/958586 co-relation queries the response was YES. [2024-01-27 15:33:09,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278006 conditions, 26974 events. 15026/26974 cut-off events. For 958586/958586 co-relation queries the response was YES. Maximal size of possible extension queue 1643. Compared 238524 event pairs, 1064 based on Foata normal form. 1298/28270 useless extension candidates. Maximal degree in co-relation 273939. Up to 18589 conditions per place. [2024-01-27 15:33:09,587 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 3134 selfloop transitions, 720 changer transitions 9/3866 dead transitions. [2024-01-27 15:33:09,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 3866 transitions, 117748 flow [2024-01-27 15:33:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:33:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:33:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-27 15:33:09,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-01-27 15:33:09,588 INFO L175 Difference]: Start difference. First operand has 349 places, 4790 transitions, 138226 flow. Second operand 5 states and 66 transitions. [2024-01-27 15:33:09,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 3866 transitions, 117748 flow [2024-01-27 15:33:30,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 3866 transitions, 113192 flow, removed 1866 selfloop flow, removed 15 redundant places. [2024-01-27 15:33:30,426 INFO L231 Difference]: Finished difference. Result has 333 places, 3691 transitions, 104224 flow [2024-01-27 15:33:30,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=98639, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2900, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104224, PETRI_PLACES=333, PETRI_TRANSITIONS=3691} [2024-01-27 15:33:30,429 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 311 predicate places. [2024-01-27 15:33:30,429 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 3691 transitions, 104224 flow [2024-01-27 15:33:30,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:30,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:33:30,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:33:30,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:33:30,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:30,640 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:33:30,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:33:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash 851216290, now seen corresponding path program 12 times [2024-01-27 15:33:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:33:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372538716] [2024-01-27 15:33:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:33:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:33:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:33:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:33:30,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:33:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372538716] [2024-01-27 15:33:30,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372538716] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:33:30,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644123603] [2024-01-27 15:33:30,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:33:30,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:33:30,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:33:30,698 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) [2024-01-27 15:33:30,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:33:30,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:33:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:33:30,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:33:30,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:33:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:33:30,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:33:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:33:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644123603] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:33:30,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:33:30,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-01-27 15:33:30,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211819133] [2024-01-27 15:33:30,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:33:30,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:33:30,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:33:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:33:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:33:30,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:33:30,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 3691 transitions, 104224 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:33:30,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:33:30,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:33:30,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:33:57,265 INFO L124 PetriNetUnfolderBase]: 14693/26107 cut-off events. [2024-01-27 15:33:57,266 INFO L125 PetriNetUnfolderBase]: For 838284/838284 co-relation queries the response was YES. [2024-01-27 15:33:57,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268173 conditions, 26107 events. 14693/26107 cut-off events. For 838284/838284 co-relation queries the response was YES. Maximal size of possible extension queue 1593. Compared 227666 event pairs, 651 based on Foata normal form. 70/26174 useless extension candidates. Maximal degree in co-relation 264997. Up to 14665 conditions per place. [2024-01-27 15:33:57,725 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 3050 selfloop transitions, 926 changer transitions 8/3987 dead transitions. [2024-01-27 15:33:57,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 3987 transitions, 116524 flow [2024-01-27 15:33:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:33:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:33:57,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 166 transitions. [2024-01-27 15:33:57,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526984126984127 [2024-01-27 15:33:57,727 INFO L175 Difference]: Start difference. First operand has 333 places, 3691 transitions, 104224 flow. Second operand 15 states and 166 transitions. [2024-01-27 15:33:57,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 3987 transitions, 116524 flow [2024-01-27 15:34:15,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 3987 transitions, 114530 flow, removed 997 selfloop flow, removed 0 redundant places. [2024-01-27 15:34:15,396 INFO L231 Difference]: Finished difference. Result has 351 places, 3643 transitions, 102317 flow [2024-01-27 15:34:15,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=97873, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=102317, PETRI_PLACES=351, PETRI_TRANSITIONS=3643} [2024-01-27 15:34:15,399 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 329 predicate places. [2024-01-27 15:34:15,399 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 3643 transitions, 102317 flow [2024-01-27 15:34:15,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:15,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:34:15,399 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:34:15,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:34:15,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:15,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:34:15,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:34:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash 291442518, now seen corresponding path program 13 times [2024-01-27 15:34:15,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:34:15,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609838496] [2024-01-27 15:34:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:34:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:34:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:15,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:34:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609838496] [2024-01-27 15:34:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609838496] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:34:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955868297] [2024-01-27 15:34:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:34:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:34:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:34:15,666 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) [2024-01-27 15:34:15,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:34:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:34:15,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:34:15,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:34:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:15,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:34:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:34:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955868297] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:34:15,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:34:15,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-27 15:34:15,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500776612] [2024-01-27 15:34:15,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:34:15,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:34:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:34:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:34:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:34:15,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:34:15,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 3643 transitions, 102317 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:34:15,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:34:15,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:34:15,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:34:44,013 INFO L124 PetriNetUnfolderBase]: 16292/29107 cut-off events. [2024-01-27 15:34:44,013 INFO L125 PetriNetUnfolderBase]: For 997876/997876 co-relation queries the response was YES. [2024-01-27 15:34:44,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300669 conditions, 29107 events. 