./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.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/chl-chromosome-subst.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 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:19:37,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:19:37,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:19:37,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:19:37,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:19:37,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:19:37,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:19:37,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:19:37,205 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:19:37,205 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:19:37,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:19:37,206 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:19:37,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:19:37,206 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:19:37,207 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:19:37,207 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:19:37,207 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:19:37,207 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:19:37,208 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:19:37,208 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:19:37,208 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:19:37,209 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:19:37,209 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:19:37,209 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:19:37,209 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:19:37,210 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:19:37,210 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:19:37,213 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:19:37,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:19:37,214 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:19:37,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:19:37,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:19:37,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:37,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:19:37,215 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:19:37,216 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:19:37,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:19:37,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:19:37,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-01-27 15:19:37,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:19:37,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:19:37,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:19:37,426 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:19:37,426 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:19:37,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2024-01-27 15:19:38,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:19:38,670 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:19:38,671 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-subst.wvr.c [2024-01-27 15:19:38,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791756e89/d0261ce697844eb1b0b9b913f9e7af03/FLAGcdecaa88c [2024-01-27 15:19:38,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791756e89/d0261ce697844eb1b0b9b913f9e7af03 [2024-01-27 15:19:38,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:19:38,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:19:38,689 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:38,689 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:19:38,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:19:38,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:38,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f098a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38, skipping insertion in model container [2024-01-27 15:19:38,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:38,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:19:38,865 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/chl-chromosome-subst.wvr.c[3136,3149] [2024-01-27 15:19:38,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:38,891 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:19:38,924 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/chl-chromosome-subst.wvr.c[3136,3149] [2024-01-27 15:19:38,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:19:38,942 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:19:38,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38 WrapperNode [2024-01-27 15:19:38,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:19:38,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:38,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:19:38,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:19:38,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:38,959 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:38,993 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 286 [2024-01-27 15:19:38,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:19:38,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:19:38,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:19:38,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:19:39,002 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,016 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,034 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 2, 9, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 3, 1]. [2024-01-27 15:19:39,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,104 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:19:39,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:19:39,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:19:39,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:19:39,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (1/1) ... [2024-01-27 15:19:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:19:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:39,181 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 15:19:39,206 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 15:19:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:19:39,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:19:39,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:19:39,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:19:39,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:19:39,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:19:39,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:19:39,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:19:39,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:19:39,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:19:39,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:19:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:19:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:19:39,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:19:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:19:39,240 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 15:19:39,326 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:19:39,327 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:19:39,659 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:19:39,659 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:19:39,940 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:19:39,940 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 15:19:39,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:39 BoogieIcfgContainer [2024-01-27 15:19:39,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:19:39,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:19:39,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:19:39,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:19:39,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:19:38" (1/3) ... [2024-01-27 15:19:39,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62585025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:39, skipping insertion in model container [2024-01-27 15:19:39,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:19:38" (2/3) ... [2024-01-27 15:19:39,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62585025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:19:39, skipping insertion in model container [2024-01-27 15:19:39,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:19:39" (3/3) ... [2024-01-27 15:19:39,948 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-01-27 15:19:39,955 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:19:39,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:19:39,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:19:39,962 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:19:40,009 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:19:40,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:19:40,068 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-01-27 15:19:40,069 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:19:40,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-01-27 15:19:40,072 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2024-01-27 15:19:40,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2024-01-27 15:19:40,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:19:40,097 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;@298b23f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:19:40,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:19:40,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:19:40,109 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-01-27 15:19:40,109 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:19:40,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:40,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:40,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:40,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -730733625, now seen corresponding path program 1 times [2024-01-27 15:19:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:40,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141858280] [2024-01-27 15:19:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:40,610 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 15:19:40,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141858280] [2024-01-27 15:19:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141858280] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:40,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:19:40,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177662920] [2024-01-27 15:19:40,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:19:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:19:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:19:40,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:40,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 15:19:40,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:40,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:40,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:40,792 INFO L124 PetriNetUnfolderBase]: 223/335 cut-off events. [2024-01-27 15:19:40,792 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 15:19:40,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 335 events. 223/335 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2024-01-27 15:19:40,799 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2024-01-27 15:19:40,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 144 flow [2024-01-27 15:19:40,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:19:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:19:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-01-27 15:19:40,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-01-27 15:19:40,809 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 46 transitions. [2024-01-27 15:19:40,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 144 flow [2024-01-27 15:19:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:19:40,815 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 96 flow [2024-01-27 15:19:40,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-27 15:19:40,819 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-27 15:19:40,820 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 96 flow [2024-01-27 15:19:40,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 15:19:40,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:40,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:40,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:19:40,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:40,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash -307594314, now seen corresponding path program 1 times [2024-01-27 15:19:40,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:40,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852342083] [2024-01-27 15:19:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:40,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:41,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:41,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852342083] [2024-01-27 15:19:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852342083] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:41,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:41,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:19:41,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897777848] [2024-01-27 15:19:41,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:41,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:19:41,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:19:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:19:41,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:41,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:19:41,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:41,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:41,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:41,177 INFO L124 PetriNetUnfolderBase]: 383/572 cut-off events. [2024-01-27 15:19:41,177 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 15:19:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 572 events. 383/572 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1734 event pairs, 138 based on Foata normal form. 1/422 useless extension candidates. Maximal degree in co-relation 1150. Up to 335 conditions per place. [2024-01-27 15:19:41,183 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 41 selfloop transitions, 2 changer transitions 6/50 dead transitions. [2024-01-27 15:19:41,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 50 transitions, 235 flow [2024-01-27 15:19:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:19:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:19:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-01-27 15:19:41,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-01-27 15:19:41,185 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 96 flow. Second operand 3 states and 59 transitions. [2024-01-27 15:19:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 50 transitions, 235 flow [2024-01-27 15:19:41,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 50 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:41,190 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 102 flow [2024-01-27 15:19:41,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2024-01-27 15:19:41,193 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2024-01-27 15:19:41,193 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 102 flow [2024-01-27 15:19:41,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:19:41,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:41,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:41,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:19:41,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:41,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash 382050815, now seen corresponding path program 1 times [2024-01-27 15:19:41,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:41,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535850871] [2024-01-27 15:19:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:41,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535850871] [2024-01-27 15:19:41,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535850871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:41,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277061657] [2024-01-27 15:19:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:41,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:41,305 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 15:19:41,316 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 15:19:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:41,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 15:19:41,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:41,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:19:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277061657] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:41,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:41,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-01-27 15:19:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967033683] [2024-01-27 15:19:41,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:41,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:19:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:19:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:19:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:41,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 15:19:41,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:41,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:41,599 INFO L124 PetriNetUnfolderBase]: 383/581 cut-off events. [2024-01-27 15:19:41,600 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2024-01-27 15:19:41,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 581 events. 