16292/29107 cut-off events. For 997876/997876 co-relation queries the response was YES. Maximal size of possible extension queue 1809. Compared 259458 event pairs, 805 based on Foata normal form. 366/29470 useless extension candidates. Maximal degree in co-relation 297521. Up to 10569 conditions per place. [2024-01-27 15:34:44,637 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2804 selfloop transitions, 1434 changer transitions 180/4421 dead transitions. [2024-01-27 15:34:44,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 4421 transitions, 126167 flow [2024-01-27 15:34:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:34:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:34:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-01-27 15:34:44,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-01-27 15:34:44,639 INFO L175 Difference]: Start difference. First operand has 351 places, 3643 transitions, 102317 flow. Second operand 12 states and 141 transitions. [2024-01-27 15:34:44,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 4421 transitions, 126167 flow [2024-01-27 15:35:05,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 4421 transitions, 124641 flow, removed 706 selfloop flow, removed 4 redundant places. [2024-01-27 15:35:05,978 INFO L231 Difference]: Finished difference. Result has 363 places, 3632 transitions, 104523 flow [2024-01-27 15:35:05,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=94668, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=104523, PETRI_PLACES=363, PETRI_TRANSITIONS=3632} [2024-01-27 15:35:05,981 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 341 predicate places. [2024-01-27 15:35:05,981 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 3632 transitions, 104523 flow [2024-01-27 15:35:05,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:05,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:05,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:05,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:06,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:06,188 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:06,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 123789580, now seen corresponding path program 14 times [2024-01-27 15:35:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:06,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128956162] [2024-01-27 15:35:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:06,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128956162] [2024-01-27 15:35:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128956162] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206049256] [2024-01-27 15:35:06,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:06,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:06,289 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) [2024-01-27 15:35:06,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:35:06,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:06,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:06,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:35:06,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:06,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206049256] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:06,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:06,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-01-27 15:35:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185862844] [2024-01-27 15:35:06,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:35:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:06,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:35:06,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:35:06,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:06,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 3632 transitions, 104523 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:06,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:06,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:06,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:35,125 INFO L124 PetriNetUnfolderBase]: 15518/27616 cut-off events. [2024-01-27 15:35:35,126 INFO L125 PetriNetUnfolderBase]: For 1067242/1067242 co-relation queries the response was YES. [2024-01-27 15:35:35,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296083 conditions, 27616 events. 15518/27616 cut-off events. For 1067242/1067242 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 242408 event pairs, 1082 based on Foata normal form. 726/28340 useless extension candidates. Maximal degree in co-relation 293490. Up to 14575 conditions per place. [2024-01-27 15:35:36,034 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 2410 selfloop transitions, 1738 changer transitions 0/4151 dead transitions. [2024-01-27 15:35:36,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 4151 transitions, 124768 flow [2024-01-27 15:35:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:35:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:35:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-01-27 15:35:36,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017316017316018 [2024-01-27 15:35:36,036 INFO L175 Difference]: Start difference. First operand has 363 places, 3632 transitions, 104523 flow. Second operand 11 states and 139 transitions. [2024-01-27 15:35:36,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 4151 transitions, 124768 flow [2024-01-27 15:35:58,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 4151 transitions, 121682 flow, removed 1271 selfloop flow, removed 9 redundant places. [2024-01-27 15:35:58,825 INFO L231 Difference]: Finished difference. Result has 368 places, 3736 transitions, 111272 flow [2024-01-27 15:35:58,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=101321, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=111272, PETRI_PLACES=368, PETRI_TRANSITIONS=3736} [2024-01-27 15:35:58,828 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 346 predicate places. [2024-01-27 15:35:58,829 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 3736 transitions, 111272 flow [2024-01-27 15:35:58,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:58,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:58,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:58,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:59,033 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:59,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1825035099, now seen corresponding path program 15 times [2024-01-27 15:35:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262769340] [2024-01-27 15:35:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:35:59,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:59,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262769340] [2024-01-27 15:35:59,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262769340] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:59,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:59,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:35:59,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126001764] [2024-01-27 15:35:59,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:59,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:35:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:35:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:35:59,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:35:59,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 3736 transitions, 111272 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:59,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:59,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:35:59,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:12,805 INFO L124 PetriNetUnfolderBase]: 6647/12562 cut-off events. [2024-01-27 15:36:12,806 INFO L125 PetriNetUnfolderBase]: For 451551/451551 co-relation queries the response was YES. [2024-01-27 15:36:12,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136817 conditions, 12562 events. 