383/581 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1621 event pairs, 256 based on Foata normal form. 0/480 useless extension candidates. Maximal degree in co-relation 1249. Up to 569 conditions per place. [2024-01-27 15:19:41,602 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 26 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2024-01-27 15:19:41,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 220 flow [2024-01-27 15:19:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:19:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:19:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2024-01-27 15:19:41,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686868686868687 [2024-01-27 15:19:41,603 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 102 flow. Second operand 6 states and 73 transitions. [2024-01-27 15:19:41,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 220 flow [2024-01-27 15:19:41,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:41,605 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 196 flow [2024-01-27 15:19:41,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2024-01-27 15:19:41,605 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-01-27 15:19:41,606 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 196 flow [2024-01-27 15:19:41,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 15:19:41,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:41,606 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:41,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:19:41,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:41,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:41,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1698389562, now seen corresponding path program 2 times [2024-01-27 15:19:41,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923266428] [2024-01-27 15:19:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923266428] [2024-01-27 15:19:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923266428] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:42,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065374209] [2024-01-27 15:19:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:42,031 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 15:19:42,059 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 15:19:42,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-27 15:19:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:42,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:19:42,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:42,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:42,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065374209] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:42,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:42,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-01-27 15:19:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863842099] [2024-01-27 15:19:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:42,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:19:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:19:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:19:42,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:42,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:19:42,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:42,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:42,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:42,379 INFO L124 PetriNetUnfolderBase]: 773/1157 cut-off events. [2024-01-27 15:19:42,380 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-01-27 15:19:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1157 events. 773/1157 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4234 event pairs, 256 based on Foata normal form. 1/914 useless extension candidates. Maximal degree in co-relation 2463. Up to 609 conditions per place. [2024-01-27 15:19:42,384 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 67 selfloop transitions, 5 changer transitions 1/74 dead transitions. [2024-01-27 15:19:42,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 74 transitions, 427 flow [2024-01-27 15:19:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-01-27 15:19:42,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-01-27 15:19:42,385 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 196 flow. Second operand 4 states and 75 transitions. [2024-01-27 15:19:42,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 74 transitions, 427 flow [2024-01-27 15:19:42,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 74 transitions, 403 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:42,387 INFO L231 Difference]: Finished difference. Result has 43 places, 46 transitions, 205 flow [2024-01-27 15:19:42,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2024-01-27 15:19:42,388 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2024-01-27 15:19:42,388 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 205 flow [2024-01-27 15:19:42,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:19:42,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:42,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:42,403 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 15:19:42,600 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,SelfDestructingSolverStorable3 [2024-01-27 15:19:42,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:42,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash 726961786, now seen corresponding path program 3 times [2024-01-27 15:19:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:42,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292351186] [2024-01-27 15:19:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:42,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:19:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292351186] [2024-01-27 15:19:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292351186] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240582886] [2024-01-27 15:19:42,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:42,758 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 15:19:42,784 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 15:19:42,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-27 15:19:42,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:42,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:19:42,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-01-27 15:19:42,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:42,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240582886] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:42,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:42,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-01-27 15:19:42,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426325312] [2024-01-27 15:19:42,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:42,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:19:42,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:19:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:19:42,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:42,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:19:42,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:42,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:42,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:43,117 INFO L124 PetriNetUnfolderBase]: 1119/1665 cut-off events. [2024-01-27 15:19:43,117 INFO L125 PetriNetUnfolderBase]: For 783/783 co-relation queries the response was YES. [2024-01-27 15:19:43,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4328 conditions, 1665 events. 1119/1665 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6500 event pairs, 426 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 4248. Up to 982 conditions per place. [2024-01-27 15:19:43,124 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 67 selfloop transitions, 7 changer transitions 1/76 dead transitions. [2024-01-27 15:19:43,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 449 flow [2024-01-27 15:19:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:19:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:19:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-01-27 15:19:43,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-01-27 15:19:43,125 INFO L175 Difference]: Start difference. First operand has 43 places, 46 transitions, 205 flow. Second operand 4 states and 73 transitions. [2024-01-27 15:19:43,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 449 flow [2024-01-27 15:19:43,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:19:43,128 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 254 flow [2024-01-27 15:19:43,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2024-01-27 15:19:43,129 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 15 predicate places. [2024-01-27 15:19:43,129 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 254 flow [2024-01-27 15:19:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 15:19:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:43,142 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 15:19:43,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:43,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:43,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:43,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2093781322, now seen corresponding path program 1 times [2024-01-27 15:19:43,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:43,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299329749] [2024-01-27 15:19:43,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:43,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-01-27 15:19:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299329749] [2024-01-27 15:19:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299329749] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348350080] [2024-01-27 15:19:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:43,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:43,532 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 15:19:43,569 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 15:19:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:43,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:19:43,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-01-27 15:19:43,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-01-27 15:19:43,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348350080] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:43,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:43,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-01-27 15:19:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883308485] [2024-01-27 15:19:43,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:19:43,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:19:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:19:43,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 254 flow. Second operand has 17 states, 17 states have (on average 6.705882352941177) internal successors, (114), 17 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,018 INFO L124 PetriNetUnfolderBase]: 1119/1668 cut-off events. [2024-01-27 15:19:44,018 INFO L125 PetriNetUnfolderBase]: For 1866/1866 co-relation queries the response was YES. [2024-01-27 15:19:44,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 1668 events. 1119/1668 cut-off events. For 1866/1866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6406 event pairs, 768 based on Foata normal form. 1/1667 useless extension candidates. Maximal degree in co-relation 4843. Up to 1651 conditions per place. [2024-01-27 15:19:44,025 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 34 selfloop transitions, 18 changer transitions 0/53 dead transitions. [2024-01-27 15:19:44,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 376 flow [2024-01-27 15:19:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:19:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:19:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-01-27 15:19:44,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3203463203463203 [2024-01-27 15:19:44,026 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 254 flow. Second operand 7 states and 74 transitions. [2024-01-27 15:19:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 376 flow [2024-01-27 15:19:44,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 374 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-01-27 15:19:44,030 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 320 flow [2024-01-27 15:19:44,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-01-27 15:19:44,031 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2024-01-27 15:19:44,031 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 320 flow [2024-01-27 15:19:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.705882352941177) internal successors, (114), 17 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:44,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,031 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,058 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 15:19:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:44,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2057163303, now seen corresponding path program 2 times [2024-01-27 15:19:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794528191] [2024-01-27 15:19:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:44,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794528191] [2024-01-27 15:19:44,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794528191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:44,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141642230] [2024-01-27 15:19:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:44,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:44,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:44,471 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 15:19:44,475 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 15:19:44,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:19:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:44,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:44,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:44,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141642230] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:44,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:44,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-01-27 15:19:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812742416] [2024-01-27 15:19:44,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:44,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:44,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:19:44,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:44,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:44,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:44,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:44,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:44,953 INFO L124 PetriNetUnfolderBase]: 1189/1770 cut-off events. [2024-01-27 15:19:44,953 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2024-01-27 15:19:44,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 1770 events. 1189/1770 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7274 event pairs, 124 based on Foata normal form. 32/1802 useless extension candidates. Maximal degree in co-relation 5143. Up to 753 conditions per place. [2024-01-27 15:19:44,960 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 84 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2024-01-27 15:19:44,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 94 transitions, 645 flow [2024-01-27 15:19:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-01-27 15:19:44,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-01-27 15:19:44,962 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 320 flow. Second operand 5 states and 88 transitions. [2024-01-27 15:19:44,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 94 transitions, 645 flow [2024-01-27 15:19:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 609 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-27 15:19:44,965 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 331 flow [2024-01-27 15:19:44,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-01-27 15:19:44,966 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-01-27 15:19:44,966 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 331 flow [2024-01-27 15:19:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:44,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:44,966 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:44,978 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 15:19:45,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:45,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -94401587, now seen corresponding path program 1 times [2024-01-27 15:19:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:45,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635184430] [2024-01-27 15:19:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:45,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:45,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635184430] [2024-01-27 15:19:45,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635184430] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:45,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328496233] [2024-01-27 15:19:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:45,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:45,435 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 15:19:45,464 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 15:19:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:45,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:19:45,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:45,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:45,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328496233] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:45,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:45,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-01-27 15:19:45,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47922904] [2024-01-27 15:19:45,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:45,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:19:45,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:19:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:19:45,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:45,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 15:19:45,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:46,377 INFO L124 PetriNetUnfolderBase]: 2701/4005 cut-off events. [2024-01-27 15:19:46,377 INFO L125 PetriNetUnfolderBase]: For 9650/9650 co-relation queries the response was YES. [2024-01-27 15:19:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13053 conditions, 4005 events. 