6647/12562 cut-off events. For 451551/451551 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 106848 event pairs, 1440 based on Foata normal form. 662/13221 useless extension candidates. Maximal degree in co-relation 136337. Up to 6047 conditions per place. [2024-01-27 15:36:12,965 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 1116 selfloop transitions, 239 changer transitions 582/1940 dead transitions. [2024-01-27 15:36:12,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1940 transitions, 60950 flow [2024-01-27 15:36:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:36:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:36:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-01-27 15:36:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-01-27 15:36:12,967 INFO L175 Difference]: Start difference. First operand has 368 places, 3736 transitions, 111272 flow. Second operand 4 states and 55 transitions. [2024-01-27 15:36:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1940 transitions, 60950 flow [2024-01-27 15:36:17,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1940 transitions, 58329 flow, removed 1061 selfloop flow, removed 28 redundant places. [2024-01-27 15:36:17,887 INFO L231 Difference]: Finished difference. Result has 335 places, 1264 transitions, 35990 flow [2024-01-27 15:36:17,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50106, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=35990, PETRI_PLACES=335, PETRI_TRANSITIONS=1264} [2024-01-27 15:36:17,889 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 313 predicate places. [2024-01-27 15:36:17,889 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1264 transitions, 35990 flow [2024-01-27 15:36:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-01-27 15:36:17,889 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:17,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1965996440, now seen corresponding path program 4 times [2024-01-27 15:36:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254162943] [2024-01-27 15:36:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:17,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254162943] [2024-01-27 15:36:17,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254162943] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:17,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340443408] [2024-01-27 15:36:17,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:36:17,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:17,940 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:17,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:36:18,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:36:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:18,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:36:18,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:18,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340443408] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:18,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:18,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-01-27 15:36:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116907416] [2024-01-27 15:36:18,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:36:18,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:36:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:36:18,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:36:18,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1264 transitions, 35990 flow. Second operand has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:18,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:18,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:36:18,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:24,234 INFO L124 PetriNetUnfolderBase]: 7231/13275 cut-off events. [2024-01-27 15:36:24,234 INFO L125 PetriNetUnfolderBase]: For 535463/535463 co-relation queries the response was YES. [2024-01-27 15:36:24,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145227 conditions, 13275 events. 7231/13275 cut-off events. For 535463/535463 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 106770 event pairs, 638 based on Foata normal form. 200/13473 useless extension candidates. Maximal degree in co-relation 144313. Up to 3385 conditions per place. [2024-01-27 15:36:24,405 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 950 selfloop transitions, 1167 changer transitions 0/2120 dead transitions. [2024-01-27 15:36:24,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2120 transitions, 63494 flow [2024-01-27 15:36:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-27 15:36:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-27 15:36:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 276 transitions. [2024-01-27 15:36:24,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-01-27 15:36:24,406 INFO L175 Difference]: Start difference. First operand has 335 places, 1264 transitions, 35990 flow. Second operand 23 states and 276 transitions. [2024-01-27 15:36:24,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2120 transitions, 63494 flow [2024-01-27 15:36:28,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 2120 transitions, 61464 flow, removed 496 selfloop flow, removed 10 redundant places. [2024-01-27 15:36:28,212 INFO L231 Difference]: Finished difference. Result has 351 places, 1773 transitions, 55450 flow [2024-01-27 15:36:28,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=34703, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=722, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=55450, PETRI_PLACES=351, PETRI_TRANSITIONS=1773} [2024-01-27 15:36:28,213 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 329 predicate places. [2024-01-27 15:36:28,213 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1773 transitions, 55450 flow [2024-01-27 15:36:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:28,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:28,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:28,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-27 15:36:28,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:28,424 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:28,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1947915088, now seen corresponding path program 5 times [2024-01-27 15:36:28,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:28,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227398761] [2024-01-27 15:36:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:28,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:28,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227398761] [2024-01-27 15:36:28,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227398761] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:28,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183251401] [2024-01-27 15:36:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:36:28,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:28,472 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:28,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:36:28,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:36:28,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:28,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:36:28,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:28,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183251401] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:28,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2024-01-27 15:36:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746274745] [2024-01-27 15:36:28,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:28,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:36:28,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:36:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:36:28,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-01-27 15:36:28,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1773 transitions, 55450 flow. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:28,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:28,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-01-27 15:36:28,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:36,003 INFO L124 PetriNetUnfolderBase]: 6985/12847 cut-off events. [2024-01-27 15:36:36,004 INFO L125 PetriNetUnfolderBase]: For 556552/556552 co-relation queries the response was YES. [2024-01-27 15:36:36,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145828 conditions, 12847 events. 6985/12847 cut-off events. For 556552/556552 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 103582 event pairs, 127 based on Foata normal form. 128/12972 useless extension candidates. Maximal degree in co-relation 144724. Up to 2987 conditions per place. [2024-01-27 15:36:36,159 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 1282 selfloop transitions, 949 changer transitions 0/2234 dead transitions. [2024-01-27 15:36:36,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2234 transitions, 67953 flow [2024-01-27 15:36:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:36:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:36:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 279 transitions. [2024-01-27 15:36:36,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-01-27 15:36:36,160 INFO L175 Difference]: Start difference. First operand has 351 places, 1773 transitions, 55450 flow. Second operand 25 states and 279 transitions. [2024-01-27 15:36:36,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 2234 transitions, 67953 flow