2701/4005 cut-off events. For 9650/9650 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19807 event pairs, 422 based on Foata normal form. 9/4014 useless extension candidates. Maximal degree in co-relation 12951. Up to 1023 conditions per place. [2024-01-27 15:19:46,391 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 136 selfloop transitions, 5 changer transitions 87/229 dead transitions. [2024-01-27 15:19:46,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 229 transitions, 1846 flow [2024-01-27 15:19:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:19:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:19:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-01-27 15:19:46,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791245791245792 [2024-01-27 15:19:46,393 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 331 flow. Second operand 9 states and 172 transitions. [2024-01-27 15:19:46,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 229 transitions, 1846 flow [2024-01-27 15:19:46,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 229 transitions, 1740 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:46,401 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 358 flow [2024-01-27 15:19:46,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=358, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-01-27 15:19:46,403 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2024-01-27 15:19:46,403 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 358 flow [2024-01-27 15:19:46,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 15:19:46,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:46,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:46,430 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 15:19:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:46,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1735129404, now seen corresponding path program 2 times [2024-01-27 15:19:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833590338] [2024-01-27 15:19:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:46,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833590338] [2024-01-27 15:19:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833590338] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623293085] [2024-01-27 15:19:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:19:46,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:46,951 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 15:19:46,974 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 15:19:47,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:19:47,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:47,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:47,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:19:47,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:19:47,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623293085] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:47,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:19:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2024-01-27 15:19:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088657295] [2024-01-27 15:19:47,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:47,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:19:47,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:47,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:47,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:47,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:47,536 INFO L124 PetriNetUnfolderBase]: 1816/2659 cut-off events. [2024-01-27 15:19:47,536 INFO L125 PetriNetUnfolderBase]: For 5758/5758 co-relation queries the response was YES. [2024-01-27 15:19:47,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 2659 events. 1816/2659 cut-off events. For 5758/5758 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11214 event pairs, 347 based on Foata normal form. 40/2699 useless extension candidates. Maximal degree in co-relation 9749. Up to 1063 conditions per place. [2024-01-27 15:19:47,549 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 92 selfloop transitions, 11 changer transitions 0/104 dead transitions. [2024-01-27 15:19:47,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 813 flow [2024-01-27 15:19:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:19:47,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-01-27 15:19:47,550 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 358 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:19:47,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 813 flow [2024-01-27 15:19:47,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 104 transitions, 745 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-01-27 15:19:47,558 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 392 flow [2024-01-27 15:19:47,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-01-27 15:19:47,558 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 35 predicate places. [2024-01-27 15:19:47,558 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 392 flow [2024-01-27 15:19:47,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:47,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:47,559 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:47,573 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 15:19:47,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:47,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:47,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -298930788, now seen corresponding path program 3 times [2024-01-27 15:19:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:47,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381348637] [2024-01-27 15:19:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:47,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381348637] [2024-01-27 15:19:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381348637] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580177456] [2024-01-27 15:19:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:48,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:48,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:48,028 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 15:19:48,044 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 15:19:48,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:19:48,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:48,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:48,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:48,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:48,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580177456] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:48,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-01-27 15:19:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059620502] [2024-01-27 15:19:48,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:19:48,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:48,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:48,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:48,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:48,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:48,686 INFO L124 PetriNetUnfolderBase]: 1856/2749 cut-off events. [2024-01-27 15:19:48,686 INFO L125 PetriNetUnfolderBase]: For 7175/7175 co-relation queries the response was YES. [2024-01-27 15:19:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10377 conditions, 2749 events. 1856/2749 cut-off events. For 7175/7175 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12188 event pairs, 583 based on Foata normal form. 24/2773 useless extension candidates. Maximal degree in co-relation 10268. Up to 1490 conditions per place. [2024-01-27 15:19:48,705 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 84 selfloop transitions, 8 changer transitions 17/110 dead transitions. [2024-01-27 15:19:48,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 832 flow [2024-01-27 15:19:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-01-27 15:19:48,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-01-27 15:19:48,706 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 392 flow. Second operand 5 states and 87 transitions. [2024-01-27 15:19:48,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 832 flow [2024-01-27 15:19:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 810 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:48,718 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 409 flow [2024-01-27 15:19:48,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-01-27 15:19:48,719 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2024-01-27 15:19:48,719 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 409 flow [2024-01-27 15:19:48,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:48,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:48,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:48,744 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 15:19:48,931 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,SelfDestructingSolverStorable9 [2024-01-27 15:19:48,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:48,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash -400219980, now seen corresponding path program 4 times [2024-01-27 15:19:48,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:48,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175656864] [2024-01-27 15:19:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:48,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:49,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:49,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175656864] [2024-01-27 15:19:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175656864] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868537157] [2024-01-27 15:19:49,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:19:49,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:49,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:49,217 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 15:19:49,219 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 15:19:49,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:19:49,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:49,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-27 15:19:49,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:49,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868537157] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:19:49,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:19:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-01-27 15:19:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806247868] [2024-01-27 15:19:49,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:19:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:19:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:49,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:19:49,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:19:49,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:49,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 409 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:19:49,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:49,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:49,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:50,108 INFO L124 PetriNetUnfolderBase]: 2316/3412 cut-off events. [2024-01-27 15:19:50,108 INFO L125 PetriNetUnfolderBase]: For 13364/13364 co-relation queries the response was YES. [2024-01-27 15:19:50,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14045 conditions, 3412 events. 2316/3412 cut-off events. For 13364/13364 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15800 event pairs, 440 based on Foata normal form. 3/3415 useless extension candidates. Maximal degree in co-relation 13933. Up to 1067 conditions per place. [2024-01-27 15:19:50,126 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 175 selfloop transitions, 6 changer transitions 36/218 dead transitions. [2024-01-27 15:19:50,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 218 transitions, 2061 flow [2024-01-27 15:19:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:19:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:19:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-01-27 15:19:50,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-27 15:19:50,128 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 409 flow. Second operand 8 states and 144 transitions. [2024-01-27 15:19:50,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 218 transitions, 2061 flow [2024-01-27 15:19:50,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 218 transitions, 1942 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:50,141 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 418 flow [2024-01-27 15:19:50,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-01-27 15:19:50,142 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-01-27 15:19:50,142 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 418 flow [2024-01-27 15:19:50,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:19:50,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:50,143 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:50,156 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 15:19:50,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:50,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:50,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:50,356 INFO L85 PathProgramCache]: Analyzing trace with hash 86335005, now seen corresponding path program 5 times [2024-01-27 15:19:50,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:50,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935849044] [2024-01-27 15:19:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:50,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-01-27 15:19:50,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:50,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935849044] [2024-01-27 15:19:50,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935849044] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:50,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:50,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:50,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518956864] [2024-01-27 15:19:50,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:50,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:50,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:50,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:50,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:50,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:50,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 418 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:50,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:50,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:50,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:50,942 INFO L124 PetriNetUnfolderBase]: 1951/2872 cut-off events. [2024-01-27 15:19:50,942 INFO L125 PetriNetUnfolderBase]: For 9103/9103 co-relation queries the response was YES. [2024-01-27 15:19:50,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11919 conditions, 2872 events. 1951/2872 cut-off events. For 9103/9103 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12543 event pairs, 676 based on Foata normal form. 26/2898 useless extension candidates. Maximal degree in co-relation 11869. Up to 1639 conditions per place. [2024-01-27 15:19:50,955 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 83 selfloop transitions, 9 changer transitions 16/109 dead transitions. [2024-01-27 15:19:50,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 892 flow [2024-01-27 15:19:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-01-27 15:19:50,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-01-27 15:19:50,957 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 418 flow. Second operand 5 states and 86 transitions. [2024-01-27 15:19:50,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 892 flow [2024-01-27 15:19:50,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 109 transitions, 824 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-01-27 15:19:50,969 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 423 flow [2024-01-27 15:19:50,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-01-27 15:19:50,970 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 44 predicate places. [2024-01-27 15:19:50,970 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 423 flow [2024-01-27 15:19:50,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:50,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:50,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:50,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:19:50,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:50,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1702946155, now seen corresponding path program 6 times [2024-01-27 15:19:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:50,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419770741] [2024-01-27 15:19:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:50,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419770741] [2024-01-27 15:19:51,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419770741] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:51,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:51,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667052409] [2024-01-27 15:19:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:51,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:51,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:51,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:51,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:51,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:51,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:51,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:51,536 INFO L124 PetriNetUnfolderBase]: 1969/2880 cut-off events. [2024-01-27 15:19:51,536 INFO L125 PetriNetUnfolderBase]: For 9716/9716 co-relation queries the response was YES. [2024-01-27 15:19:51,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 2880 events. 1969/2880 cut-off events. For 9716/9716 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12279 event pairs, 728 based on Foata normal form. 44/2924 useless extension candidates. Maximal degree in co-relation 11949. Up to 1683 conditions per place. [2024-01-27 15:19:51,550 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 96 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-01-27 15:19:51,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 107 transitions, 846 flow [2024-01-27 15:19:51,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:19:51,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-01-27 15:19:51,552 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 423 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:19:51,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 107 transitions, 846 flow [2024-01-27 15:19:51,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 822 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:51,567 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 438 flow [2024-01-27 15:19:51,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-01-27 15:19:51,567 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-01-27 15:19:51,567 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 438 flow [2024-01-27 15:19:51,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:51,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:51,568 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:19:51,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:51,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1252006441, now seen corresponding path program 3 times [2024-01-27 15:19:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:51,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316956881] [2024-01-27 15:19:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316956881] [2024-01-27 15:19:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316956881] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083261070] [2024-01-27 15:19:51,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:19:51,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:51,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:51,745 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 15:19:51,788 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 15:19:52,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:19:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:52,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:52,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:52,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:52,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083261070] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:52,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:52,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-01-27 15:19:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832549325] [2024-01-27 15:19:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:52,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:19:52,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:52,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:52,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:52,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:52,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:52,640 INFO L124 PetriNetUnfolderBase]: 2251/3310 cut-off events. [2024-01-27 15:19:52,640 INFO L125 PetriNetUnfolderBase]: For 10777/10777 co-relation queries the response was YES. [2024-01-27 15:19:52,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13873 conditions, 3310 events. 2251/3310 cut-off events. For 10777/10777 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14853 event pairs, 260 based on Foata normal form. 48/3358 useless extension candidates. Maximal degree in co-relation 13759. Up to 2326 conditions per place. [2024-01-27 15:19:52,656 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 100 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2024-01-27 15:19:52,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 902 flow [2024-01-27 15:19:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-01-27 15:19:52,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-01-27 15:19:52,658 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 438 flow. Second operand 5 states and 85 transitions. [2024-01-27 15:19:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 902 flow [2024-01-27 15:19:52,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 874 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:52,676 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 478 flow [2024-01-27 15:19:52,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=478, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-01-27 15:19:52,677 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-01-27 15:19:52,677 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 478 flow [2024-01-27 15:19:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:52,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:52,677 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:52,690 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 15:19:52,889 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 15:19:52,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash -95551177, now seen corresponding path program 4 times [2024-01-27 15:19:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:52,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471894242] [2024-01-27 15:19:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:52,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:53,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471894242] [2024-01-27 15:19:53,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471894242] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:53,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:53,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:53,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041389063] [2024-01-27 15:19:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:53,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:53,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:53,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 478 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:53,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:53,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:53,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:53,558 INFO L124 PetriNetUnfolderBase]: 2167/3174 cut-off events. [2024-01-27 15:19:53,559 INFO L125 PetriNetUnfolderBase]: For 12257/12257 co-relation queries the response was YES. [2024-01-27 15:19:53,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13880 conditions, 3174 events. 2167/3174 cut-off events. For 12257/12257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13993 event pairs, 866 based on Foata normal form. 22/3196 useless extension candidates. Maximal degree in co-relation 13763. Up to 1977 conditions per place. [2024-01-27 15:19:53,575 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 10 changer transitions 12/108 dead transitions. [2024-01-27 15:19:53,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 880 flow [2024-01-27 15:19:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-01-27 15:19:53,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-01-27 15:19:53,576 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 478 flow. Second operand 5 states and 81 transitions. [2024-01-27 15:19:53,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 880 flow [2024-01-27 15:19:53,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 871 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:19:53,600 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 494 flow [2024-01-27 15:19:53,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=494, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2024-01-27 15:19:53,601 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2024-01-27 15:19:53,602 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 494 flow [2024-01-27 15:19:53,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:53,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:53,602 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:53,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-27 15:19:53,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:53,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 662010621, now seen corresponding path program 7 times [2024-01-27 15:19:53,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:53,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964688208] [2024-01-27 15:19:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:19:53,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:53,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964688208] [2024-01-27 15:19:53,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964688208] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:53,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:53,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720799921] [2024-01-27 15:19:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:53,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 494 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:54,134 INFO L124 PetriNetUnfolderBase]: 2110/3095 cut-off events. [2024-01-27 15:19:54,134 INFO L125 PetriNetUnfolderBase]: For 13827/13827 co-relation queries the response was YES. [2024-01-27 15:19:54,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14202 conditions, 3095 events. 2110/3095 cut-off events. For 13827/13827 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13314 event pairs, 846 based on Foata normal form. 26/3121 useless extension candidates. Maximal degree in co-relation 14084. Up to 1949 conditions per place. [2024-01-27 15:19:54,149 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 84 selfloop transitions, 11 changer transitions 16/112 dead transitions. [2024-01-27 15:19:54,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 937 flow [2024-01-27 15:19:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:19:54,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-01-27 15:19:54,150 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 494 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:19:54,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 937 flow [2024-01-27 15:19:54,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 915 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:54,176 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 499 flow [2024-01-27 15:19:54,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-01-27 15:19:54,176 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 53 predicate places. [2024-01-27 15:19:54,176 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 499 flow [2024-01-27 15:19:54,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:54,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:54,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-27 15:19:54,177 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:54,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash -919409777, now seen corresponding path program 8 times [2024-01-27 15:19:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:54,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502541788] [2024-01-27 15:19:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:54,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:19:54,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502541788] [2024-01-27 15:19:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502541788] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:54,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:54,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9510685] [2024-01-27 15:19:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:54,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:54,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:54,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:54,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:54,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:54,688 INFO L124 PetriNetUnfolderBase]: 1908/2783 cut-off events. [2024-01-27 15:19:54,689 INFO L125 PetriNetUnfolderBase]: For 13475/13475 co-relation queries the response was YES. [2024-01-27 15:19:54,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12924 conditions, 2783 events. 1908/2783 cut-off events. For 13475/13475 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11507 event pairs, 704 based on Foata normal form. 44/2827 useless extension candidates. Maximal degree in co-relation 12805. Up to 1652 conditions per place. [2024-01-27 15:19:54,700 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 96 selfloop transitions, 12 changer transitions 1/110 dead transitions. [2024-01-27 15:19:54,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 933 flow [2024-01-27 15:19:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-01-27 15:19:54,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49696969696969695 [2024-01-27 15:19:54,702 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 499 flow. Second operand 5 states and 82 transitions. [2024-01-27 15:19:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 933 flow [2024-01-27 15:19:54,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 907 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:54,724 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 500 flow [2024-01-27 15:19:54,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2024-01-27 15:19:54,725 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-01-27 15:19:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 500 flow [2024-01-27 15:19:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:19:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:54,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-27 15:19:54,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:54,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash -873852903, now seen corresponding path program 5 times [2024-01-27 15:19:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570663808] [2024-01-27 15:19:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:54,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:54,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570663808] [2024-01-27 15:19:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570663808] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:54,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:54,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:54,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469447601] [2024-01-27 15:19:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:54,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:54,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:54,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:55,219 INFO L124 PetriNetUnfolderBase]: 1850/2703 cut-off events. [2024-01-27 15:19:55,220 INFO L125 PetriNetUnfolderBase]: For 12707/12707 co-relation queries the response was YES. [2024-01-27 15:19:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12606 conditions, 2703 events. 1850/2703 cut-off events. For 12707/12707 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11277 event pairs, 651 based on Foata normal form. 22/2725 useless extension candidates. Maximal degree in co-relation 12486. Up to 1669 conditions per place. [2024-01-27 15:19:55,233 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 89 selfloop transitions, 10 changer transitions 12/112 dead transitions. [2024-01-27 15:19:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 949 flow [2024-01-27 15:19:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-01-27 15:19:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-01-27 15:19:55,235 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 500 flow. Second operand 5 states and 81 transitions. [2024-01-27 15:19:55,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 949 flow [2024-01-27 15:19:55,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 896 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-27 15:19:55,258 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 500 flow [2024-01-27 15:19:55,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-01-27 15:19:55,258 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2024-01-27 15:19:55,258 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 500 flow [2024-01-27 15:19:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:55,259 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:55,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-27 15:19:55,259 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:55,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:55,260 INFO L85 PathProgramCache]: Analyzing trace with hash 679716365, now seen corresponding path program 6 times [2024-01-27 15:19:55,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:55,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782003057] [2024-01-27 15:19:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:55,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782003057] [2024-01-27 15:19:55,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782003057] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091799855] [2024-01-27 15:19:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:19:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:55,407 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 15:19:55,420 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 15:19:55,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:19:55,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:19:55,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 15:19:55,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:55,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:19:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091799855] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:55,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:19:55,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-01-27 15:19:55,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015828575] [2024-01-27 15:19:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:55,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:55,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-27 15:19:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:55,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 500 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:55,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:55,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:56,060 INFO L124 PetriNetUnfolderBase]: 1771/2602 cut-off events. [2024-01-27 15:19:56,060 INFO L125 PetriNetUnfolderBase]: For 12450/12450 co-relation queries the response was YES. [2024-01-27 15:19:56,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12181 conditions, 2602 events. 1771/2602 cut-off events. For 12450/12450 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10818 event pairs, 651 based on Foata normal form. 48/2650 useless extension candidates. Maximal degree in co-relation 12062. Up to 1669 conditions per place. [2024-01-27 15:19:56,079 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 98 selfloop transitions, 12 changer transitions 1/112 dead transitions. [2024-01-27 15:19:56,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 940 flow [2024-01-27 15:19:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-01-27 15:19:56,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-01-27 15:19:56,081 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 500 flow. Second operand 5 states and 84 transitions. [2024-01-27 15:19:56,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 940 flow [2024-01-27 15:19:56,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 916 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-27 15:19:56,103 INFO L231 Difference]: Finished difference. Result has 87 places, 68 transitions, 520 flow [2024-01-27 15:19:56,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2024-01-27 15:19:56,103 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2024-01-27 15:19:56,104 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 520 flow [2024-01-27 15:19:56,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:56,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:56,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:56,115 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 15:19:56,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:56,316 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:56,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 442304401, now seen corresponding path program 7 times [2024-01-27 15:19:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783491979] [2024-01-27 15:19:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-01-27 15:19:56,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783491979] [2024-01-27 15:19:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783491979] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:19:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:19:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:19:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366164601] [2024-01-27 15:19:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:19:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:19:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:19:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:19:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:19:56,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:19:56,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:56,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:19:56,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:19:56,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:19:56,828 INFO L124 PetriNetUnfolderBase]: 1687/2466 cut-off events. [2024-01-27 15:19:56,828 INFO L125 PetriNetUnfolderBase]: For 11236/11236 co-relation queries the response was YES. [2024-01-27 15:19:56,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11345 conditions, 2466 events. 1687/2466 cut-off events. For 11236/11236 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10059 event pairs, 651 based on Foata normal form. 22/2488 useless extension candidates. Maximal degree in co-relation 11226. Up to 1669 conditions per place. [2024-01-27 15:19:56,840 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 80 selfloop transitions, 12 changer transitions 13/106 dead transitions. [2024-01-27 15:19:56,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 106 transitions, 912 flow [2024-01-27 15:19:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:19:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:19:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-01-27 15:19:56,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-27 15:19:56,841 INFO L175 Difference]: Start difference. First operand has 87 places, 68 transitions, 520 flow. Second operand 5 states and 77 transitions. [2024-01-27 15:19:56,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 106 transitions, 912 flow [2024-01-27 15:19:56,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 106 transitions, 882 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-01-27 15:19:56,860 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 500 flow [2024-01-27 15:19:56,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-01-27 15:19:56,861 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2024-01-27 15:19:56,861 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 500 flow [2024-01-27 15:19:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 15:19:56,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:19:56,861 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:19:56,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-27 15:19:56,862 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:19:56,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:19:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash 782991579, now seen corresponding path program 1 times [2024-01-27 15:19:56,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:19:56,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128690650] [2024-01-27 15:19:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:19:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-01-27 15:19:58,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:19:58,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128690650] [2024-01-27 15:19:58,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128690650] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:19:58,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631905958] [2024-01-27 15:19:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:19:58,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:19:58,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:19:58,198 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 15:19:58,222 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 15:19:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:19:58,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:19:58,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:19:58,720 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-01-27 15:19:58,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 36 [2024-01-27 15:19:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:19:58,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:15,882 INFO L349 Elim1Store]: treesize reduction 28, result has 84.8 percent of original size [2024-01-27 15:20:15,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 187 [2024-01-27 15:20:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:20:16,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631905958] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:16,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 33 [2024-01-27 15:20:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814919313] [2024-01-27 15:20:16,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:20:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:20:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=939, Unknown=4, NotChecked=0, Total=1056 [2024-01-27 15:20:16,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:16,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 500 flow. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 33 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 15:20:16,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:16,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:21,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:26,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:20:29,091 INFO L124 PetriNetUnfolderBase]: 3499/5116 cut-off events. [2024-01-27 15:20:29,092 INFO L125 PetriNetUnfolderBase]: For 20318/20318 co-relation queries the response was YES. [2024-01-27 15:20:29,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22481 conditions, 5116 events. 3499/5116 cut-off events. For 20318/20318 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24569 event pairs, 157 based on Foata normal form. 43/5159 useless extension candidates. Maximal degree in co-relation 22362. Up to 1456 conditions per place. [2024-01-27 15:20:29,115 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 284 selfloop transitions, 75 changer transitions 117/477 dead transitions. [2024-01-27 15:20:29,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 477 transitions, 4263 flow [2024-01-27 15:20:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:20:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:20:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 446 transitions. [2024-01-27 15:20:29,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37542087542087543 [2024-01-27 15:20:29,120 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 500 flow. Second operand 36 states and 446 transitions. [2024-01-27 15:20:29,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 477 transitions, 4263 flow [2024-01-27 15:20:29,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 477 transitions, 3939 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-01-27 15:20:29,156 INFO L231 Difference]: Finished difference. Result has 140 places, 137 transitions, 1430 flow [2024-01-27 15:20:29,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1430, PETRI_PLACES=140, PETRI_TRANSITIONS=137} [2024-01-27 15:20:29,157 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 107 predicate places. [2024-01-27 15:20:29,157 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 137 transitions, 1430 flow [2024-01-27 15:20:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 33 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 15:20:29,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:29,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:29,169 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 15:20:29,369 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,SelfDestructingSolverStorable20 [2024-01-27 15:20:29,369 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:20:29,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 901290663, now seen corresponding path program 2 times [2024-01-27 15:20:29,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:29,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686942584] [2024-01-27 15:20:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:29,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:20:30,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686942584] [2024-01-27 15:20:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686942584] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803606852] [2024-01-27 15:20:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:20:30,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:30,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:30,691 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 15:20:30,692 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 15:20:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:20:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:30,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2024-01-27 15:20:30,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:31,240 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:20:31,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2024-01-27 15:20:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:20:31,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:32,289 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:20:32,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:20:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:20:32,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803606852] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:32,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 31 [2024-01-27 15:20:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481518185] [2024-01-27 15:20:32,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:32,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:20:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:20:32,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:20:32,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:32,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 137 transitions, 1430 flow. Second operand has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:20:32,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:32,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:32,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:36,265 INFO L124 PetriNetUnfolderBase]: 5259/7620 cut-off events. [2024-01-27 15:20:36,266 INFO L125 PetriNetUnfolderBase]: For 62437/62437 co-relation queries the response was YES. [2024-01-27 15:20:36,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44670 conditions, 7620 events. 5259/7620 cut-off events. For 62437/62437 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38548 event pairs, 526 based on Foata normal form. 43/7663 useless extension candidates. Maximal degree in co-relation 44526. Up to 3329 conditions per place. [2024-01-27 15:20:36,316 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 318 selfloop transitions, 95 changer transitions 45/459 dead transitions. [2024-01-27 15:20:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 459 transitions, 5225 flow [2024-01-27 15:20:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-27 15:20:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-27 15:20:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 370 transitions. [2024-01-27 15:20:36,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-01-27 15:20:36,319 INFO L175 Difference]: Start difference. First operand has 140 places, 137 transitions, 1430 flow. Second operand 30 states and 370 transitions. [2024-01-27 15:20:36,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 459 transitions, 5225 flow [2024-01-27 15:20:36,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 459 transitions, 4708 flow, removed 179 selfloop flow, removed 13 redundant places. [2024-01-27 15:20:36,494 INFO L231 Difference]: Finished difference. Result has 160 places, 199 transitions, 2268 flow [2024-01-27 15:20:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2268, PETRI_PLACES=160, PETRI_TRANSITIONS=199} [2024-01-27 15:20:36,495 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 127 predicate places. [2024-01-27 15:20:36,495 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 199 transitions, 2268 flow [2024-01-27 15:20:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:20:36,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:36,507 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 15:20:36,696 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,SelfDestructingSolverStorable21 [2024-01-27 15:20:36,697 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:20:36,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash 635560997, now seen corresponding path program 3 times [2024-01-27 15:20:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539483234] [2024-01-27 15:20:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:36,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:20:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539483234] [2024-01-27 15:20:39,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539483234] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52477906] [2024-01-27 15:20:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:20:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:39,465 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 15:20:39,465 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 15:20:39,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:20:39,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:39,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:20:39,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:40,065 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:20:40,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2024-01-27 15:20:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:20:40,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:41,228 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:20:41,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:20:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:20:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52477906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:41,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:41,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 11] total 46 [2024-01-27 15:20:41,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246487593] [2024-01-27 15:20:41,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-01-27 15:20:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:41,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-01-27 15:20:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2024-01-27 15:20:41,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:41,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 199 transitions, 2268 flow. Second operand has 46 states, 46 states have (on average 5.956521739130435) internal successors, (274), 46 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 15:20:41,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:41,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:41,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:45,333 INFO L124 PetriNetUnfolderBase]: 5456/7885 cut-off events. [2024-01-27 15:20:45,334 INFO L125 PetriNetUnfolderBase]: For 80449/80449 co-relation queries the response was YES. [2024-01-27 15:20:45,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50614 conditions, 7885 events. 5456/7885 cut-off events. For 80449/80449 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39700 event pairs, 611 based on Foata normal form. 2/7887 useless extension candidates. Maximal degree in co-relation 50401. Up to 6242 conditions per place. [2024-01-27 15:20:45,386 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 291 selfloop transitions, 90 changer transitions 5/387 dead transitions. [2024-01-27 15:20:45,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 387 transitions, 4793 flow [2024-01-27 15:20:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:20:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:20:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 313 transitions. [2024-01-27 15:20:45,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789661319073084 [2024-01-27 15:20:45,388 INFO L175 Difference]: Start difference. First operand has 160 places, 199 transitions, 2268 flow. Second operand 34 states and 313 transitions. [2024-01-27 15:20:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 387 transitions, 4793 flow [2024-01-27 15:20:45,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 387 transitions, 4350 flow, removed 125 selfloop flow, removed 17 redundant places. [2024-01-27 15:20:45,718 INFO L231 Difference]: Finished difference. Result has 180 places, 233 transitions, 2531 flow [2024-01-27 15:20:45,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2531, PETRI_PLACES=180, PETRI_TRANSITIONS=233} [2024-01-27 15:20:45,719 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 147 predicate places. [2024-01-27 15:20:45,719 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 233 transitions, 2531 flow [2024-01-27 15:20:45,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.956521739130435) internal successors, (274), 46 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 15:20:45,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:45,720 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:45,731 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 15:20:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:45,931 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:20:45,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1422940433, now seen corresponding path program 4 times [2024-01-27 15:20:45,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470324692] [2024-01-27 15:20:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:20:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470324692] [2024-01-27 15:20:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470324692] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854660798] [2024-01-27 15:20:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:20:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:47,214 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 15:20:47,228 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 15:20:47,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:20:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:47,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2024-01-27 15:20:47,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:47,780 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:20:47,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2024-01-27 15:20:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:20:47,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:48,818 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:20:48,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:20:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:20:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854660798] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:20:49,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:20:49,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 30 [2024-01-27 15:20:49,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858775146] [2024-01-27 15:20:49,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:20:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:20:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:20:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:20:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:20:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:20:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 233 transitions, 2531 flow. Second operand has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 15:20:49,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:20:49,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:20:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:20:52,457 INFO L124 PetriNetUnfolderBase]: 5870/8495 cut-off events. [2024-01-27 15:20:52,457 INFO L125 PetriNetUnfolderBase]: For 85029/85029 co-relation queries the response was YES. [2024-01-27 15:20:52,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52642 conditions, 8495 events. 5870/8495 cut-off events. For 85029/85029 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43465 event pairs, 607 based on Foata normal form. 30/8525 useless extension candidates. Maximal degree in co-relation 52411. Up to 6394 conditions per place. [2024-01-27 15:20:52,546 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 336 selfloop transitions, 79 changer transitions 20/436 dead transitions. [2024-01-27 15:20:52,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 436 transitions, 5142 flow [2024-01-27 15:20:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:20:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:20:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 282 transitions. [2024-01-27 15:20:52,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2024-01-27 15:20:52,548 INFO L175 Difference]: Start difference. First operand has 180 places, 233 transitions, 2531 flow. Second operand 24 states and 282 transitions. [2024-01-27 15:20:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 436 transitions, 5142 flow [2024-01-27 15:20:52,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 436 transitions, 4930 flow, removed 50 selfloop flow, removed 15 redundant places. [2024-01-27 15:20:52,912 INFO L231 Difference]: Finished difference. Result has 195 places, 257 transitions, 2825 flow [2024-01-27 15:20:52,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2825, PETRI_PLACES=195, PETRI_TRANSITIONS=257} [2024-01-27 15:20:52,913 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 162 predicate places. [2024-01-27 15:20:52,913 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 257 transitions, 2825 flow [2024-01-27 15:20:52,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 15:20:52,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:20:52,913 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:20:52,925 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 15:20:53,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:53,125 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:20:53,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:20:53,125 INFO L85 PathProgramCache]: Analyzing trace with hash -868400553, now seen corresponding path program 5 times [2024-01-27 15:20:53,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:20:53,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199266893] [2024-01-27 15:20:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:20:53,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:20:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:20:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-01-27 15:20:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:20:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199266893] [2024-01-27 15:20:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199266893] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:20:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020341034] [2024-01-27 15:20:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:20:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:20:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:20:54,581 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 15:20:54,582 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 15:20:55,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:20:55,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:20:55,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2024-01-27 15:20:55,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:20:55,477 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-01-27 15:20:55,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 38 [2024-01-27 15:20:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:20:55,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:20:57,227 INFO L349 Elim1Store]: treesize reduction 28, result has 93.2 percent of original size [2024-01-27 15:20:57,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 204 treesize of output 440 [2024-01-27 15:21:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:21:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020341034] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:01,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:01,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 11] total 39 [2024-01-27 15:21:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591058055] [2024-01-27 15:21:01,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-01-27 15:21:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-01-27 15:21:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2024-01-27 15:21:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:01,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 257 transitions, 2825 flow. Second operand has 39 states, 39 states have (on average 6.282051282051282) internal successors, (245), 39 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 15:21:01,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:01,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:05,953 INFO L124 PetriNetUnfolderBase]: 6439/9366 cut-off events. [2024-01-27 15:21:05,954 INFO L125 PetriNetUnfolderBase]: For 119380/119380 co-relation queries the response was YES. [2024-01-27 15:21:05,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62329 conditions, 9366 events. 6439/9366 cut-off events. For 119380/119380 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 49117 event pairs, 547 based on Foata normal form. 29/9373 useless extension candidates. Maximal degree in co-relation 62138. Up to 6733 conditions per place. [2024-01-27 15:21:06,024 INFO L140 encePairwiseOnDemand]: 15/33 looper letters, 366 selfloop transitions, 98 changer transitions 25/490 dead transitions. [2024-01-27 15:21:06,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 490 transitions, 5901 flow [2024-01-27 15:21:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-27 15:21:06,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-27 15:21:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 359 transitions. [2024-01-27 15:21:06,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32966023875114786 [2024-01-27 15:21:06,026 INFO L175 Difference]: Start difference. First operand has 195 places, 257 transitions, 2825 flow. Second operand 33 states and 359 transitions. [2024-01-27 15:21:06,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 490 transitions, 5901 flow [2024-01-27 15:21:06,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 490 transitions, 5653 flow, removed 79 selfloop flow, removed 17 redundant places. [2024-01-27 15:21:06,490 INFO L231 Difference]: Finished difference. Result has 217 places, 274 transitions, 3164 flow [2024-01-27 15:21:06,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3164, PETRI_PLACES=217, PETRI_TRANSITIONS=274} [2024-01-27 15:21:06,491 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 184 predicate places. [2024-01-27 15:21:06,491 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 274 transitions, 3164 flow [2024-01-27 15:21:06,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.282051282051282) internal successors, (245), 39 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 15:21:06,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:06,492 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:06,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:21:06,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:21:06,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:21:06,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1142979529, now seen corresponding path program 6 times [2024-01-27 15:21:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820235024] [2024-01-27 15:21:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820235024] [2024-01-27 15:21:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820235024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918310629] [2024-01-27 15:21:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:21:07,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:07,854 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 15:21:07,881 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 15:21:08,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:21:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:08,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:21:08,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:08,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:21:08,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-01-27 15:21:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:08,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:09,634 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:21:09,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:21:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:09,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918310629] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:09,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:09,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 28 [2024-01-27 15:21:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764859127] [2024-01-27 15:21:09,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-27 15:21:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-27 15:21:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-01-27 15:21:09,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:09,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 274 transitions, 3164 flow. Second operand has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 15:21:09,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:09,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:09,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:12,689 INFO L124 PetriNetUnfolderBase]: 6359/9236 cut-off events. [2024-01-27 15:21:12,689 INFO L125 PetriNetUnfolderBase]: For 145218/145218 co-relation queries the response was YES. [2024-01-27 15:21:12,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64439 conditions, 9236 events. 6359/9236 cut-off events. For 145218/145218 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 48193 event pairs, 647 based on Foata normal form. 2/9238 useless extension candidates. Maximal degree in co-relation 64230. Up to 7511 conditions per place. [2024-01-27 15:21:12,781 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 345 selfloop transitions, 69 changer transitions 6/421 dead transitions. [2024-01-27 15:21:12,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 421 transitions, 5426 flow [2024-01-27 15:21:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:21:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:21:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 252 transitions. [2024-01-27 15:21:12,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3054545454545455 [2024-01-27 15:21:12,786 INFO L175 Difference]: Start difference. First operand has 217 places, 274 transitions, 3164 flow. Second operand 25 states and 252 transitions. [2024-01-27 15:21:12,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 421 transitions, 5426 flow [2024-01-27 15:21:13,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 421 transitions, 5117 flow, removed 72 selfloop flow, removed 29 redundant places. [2024-01-27 15:21:13,429 INFO L231 Difference]: Finished difference. Result has 213 places, 273 transitions, 3016 flow [2024-01-27 15:21:13,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3016, PETRI_PLACES=213, PETRI_TRANSITIONS=273} [2024-01-27 15:21:13,430 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 180 predicate places. [2024-01-27 15:21:13,430 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 273 transitions, 3016 flow [2024-01-27 15:21:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.357142857142857) internal successors, (178), 28 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 15:21:13,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:13,430 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:13,443 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 15:21:13,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:21:13,643 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:21:13,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 633144219, now seen corresponding path program 7 times [2024-01-27 15:21:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:13,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955372022] [2024-01-27 15:21:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:21:16,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955372022] [2024-01-27 15:21:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955372022] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420469300] [2024-01-27 15:21:16,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:21:16,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:16,152 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 15:21:16,153 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 15:21:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:16,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:21:16,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:16,584 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-01-27 15:21:16,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 32 [2024-01-27 15:21:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:16,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:29,569 INFO L349 Elim1Store]: treesize reduction 28, result has 84.8 percent of original size [2024-01-27 15:21:29,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 187 [2024-01-27 15:21:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:30,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420469300] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:30,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:30,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11] total 45 [2024-01-27 15:21:30,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114646332] [2024-01-27 15:21:30,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:30,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-27 15:21:30,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-27 15:21:30,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1754, Unknown=3, NotChecked=0, Total=1980 [2024-01-27 15:21:30,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:30,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 273 transitions, 3016 flow. Second operand has 45 states, 45 states have (on average 5.933333333333334) internal successors, (267), 45 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:30,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:30,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:30,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:35,926 INFO L124 PetriNetUnfolderBase]: 10117/14690 cut-off events. [2024-01-27 15:21:35,927 INFO L125 PetriNetUnfolderBase]: For 284826/284826 co-relation queries the response was YES. [2024-01-27 15:21:36,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110278 conditions, 14690 events. 10117/14690 cut-off events. For 284826/284826 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 83489 event pairs, 799 based on Foata normal form. 28/14718 useless extension candidates. Maximal degree in co-relation 110083. Up to 4985 conditions per place. [2024-01-27 15:21:36,086 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 461 selfloop transitions, 149 changer transitions 42/653 dead transitions. [2024-01-27 15:21:36,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 653 transitions, 8415 flow [2024-01-27 15:21:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-27 15:21:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-27 15:21:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 431 transitions. [2024-01-27 15:21:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31096681096681095 [2024-01-27 15:21:36,095 INFO L175 Difference]: Start difference. First operand has 213 places, 273 transitions, 3016 flow. Second operand 42 states and 431 transitions. [2024-01-27 15:21:36,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 653 transitions, 8415 flow [2024-01-27 15:21:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 653 transitions, 8200 flow, removed 17 selfloop flow, removed 23 redundant places. [2024-01-27 15:21:37,216 INFO L231 Difference]: Finished difference. Result has 239 places, 323 transitions, 4388 flow [2024-01-27 15:21:37,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4388, PETRI_PLACES=239, PETRI_TRANSITIONS=323} [2024-01-27 15:21:37,217 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 206 predicate places. [2024-01-27 15:21:37,217 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 323 transitions, 4388 flow [2024-01-27 15:21:37,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.933333333333334) internal successors, (267), 45 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:21:37,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:37,217 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:37,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:21:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:21:37,429 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:21:37,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash -994809731, now seen corresponding path program 8 times [2024-01-27 15:21:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569518467] [2024-01-27 15:21:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:21:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569518467] [2024-01-27 15:21:40,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569518467] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090104317] [2024-01-27 15:21:40,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:21:40,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:40,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:40,135 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 15:21:40,138 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 15:21:40,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:21:40,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:40,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:21:40,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:40,731 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:21:40,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2024-01-27 15:21:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:40,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:41,898 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:21:41,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:21:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:42,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090104317] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:42,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 11] total 46 [2024-01-27 15:21:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379624044] [2024-01-27 15:21:42,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:42,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-01-27 15:21:42,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-01-27 15:21:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2024-01-27 15:21:42,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:42,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 323 transitions, 4388 flow. Second operand has 46 states, 46 states have (on average 5.913043478260869) internal successors, (272), 46 states have internal predecessors, (272), 0 states have call successors, (0), 0 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 15:21:42,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:42,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:42,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:48,566 INFO L124 PetriNetUnfolderBase]: 10397/15072 cut-off events. [2024-01-27 15:21:48,567 INFO L125 PetriNetUnfolderBase]: For 348373/348373 co-relation queries the response was YES. [2024-01-27 15:21:48,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120167 conditions, 15072 events. 10397/15072 cut-off events. For 348373/348373 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 85241 event pairs, 2157 based on Foata normal form. 30/15102 useless extension candidates. Maximal degree in co-relation 119875. Up to 12235 conditions per place. [2024-01-27 15:21:48,704 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 399 selfloop transitions, 129 changer transitions 20/549 dead transitions. [2024-01-27 15:21:48,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 549 transitions, 7732 flow [2024-01-27 15:21:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:21:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:21:48,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 387 transitions. [2024-01-27 15:21:48,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29318181818181815 [2024-01-27 15:21:48,707 INFO L175 Difference]: Start difference. First operand has 239 places, 323 transitions, 4388 flow. Second operand 40 states and 387 transitions. [2024-01-27 15:21:48,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 549 transitions, 7732 flow [2024-01-27 15:21:50,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 549 transitions, 6924 flow, removed 346 selfloop flow, removed 24 redundant places. [2024-01-27 15:21:50,957 INFO L231 Difference]: Finished difference. Result has 256 places, 362 transitions, 4616 flow [2024-01-27 15:21:50,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4616, PETRI_PLACES=256, PETRI_TRANSITIONS=362} [2024-01-27 15:21:50,957 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 223 predicate places. [2024-01-27 15:21:50,958 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 362 transitions, 4616 flow [2024-01-27 15:21:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.913043478260869) internal successors, (272), 46 states have internal predecessors, (272), 0 states have call successors, (0), 0 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 15:21:50,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:21:50,958 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:21:50,970 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 15:21:51,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:51,163 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:21:51,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:21:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash 330179331, now seen corresponding path program 9 times [2024-01-27 15:21:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:21:51,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247641489] [2024-01-27 15:21:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:21:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:21:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:21:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:52,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:21:52,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247641489] [2024-01-27 15:21:52,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247641489] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:21:52,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154735761] [2024-01-27 15:21:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:21:52,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:21:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:21:52,685 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 15:21:52,687 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 15:21:52,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:21:52,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:21:52,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:21:52,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:21:53,269 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-01-27 15:21:53,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2024-01-27 15:21:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:53,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:21:54,495 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:21:54,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:21:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:21:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154735761] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:21:54,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:21:54,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 31 [2024-01-27 15:21:54,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112659483] [2024-01-27 15:21:54,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:21:54,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:21:54,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:21:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:21:54,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:21:54,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:21:54,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 362 transitions, 4616 flow. Second operand has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:21:54,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:21:54,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:21:54,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:21:59,535 INFO L124 PetriNetUnfolderBase]: 10617/15386 cut-off events. [2024-01-27 15:21:59,535 INFO L125 PetriNetUnfolderBase]: For 223568/223568 co-relation queries the response was YES. [2024-01-27 15:21:59,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107579 conditions, 15386 events. 10617/15386 cut-off events. For 223568/223568 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 87322 event pairs, 2103 based on Foata normal form. 26/15412 useless extension candidates. Maximal degree in co-relation 107275. Up to 12410 conditions per place. [2024-01-27 15:21:59,671 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 458 selfloop transitions, 93 changer transitions 18/570 dead transitions. [2024-01-27 15:21:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 570 transitions, 7833 flow [2024-01-27 15:21:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:21:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:21:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 272 transitions. [2024-01-27 15:21:59,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-01-27 15:21:59,676 INFO L175 Difference]: Start difference. First operand has 256 places, 362 transitions, 4616 flow. Second operand 24 states and 272 transitions. [2024-01-27 15:21:59,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 570 transitions, 7833 flow [2024-01-27 15:22:00,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 570 transitions, 7286 flow, removed 194 selfloop flow, removed 28 redundant places. [2024-01-27 15:22:00,812 INFO L231 Difference]: Finished difference. Result has 253 places, 384 transitions, 4772 flow [2024-01-27 15:22:00,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4772, PETRI_PLACES=253, PETRI_TRANSITIONS=384} [2024-01-27 15:22:00,814 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 220 predicate places. [2024-01-27 15:22:00,816 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 384 transitions, 4772 flow [2024-01-27 15:22:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.387096774193548) internal successors, (198), 31 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 15:22:00,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:00,817 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:00,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:01,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-27 15:22:01,029 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:01,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:01,030 INFO L85 PathProgramCache]: Analyzing trace with hash -81388637, now seen corresponding path program 10 times [2024-01-27 15:22:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:01,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580979221] [2024-01-27 15:22:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:22:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580979221] [2024-01-27 15:22:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580979221] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428587402] [2024-01-27 15:22:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:22:03,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:03,301 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:03,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:22:03,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:22:03,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:03,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:22:03,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:03,833 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-01-27 15:22:03,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 38 [2024-01-27 15:22:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:22:03,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:05,058 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:22:05,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:22:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:22:05,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428587402] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:05,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:05,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 11] total 43 [2024-01-27 15:22:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588389651] [2024-01-27 15:22:05,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:05,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-01-27 15:22:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-01-27 15:22:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2024-01-27 15:22:05,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:05,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 384 transitions, 4772 flow. Second operand has 43 states, 43 states have (on average 6.116279069767442) internal successors, (263), 43 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 15:22:05,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:05,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:12,504 INFO L124 PetriNetUnfolderBase]: 11106/16194 cut-off events. [2024-01-27 15:22:12,504 INFO L125 PetriNetUnfolderBase]: For 232007/232007 co-relation queries the response was YES. [2024-01-27 15:22:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113015 conditions, 16194 events. 11106/16194 cut-off events. For 232007/232007 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 93586 event pairs, 2115 based on Foata normal form. 55/16249 useless extension candidates. Maximal degree in co-relation 112746. Up to 12371 conditions per place. [2024-01-27 15:22:12,668 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 457 selfloop transitions, 145 changer transitions 31/634 dead transitions. [2024-01-27 15:22:12,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 634 transitions, 8323 flow [2024-01-27 15:22:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:22:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:22:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 389 transitions. [2024-01-27 15:22:12,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367965367965368 [2024-01-27 15:22:12,670 INFO L175 Difference]: Start difference. First operand has 253 places, 384 transitions, 4772 flow. Second operand 35 states and 389 transitions. [2024-01-27 15:22:12,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 634 transitions, 8323 flow [2024-01-27 15:22:14,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 634 transitions, 7944 flow, removed 133 selfloop flow, removed 16 redundant places. [2024-01-27 15:22:14,060 INFO L231 Difference]: Finished difference. Result has 276 places, 404 transitions, 5145 flow [2024-01-27 15:22:14,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5145, PETRI_PLACES=276, PETRI_TRANSITIONS=404} [2024-01-27 15:22:14,061 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 243 predicate places. [2024-01-27 15:22:14,061 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 404 transitions, 5145 flow [2024-01-27 15:22:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.116279069767442) internal successors, (263), 43 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 15:22:14,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:14,062 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:14,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:14,272 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:14,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash -482980393, now seen corresponding path program 11 times [2024-01-27 15:22:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:14,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628097103] [2024-01-27 15:22:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:22:15,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628097103] [2024-01-27 15:22:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628097103] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412927826] [2024-01-27 15:22:15,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:22:15,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:15,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:15,438 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:15,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:22:16,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:22:16,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:16,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:22:16,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:16,693 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-01-27 15:22:16,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2024-01-27 15:22:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:22:16,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:17,780 INFO L349 Elim1Store]: treesize reduction 28, result has 88.8 percent of original size [2024-01-27 15:22:17,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 114 treesize of output 254 [2024-01-27 15:22:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:22:18,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412927826] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:18,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:18,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 30 [2024-01-27 15:22:18,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424713374] [2024-01-27 15:22:18,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:18,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:22:18,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:22:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:22:18,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:18,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 404 transitions, 5145 flow. Second operand has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 15:22:18,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:18,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:18,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:22,657 INFO L124 PetriNetUnfolderBase]: 11120/16215 cut-off events. [2024-01-27 15:22:22,657 INFO L125 PetriNetUnfolderBase]: For 258699/258699 co-relation queries the response was YES. [2024-01-27 15:22:22,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116052 conditions, 16215 events. 11120/16215 cut-off events. For 258699/258699 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 93704 event pairs, 2175 based on Foata normal form. 52/16267 useless extension candidates. Maximal degree in co-relation 115743. Up to 13072 conditions per place. [2024-01-27 15:22:22,843 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 467 selfloop transitions, 98 changer transitions 20/586 dead transitions. [2024-01-27 15:22:22,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 586 transitions, 7984 flow [2024-01-27 15:22:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:22:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:22:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 292 transitions. [2024-01-27 15:22:22,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277216610549944 [2024-01-27 15:22:22,845 INFO L175 Difference]: Start difference. First operand has 276 places, 404 transitions, 5145 flow. Second operand 27 states and 292 transitions. [2024-01-27 15:22:22,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 586 transitions, 7984 flow [2024-01-27 15:22:24,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 586 transitions, 7535 flow, removed 137 selfloop flow, removed 26 redundant places. [2024-01-27 15:22:24,370 INFO L231 Difference]: Finished difference. Result has 276 places, 404 transitions, 5029 flow [2024-01-27 15:22:24,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4684, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5029, PETRI_PLACES=276, PETRI_TRANSITIONS=404} [2024-01-27 15:22:24,371 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 243 predicate places. [2024-01-27 15:22:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 404 transitions, 5029 flow [2024-01-27 15:22:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.433333333333334) internal successors, (193), 30 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 15:22:24,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:24,372 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:24,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:22:24,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:24,585 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:24,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1520941753, now seen corresponding path program 12 times [2024-01-27 15:22:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:24,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135719964] [2024-01-27 15:22:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:24,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:22:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135719964] [2024-01-27 15:22:27,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135719964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363369081] [2024-01-27 15:22:27,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:22:27,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:27,202 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:27,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:22:27,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:22:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:22:27,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:22:27,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:28,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:22:28,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 80 [2024-01-27 15:22:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:22:28,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:29,390 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:22:29,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:22:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:22:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363369081] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:30,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:30,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14, 11] total 51 [2024-01-27 15:22:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544826295] [2024-01-27 15:22:30,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:30,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-01-27 15:22:30,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-01-27 15:22:30,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2024-01-27 15:22:30,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:30,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 404 transitions, 5029 flow. Second operand has 51 states, 51 states have (on average 5.96078431372549) internal successors, (304), 51 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:30,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:30,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:30,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:22:44,932 INFO L124 PetriNetUnfolderBase]: 14023/20636 cut-off events. [2024-01-27 15:22:44,932 INFO L125 PetriNetUnfolderBase]: For 316163/316163 co-relation queries the response was YES. [2024-01-27 15:22:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148087 conditions, 20636 events. 14023/20636 cut-off events. For 316163/316163 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 127055 event pairs, 720 based on Foata normal form. 10/20646 useless extension candidates. Maximal degree in co-relation 147819. Up to 6573 conditions per place. [2024-01-27 15:22:45,147 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 578 selfloop transitions, 378 changer transitions 58/1015 dead transitions. [2024-01-27 15:22:45,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1015 transitions, 13171 flow [2024-01-27 15:22:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-01-27 15:22:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-01-27 15:22:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 798 transitions. [2024-01-27 15:22:45,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-01-27 15:22:45,151 INFO L175 Difference]: Start difference. First operand has 276 places, 404 transitions, 5029 flow. Second operand 76 states and 798 transitions. [2024-01-27 15:22:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1015 transitions, 13171 flow [2024-01-27 15:22:46,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1015 transitions, 12868 flow, removed 70 selfloop flow, removed 23 redundant places. [2024-01-27 15:22:46,928 INFO L231 Difference]: Finished difference. Result has 357 places, 567 transitions, 8632 flow [2024-01-27 15:22:46,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=8632, PETRI_PLACES=357, PETRI_TRANSITIONS=567} [2024-01-27 15:22:46,929 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 324 predicate places. [2024-01-27 15:22:46,929 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 567 transitions, 8632 flow [2024-01-27 15:22:46,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.96078431372549) internal successors, (304), 51 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:46,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:22:46,930 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:22:46,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-27 15:22:47,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:47,142 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:22:47,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:22:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash -921656891, now seen corresponding path program 13 times [2024-01-27 15:22:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:22:47,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608673024] [2024-01-27 15:22:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:22:47,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:22:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:22:48,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:22:48,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608673024] [2024-01-27 15:22:48,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608673024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:22:48,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409016378] [2024-01-27 15:22:48,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:22:48,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:22:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:22:48,633 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:22:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:22:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:22:48,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:22:48,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:22:49,282 INFO L349 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2024-01-27 15:22:49,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 32 [2024-01-27 15:22:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:22:49,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:22:54,438 INFO L349 Elim1Store]: treesize reduction 28, result has 84.8 percent of original size [2024-01-27 15:22:54,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 187 [2024-01-27 15:22:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-01-27 15:22:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409016378] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:22:55,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:22:55,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 33 [2024-01-27 15:22:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797328602] [2024-01-27 15:22:55,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:22:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:22:55,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:22:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:22:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=949, Unknown=1, NotChecked=0, Total=1056 [2024-01-27 15:22:55,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:22:55,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 567 transitions, 8632 flow. Second operand has 33 states, 33 states have (on average 6.454545454545454) internal successors, (213), 33 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:22:55,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:22:55,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:22:55,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:23:07,127 INFO L124 PetriNetUnfolderBase]: 21856/32310 cut-off events. [2024-01-27 15:23:07,127 INFO L125 PetriNetUnfolderBase]: For 818475/818475 co-relation queries the response was YES. [2024-01-27 15:23:07,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291383 conditions, 32310 events. 21856/32310 cut-off events. For 818475/818475 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 215697 event pairs, 852 based on Foata normal form. 28/32338 useless extension candidates. Maximal degree in co-relation 291058. Up to 7574 conditions per place. [2024-01-27 15:23:08,135 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 710 selfloop transitions, 476 changer transitions 32/1219 dead transitions. [2024-01-27 15:23:08,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1219 transitions, 20636 flow [2024-01-27 15:23:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:23:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:23:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 443 transitions. [2024-01-27 15:23:08,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38354978354978353 [2024-01-27 15:23:08,137 INFO L175 Difference]: Start difference. First operand has 357 places, 567 transitions, 8632 flow. Second operand 35 states and 443 transitions. [2024-01-27 15:23:08,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1219 transitions, 20636 flow [2024-01-27 15:23:15,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1219 transitions, 18564 flow, removed 948 selfloop flow, removed 26 redundant places. [2024-01-27 15:23:15,596 INFO L231 Difference]: Finished difference. Result has 373 places, 800 transitions, 12252 flow [2024-01-27 15:23:15,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12252, PETRI_PLACES=373, PETRI_TRANSITIONS=800} [2024-01-27 15:23:15,609 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 340 predicate places. [2024-01-27 15:23:15,609 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 800 transitions, 12252 flow [2024-01-27 15:23:15,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.454545454545454) internal successors, (213), 33 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:23:15,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:23:15,610 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:23:15,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-27 15:23:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:15,815 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:23:15,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:23:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1263623537, now seen corresponding path program 14 times [2024-01-27 15:23:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:23:15,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612381564] [2024-01-27 15:23:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:23:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:23:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:23:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:23:16,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:23:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612381564] [2024-01-27 15:23:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612381564] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:23:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211676916] [2024-01-27 15:23:16,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:23:16,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:23:16,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:23:16,889 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:23:16,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:23:17,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:23:17,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:23:17,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2024-01-27 15:23:17,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:23:17,730 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-27 15:23:17,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2024-01-27 15:23:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-01-27 15:23:17,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:23:18,799 INFO L349 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2024-01-27 15:23:18,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 184 [2024-01-27 15:23:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-01-27 15:23:19,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211676916] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:23:19,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:23:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 34 [2024-01-27 15:23:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118949503] [2024-01-27 15:23:19,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:23:19,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:23:19,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:23:19,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:23:19,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:23:19,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-27 15:23:19,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 800 transitions, 12252 flow. Second operand has 34 states, 34 states have (on average 6.470588235294118) internal successors, (220), 34 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 15:23:19,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:23:19,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-27 15:23:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand