./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.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/array-eq-trans.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 e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:14:01,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:14:01,925 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:14:01,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:14:01,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:14:01,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:14:01,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:14:01,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:14:01,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:14:01,967 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:14:01,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:14:01,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:14:01,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:14:01,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:14:01,971 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:14:01,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:14:01,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:14:01,972 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:14:01,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:14:01,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:14:01,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:14:01,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:14:01,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:14:01,973 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:14:01,973 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:14:01,974 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:14:01,974 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:14:01,974 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:14:01,975 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:14:01,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:14:01,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:14:01,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:14:01,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:01,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:14:01,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:14:01,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:14:01,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:14:01,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:14:01,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:14:01,978 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:14:01,978 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:14:01,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:14:01,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:14:01,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-01-27 15:14:02,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:14:02,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:14:02,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:14:02,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:14:02,252 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:14:02,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-01-27 15:14:03,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:14:03,766 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:14:03,767 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-01-27 15:14:03,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d98b16c/66c556ec461e4347bc951858882611c6/FLAG2270fcc3f [2024-01-27 15:14:03,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7d98b16c/66c556ec461e4347bc951858882611c6 [2024-01-27 15:14:03,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:14:03,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:14:03,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:03,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:14:03,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:14:03,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:03" (1/1) ... [2024-01-27 15:14:03,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf22790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:03, skipping insertion in model container [2024-01-27 15:14:03,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:14:03" (1/1) ... [2024-01-27 15:14:03,821 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:14:03,978 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/array-eq-trans.wvr.c[2776,2789] [2024-01-27 15:14:03,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:04,001 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:14:04,022 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/array-eq-trans.wvr.c[2776,2789] [2024-01-27 15:14:04,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:14:04,040 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:14:04,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04 WrapperNode [2024-01-27 15:14:04,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:14:04,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:04,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:14:04,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:14:04,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,056 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,084 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 212 [2024-01-27 15:14:04,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:14:04,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:14:04,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:14:04,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:14:04,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,101 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,121 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 15, 2, 2, 2]. 65 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, 3, 1, 1, 1]. [2024-01-27 15:14:04,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,141 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:14:04,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:14:04,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:14:04,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:14:04,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (1/1) ... [2024-01-27 15:14:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:14:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:04,222 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 15:14:04,244 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 15:14:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:14:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:14:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:14:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:14:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:14:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:14:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:14:04,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:14:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:14:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:14:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:14:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:14:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:14:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:14:04,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:14:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:14:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:14:04,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:14:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:14:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:14:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:14:04,295 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 15:14:04,414 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:14:04,416 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:14:04,882 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:14:04,884 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:14:05,306 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:14:05,307 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-27 15:14:05,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:05 BoogieIcfgContainer [2024-01-27 15:14:05,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:14:05,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:14:05,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:14:05,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:14:05,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:14:03" (1/3) ... [2024-01-27 15:14:05,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4598ea17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:05, skipping insertion in model container [2024-01-27 15:14:05,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:14:04" (2/3) ... [2024-01-27 15:14:05,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4598ea17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:14:05, skipping insertion in model container [2024-01-27 15:14:05,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:14:05" (3/3) ... [2024-01-27 15:14:05,318 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-01-27 15:14:05,330 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:14:05,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:14:05,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:14:05,341 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:14:05,409 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:14:05,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2024-01-27 15:14:05,500 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-01-27 15:14:05,500 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:14:05,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 15:14:05,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2024-01-27 15:14:05,510 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2024-01-27 15:14:05,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:14:05,531 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;@c4f5e2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:14:05,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:14:05,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:14:05,547 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-01-27 15:14:05,547 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:14:05,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:05,548 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 15:14:05,549 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 15:14:05,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1204000408, now seen corresponding path program 1 times [2024-01-27 15:14:05,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:05,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731257702] [2024-01-27 15:14:05,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:05,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:06,542 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 15:14:06,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731257702] [2024-01-27 15:14:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731257702] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:06,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:06,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:14:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58636022] [2024-01-27 15:14:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:14:06,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:14:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:14:06,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:06,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 15:14:06,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:06,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:06,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:07,029 INFO L124 PetriNetUnfolderBase]: 1803/2446 cut-off events. [2024-01-27 15:14:07,030 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-01-27 15:14:07,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 2446 events. 1803/2446 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10118 event pairs, 991 based on Foata normal form. 1/1629 useless extension candidates. Maximal degree in co-relation 2641. Up to 1506 conditions per place. [2024-01-27 15:14:07,048 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 33 selfloop transitions, 2 changer transitions 28/67 dead transitions. [2024-01-27 15:14:07,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 296 flow [2024-01-27 15:14:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:14:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:14:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-01-27 15:14:07,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-01-27 15:14:07,068 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 4 states and 93 transitions. [2024-01-27 15:14:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 296 flow [2024-01-27 15:14:07,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 67 transitions, 272 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:14:07,081 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 98 flow [2024-01-27 15:14:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-01-27 15:14:07,088 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2024-01-27 15:14:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 98 flow [2024-01-27 15:14:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 15:14:07,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:07,089 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 15:14:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:14:07,090 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 15:14:07,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1838637474, now seen corresponding path program 1 times [2024-01-27 15:14:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780104169] [2024-01-27 15:14:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780104169] [2024-01-27 15:14:07,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780104169] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:07,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689076999] [2024-01-27 15:14:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:07,500 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 15:14:07,502 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 15:14:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:07,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:07,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:07,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:08,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:08,033 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 59 treesize of output 55 [2024-01-27 15:14:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:14:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689076999] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:08,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:08,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2024-01-27 15:14:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355101665] [2024-01-27 15:14:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:08,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:14:08,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:14:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:14:08,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:08,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:08,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:08,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:08,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:08,556 INFO L124 PetriNetUnfolderBase]: 2118/2869 cut-off events. [2024-01-27 15:14:08,557 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-01-27 15:14:08,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6028 conditions, 2869 events. 2118/2869 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12529 event pairs, 498 based on Foata normal form. 1/2142 useless extension candidates. Maximal degree in co-relation 6016. Up to 1163 conditions per place. [2024-01-27 15:14:08,572 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 54 selfloop transitions, 4 changer transitions 22/84 dead transitions. [2024-01-27 15:14:08,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 84 transitions, 364 flow [2024-01-27 15:14:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-01-27 15:14:08,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-01-27 15:14:08,575 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 98 flow. Second operand 5 states and 116 transitions. [2024-01-27 15:14:08,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 84 transitions, 364 flow [2024-01-27 15:14:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 84 transitions, 350 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:08,580 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 112 flow [2024-01-27 15:14:08,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-01-27 15:14:08,581 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2024-01-27 15:14:08,581 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 112 flow [2024-01-27 15:14:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:08,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:08,582 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, 1] [2024-01-27 15:14:08,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:14:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:08,797 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 15:14:08,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1639904778, now seen corresponding path program 1 times [2024-01-27 15:14:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872243397] [2024-01-27 15:14:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:08,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872243397] [2024-01-27 15:14:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872243397] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:08,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:08,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:14:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238382938] [2024-01-27 15:14:08,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:14:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:14:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:14:08,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:08,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 15:14:08,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:08,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:08,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:09,271 INFO L124 PetriNetUnfolderBase]: 2431/3312 cut-off events. [2024-01-27 15:14:09,272 INFO L125 PetriNetUnfolderBase]: For 325/325 co-relation queries the response was YES. [2024-01-27 15:14:09,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7168 conditions, 3312 events. 2431/3312 cut-off events. For 325/325 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14488 event pairs, 562 based on Foata normal form. 58/2467 useless extension candidates. Maximal degree in co-relation 7150. Up to 2009 conditions per place. [2024-01-27 15:14:09,292 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 57 selfloop transitions, 4 changer transitions 19/84 dead transitions. [2024-01-27 15:14:09,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 84 transitions, 374 flow [2024-01-27 15:14:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-01-27 15:14:09,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-01-27 15:14:09,295 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 112 flow. Second operand 5 states and 115 transitions. [2024-01-27 15:14:09,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 84 transitions, 374 flow [2024-01-27 15:14:09,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 84 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:09,298 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 134 flow [2024-01-27 15:14:09,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-01-27 15:14:09,298 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2024-01-27 15:14:09,299 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 134 flow [2024-01-27 15:14:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 15:14:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:09,299 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, 1, 1] [2024-01-27 15:14:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:14:09,300 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 15:14:09,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1851873304, now seen corresponding path program 1 times [2024-01-27 15:14:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904461057] [2024-01-27 15:14:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:09,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:09,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904461057] [2024-01-27 15:14:09,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904461057] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:09,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892131930] [2024-01-27 15:14:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:09,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:09,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:09,705 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 15:14:09,721 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 15:14:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:09,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:14:09,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:10,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:10,050 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:10,051 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 59 treesize of output 55 [2024-01-27 15:14:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892131930] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:10,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:10,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 13 [2024-01-27 15:14:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701187815] [2024-01-27 15:14:10,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:10,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:10,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:10,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:14:10,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:10,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 15:14:10,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:10,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:10,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:10,851 INFO L124 PetriNetUnfolderBase]: 4916/6895 cut-off events. [2024-01-27 15:14:10,851 INFO L125 PetriNetUnfolderBase]: For 1991/1991 co-relation queries the response was YES. [2024-01-27 15:14:10,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15493 conditions, 6895 events. 4916/6895 cut-off events. For 1991/1991 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35949 event pairs, 1113 based on Foata normal form. 3/5316 useless extension candidates. Maximal degree in co-relation 15469. Up to 2082 conditions per place. [2024-01-27 15:14:10,885 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 79 selfloop transitions, 6 changer transitions 22/111 dead transitions. [2024-01-27 15:14:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 111 transitions, 558 flow [2024-01-27 15:14:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-01-27 15:14:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-01-27 15:14:10,890 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 134 flow. Second operand 7 states and 148 transitions. [2024-01-27 15:14:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 111 transitions, 558 flow [2024-01-27 15:14:10,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 111 transitions, 543 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:10,895 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 156 flow [2024-01-27 15:14:10,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-01-27 15:14:10,897 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2024-01-27 15:14:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 156 flow [2024-01-27 15:14:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 15:14:10,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:10,898 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, 1, 1, 1] [2024-01-27 15:14:10,922 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 15:14:11,121 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 15:14:11,122 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 15:14:11,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2062973355, now seen corresponding path program 1 times [2024-01-27 15:14:11,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563221181] [2024-01-27 15:14:11,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:11,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563221181] [2024-01-27 15:14:11,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563221181] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:11,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:11,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:14:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23335639] [2024-01-27 15:14:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:11,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:14:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:11,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:14:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:14:11,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:11,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 15:14:11,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:11,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:11,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:11,805 INFO L124 PetriNetUnfolderBase]: 4323/6144 cut-off events. [2024-01-27 15:14:11,805 INFO L125 PetriNetUnfolderBase]: For 2278/2278 co-relation queries the response was YES. [2024-01-27 15:14:11,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14625 conditions, 6144 events. 4323/6144 cut-off events. For 2278/2278 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31418 event pairs, 1295 based on Foata normal form. 138/5397 useless extension candidates. Maximal degree in co-relation 14597. Up to 3609 conditions per place. [2024-01-27 15:14:11,848 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 60 selfloop transitions, 4 changer transitions 21/89 dead transitions. [2024-01-27 15:14:11,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 89 transitions, 460 flow [2024-01-27 15:14:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:14:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:14:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-01-27 15:14:11,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-01-27 15:14:11,851 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 156 flow. Second operand 5 states and 113 transitions. [2024-01-27 15:14:11,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 89 transitions, 460 flow [2024-01-27 15:14:11,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 452 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:11,855 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 168 flow [2024-01-27 15:14:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-01-27 15:14:11,856 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2024-01-27 15:14:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 168 flow [2024-01-27 15:14:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 15:14:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:11,856 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, 1, 1, 1, 1] [2024-01-27 15:14:11,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:14:11,857 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 15:14:11,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -100603553, now seen corresponding path program 1 times [2024-01-27 15:14:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:11,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120555661] [2024-01-27 15:14:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:11,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:12,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120555661] [2024-01-27 15:14:12,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120555661] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:12,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092122511] [2024-01-27 15:14:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:12,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:12,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:12,037 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 15:14:12,065 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 15:14:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:12,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:14:12,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:12,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092122511] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:14:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-01-27 15:14:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81226066] [2024-01-27 15:14:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:14:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:14:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:14:12,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:12,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 15:14:12,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:12,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:12,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:13,259 INFO L124 PetriNetUnfolderBase]: 6804/9915 cut-off events. [2024-01-27 15:14:13,260 INFO L125 PetriNetUnfolderBase]: For 6391/6391 co-relation queries the response was YES. [2024-01-27 15:14:13,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24439 conditions, 9915 events. 6804/9915 cut-off events. For 6391/6391 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 55024 event pairs, 2469 based on Foata normal form. 0/9058 useless extension candidates. Maximal degree in co-relation 24410. Up to 4048 conditions per place. [2024-01-27 15:14:13,309 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 81 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-01-27 15:14:13,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 92 transitions, 514 flow [2024-01-27 15:14:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:13,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-01-27 15:14:13,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-01-27 15:14:13,311 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 168 flow. Second operand 7 states and 125 transitions. [2024-01-27 15:14:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 92 transitions, 514 flow [2024-01-27 15:14:13,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 92 transitions, 502 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:14:13,316 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 190 flow [2024-01-27 15:14:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2024-01-27 15:14:13,317 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-01-27 15:14:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 190 flow [2024-01-27 15:14:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 15:14:13,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:13,317 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, 1, 1, 1, 1, 1] [2024-01-27 15:14:13,336 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 15:14:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:13,533 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 15:14:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1102701806, now seen corresponding path program 1 times [2024-01-27 15:14:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:13,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986580960] [2024-01-27 15:14:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:13,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:15,093 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 15:14:15,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:15,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986580960] [2024-01-27 15:14:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986580960] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:14:15,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:14:15,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 15:14:15,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588666852] [2024-01-27 15:14:15,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:14:15,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-27 15:14:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-27 15:14:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:14:15,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:15,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 190 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:15,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:15,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:15,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:16,061 INFO L124 PetriNetUnfolderBase]: 7133/10370 cut-off events. [2024-01-27 15:14:16,061 INFO L125 PetriNetUnfolderBase]: For 6836/6836 co-relation queries the response was YES. [2024-01-27 15:14:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27070 conditions, 10370 events. 7133/10370 cut-off events. For 6836/6836 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57934 event pairs, 2247 based on Foata normal form. 2/10370 useless extension candidates. Maximal degree in co-relation 27038. Up to 9421 conditions per place. [2024-01-27 15:14:16,118 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 82 selfloop transitions, 13 changer transitions 2/101 dead transitions. [2024-01-27 15:14:16,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 101 transitions, 554 flow [2024-01-27 15:14:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:14:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:14:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-01-27 15:14:16,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-27 15:14:16,119 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 190 flow. Second operand 6 states and 132 transitions. [2024-01-27 15:14:16,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 101 transitions, 554 flow [2024-01-27 15:14:16,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 548 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:16,126 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 306 flow [2024-01-27 15:14:16,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-01-27 15:14:16,128 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2024-01-27 15:14:16,128 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 306 flow [2024-01-27 15:14:16,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:14:16,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:16,128 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, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:16,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:14:16,129 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 15:14:16,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash 158671072, now seen corresponding path program 1 times [2024-01-27 15:14:16,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:16,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990019646] [2024-01-27 15:14:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:16,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990019646] [2024-01-27 15:14:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990019646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881863443] [2024-01-27 15:14:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:16,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:16,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:16,381 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 15:14:16,407 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 15:14:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:16,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-27 15:14:16,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:16,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:14:16,690 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 43 treesize of output 39 [2024-01-27 15:14:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:14:16,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881863443] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:16,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:16,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-01-27 15:14:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21281105] [2024-01-27 15:14:16,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:14:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:14:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:14:16,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:16,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 306 flow. Second operand has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 15:14:16,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:16,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:16,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:18,625 INFO L124 PetriNetUnfolderBase]: 12073/17711 cut-off events. [2024-01-27 15:14:18,625 INFO L125 PetriNetUnfolderBase]: For 21104/21107 co-relation queries the response was YES. [2024-01-27 15:14:18,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50055 conditions, 17711 events. 12073/17711 cut-off events. For 21104/21107 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 107817 event pairs, 8292 based on Foata normal form. 287/17983 useless extension candidates. Maximal degree in co-relation 46085. Up to 10340 conditions per place. [2024-01-27 15:14:18,741 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 94 selfloop transitions, 5 changer transitions 26/129 dead transitions. [2024-01-27 15:14:18,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 129 transitions, 911 flow [2024-01-27 15:14:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:14:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:14:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-01-27 15:14:18,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-01-27 15:14:18,743 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 306 flow. Second operand 7 states and 136 transitions. [2024-01-27 15:14:18,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 129 transitions, 911 flow [2024-01-27 15:14:18,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 129 transitions, 896 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-27 15:14:18,767 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 350 flow [2024-01-27 15:14:18,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=350, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-01-27 15:14:18,770 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2024-01-27 15:14:18,770 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 350 flow [2024-01-27 15:14:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 0 states have call successors, (0), 0 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 15:14:18,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:18,770 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, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:18,789 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 15:14:18,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:18,987 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 15:14:18,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:18,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1385607100, now seen corresponding path program 1 times [2024-01-27 15:14:18,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:18,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444502105] [2024-01-27 15:14:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:18,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:14:20,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444502105] [2024-01-27 15:14:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444502105] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736716906] [2024-01-27 15:14:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:20,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:20,740 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 15:14:20,760 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 15:14:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:20,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:14:20,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:21,275 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 15:14:21,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:22,309 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-01-27 15:14:22,310 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 60 treesize of output 236 [2024-01-27 15:14:29,554 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 15:14:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736716906] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:14:29,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:14:29,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-01-27 15:14:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2239126] [2024-01-27 15:14:29,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:14:29,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:14:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:14:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:14:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:14:29,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:14:29,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 350 flow. Second operand has 22 states, 22 states have (on average 10.954545454545455) internal successors, (241), 22 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 15:14:29,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:14:29,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:14:29,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:14:34,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:14:38,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:14:42,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:14:46,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-01-27 15:14:50,655 WARN L539 Checker$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 15:14:52,253 INFO L124 PetriNetUnfolderBase]: 13863/20390 cut-off events. [2024-01-27 15:14:52,253 INFO L125 PetriNetUnfolderBase]: For 21460/21474 co-relation queries the response was YES. [2024-01-27 15:14:52,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57804 conditions, 20390 events. 13863/20390 cut-off events. For 21460/21474 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 128530 event pairs, 3254 based on Foata normal form. 22/20410 useless extension candidates. Maximal degree in co-relation 48999. Up to 11693 conditions per place. [2024-01-27 15:14:52,379 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 168 selfloop transitions, 47 changer transitions 4/223 dead transitions. [2024-01-27 15:14:52,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 223 transitions, 1408 flow [2024-01-27 15:14:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-27 15:14:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-27 15:14:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 315 transitions. [2024-01-27 15:14:52,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-01-27 15:14:52,382 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 350 flow. Second operand 16 states and 315 transitions. [2024-01-27 15:14:52,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 223 transitions, 1408 flow [2024-01-27 15:14:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 223 transitions, 1388 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-01-27 15:14:52,458 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 754 flow [2024-01-27 15:14:52,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=754, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-01-27 15:14:52,459 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-01-27 15:14:52,459 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 754 flow [2024-01-27 15:14:52,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.954545454545455) internal successors, (241), 22 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 15:14:52,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:14:52,459 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, 1, 1, 1, 1, 1, 1] [2024-01-27 15:14:52,477 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 15:14:52,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:52,675 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 15:14:52,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:14:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 492258170, now seen corresponding path program 2 times [2024-01-27 15:14:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:14:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617393106] [2024-01-27 15:14:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:14:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:14:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:14:53,759 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 15:14:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:14:53,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617393106] [2024-01-27 15:14:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617393106] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:14:53,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234717567] [2024-01-27 15:14:53,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:14:53,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:14:53,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:14:53,764 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 15:14:53,765 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 15:14:53,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:14:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:14:53,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:14:53,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:14:54,758 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 15:14:54,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:14:55,716 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-01-27 15:14:55,716 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 79 treesize of output 235 [2024-01-27 15:15:03,639 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 15:15:03,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234717567] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:03,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:03,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2024-01-27 15:15:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450821491] [2024-01-27 15:15:03,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:03,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:15:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:15:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:15:03,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:15:03,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 754 flow. Second operand has 21 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:03,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:03,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:15:03,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:07,493 INFO L124 PetriNetUnfolderBase]: 22141/32694 cut-off events. [2024-01-27 15:15:07,494 INFO L125 PetriNetUnfolderBase]: For 67778/67778 co-relation queries the response was YES. [2024-01-27 15:15:07,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106389 conditions, 32694 events. 22141/32694 cut-off events. For 67778/67778 co-relation queries the response was YES. Maximal size of possible extension queue 1508. Compared 224970 event pairs, 4916 based on Foata normal form. 30/32724 useless extension candidates. Maximal degree in co-relation 102392. Up to 12669 conditions per place. [2024-01-27 15:15:07,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 96 changer transitions 17/362 dead transitions. [2024-01-27 15:15:07,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 362 transitions, 2738 flow [2024-01-27 15:15:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:15:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:15:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 484 transitions. [2024-01-27 15:15:07,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-01-27 15:15:07,868 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 754 flow. Second operand 24 states and 484 transitions. [2024-01-27 15:15:07,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 362 transitions, 2738 flow [2024-01-27 15:15:08,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 362 transitions, 2647 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-01-27 15:15:08,301 INFO L231 Difference]: Finished difference. Result has 125 places, 148 transitions, 1549 flow [2024-01-27 15:15:08,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1549, PETRI_PLACES=125, PETRI_TRANSITIONS=148} [2024-01-27 15:15:08,301 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 86 predicate places. [2024-01-27 15:15:08,302 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 148 transitions, 1549 flow [2024-01-27 15:15:08,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:15:08,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:08,302 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, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:08,314 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 15:15:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:08,503 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 15:15:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1779597508, now seen corresponding path program 1 times [2024-01-27 15:15:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251307696] [2024-01-27 15:15:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:15:09,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:09,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251307696] [2024-01-27 15:15:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251307696] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657210305] [2024-01-27 15:15:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:09,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:09,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:09,806 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 15:15:09,808 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 15:15:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:10,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-27 15:15:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:10,268 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 15:15:10,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:10,928 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-01-27 15:15:10,928 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 60 treesize of output 236 [2024-01-27 15:15:16,835 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 15:15:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657210305] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:16,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:16,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-01-27 15:15:16,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153468606] [2024-01-27 15:15:16,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:16,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:15:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:16,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:15:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:15:16,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:15:16,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 148 transitions, 1549 flow. Second operand has 22 states, 22 states have (on average 10.954545454545455) internal successors, (241), 22 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 15:15:16,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:16,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:15:16,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:21,057 INFO L124 PetriNetUnfolderBase]: 24837/36746 cut-off events. [2024-01-27 15:15:21,057 INFO L125 PetriNetUnfolderBase]: For 141572/141578 co-relation queries the response was YES. [2024-01-27 15:15:21,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137917 conditions, 36746 events. 24837/36746 cut-off events. For 141572/141578 co-relation queries the response was YES. Maximal size of possible extension queue 1738. Compared 255789 event pairs, 6682 based on Foata normal form. 20/36764 useless extension candidates. Maximal degree in co-relation 133408. Up to 26563 conditions per place. [2024-01-27 15:15:21,389 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 172 selfloop transitions, 62 changer transitions 3/241 dead transitions. [2024-01-27 15:15:21,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 241 transitions, 2564 flow [2024-01-27 15:15:21,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:15:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:15:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-01-27 15:15:21,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-01-27 15:15:21,391 INFO L175 Difference]: Start difference. First operand has 125 places, 148 transitions, 1549 flow. Second operand 12 states and 217 transitions. [2024-01-27 15:15:21,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 241 transitions, 2564 flow [2024-01-27 15:15:22,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 241 transitions, 2354 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-01-27 15:15:22,516 INFO L231 Difference]: Finished difference. Result has 131 places, 161 transitions, 1695 flow [2024-01-27 15:15:22,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1695, PETRI_PLACES=131, PETRI_TRANSITIONS=161} [2024-01-27 15:15:22,517 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 92 predicate places. [2024-01-27 15:15:22,517 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 161 transitions, 1695 flow [2024-01-27 15:15:22,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.954545454545455) internal successors, (241), 22 states have internal predecessors, (241), 0 states have call successors, (0), 0 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 15:15:22,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:22,518 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, 1, 1, 1, 1, 1, 1] [2024-01-27 15:15:22,532 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 15:15:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:22,720 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 15:15:22,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1855955960, now seen corresponding path program 2 times [2024-01-27 15:15:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717524093] [2024-01-27 15:15:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:22,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:15:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717524093] [2024-01-27 15:15:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717524093] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500132545] [2024-01-27 15:15:24,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:15:24,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:24,023 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 15:15:24,024 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 15:15:24,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:15:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:24,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:15:24,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:24,691 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 15:15:24,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:25,463 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-01-27 15:15:25,464 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 60 treesize of output 236 [2024-01-27 15:15:30,477 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 15:15:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500132545] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:30,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:30,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-01-27 15:15:30,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585383771] [2024-01-27 15:15:30,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:30,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:15:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:15:30,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:15:30,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:15:30,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 161 transitions, 1695 flow. Second operand has 21 states, 21 states have (on average 10.238095238095237) internal successors, (215), 21 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 15:15:30,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:30,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:15:30,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:35,971 INFO L124 PetriNetUnfolderBase]: 29607/43758 cut-off events. [2024-01-27 15:15:35,972 INFO L125 PetriNetUnfolderBase]: For 182309/182315 co-relation queries the response was YES. [2024-01-27 15:15:36,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167563 conditions, 43758 events. 29607/43758 cut-off events. For 182309/182315 co-relation queries the response was YES. Maximal size of possible extension queue 2085. Compared 310716 event pairs, 7598 based on Foata normal form. 26/43782 useless extension candidates. Maximal degree in co-relation 157341. Up to 27571 conditions per place. [2024-01-27 15:15:36,345 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 197 selfloop transitions, 107 changer transitions 5/313 dead transitions. [2024-01-27 15:15:36,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 313 transitions, 3378 flow [2024-01-27 15:15:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:15:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:15:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 279 transitions. [2024-01-27 15:15:36,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-01-27 15:15:36,352 INFO L175 Difference]: Start difference. First operand has 131 places, 161 transitions, 1695 flow. Second operand 15 states and 279 transitions. [2024-01-27 15:15:36,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 313 transitions, 3378 flow [2024-01-27 15:15:38,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 313 transitions, 3235 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-01-27 15:15:38,101 INFO L231 Difference]: Finished difference. Result has 143 places, 206 transitions, 2500 flow [2024-01-27 15:15:38,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2500, PETRI_PLACES=143, PETRI_TRANSITIONS=206} [2024-01-27 15:15:38,102 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 104 predicate places. [2024-01-27 15:15:38,103 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 206 transitions, 2500 flow [2024-01-27 15:15:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.238095238095237) internal successors, (215), 21 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 15:15:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:15:38,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2024-01-27 15:15:38,128 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 15:15:38,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:15:38,323 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 15:15:38,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:15:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash 697274918, now seen corresponding path program 2 times [2024-01-27 15:15:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:15:38,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432016102] [2024-01-27 15:15:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:15:38,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:15:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:15:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:15:40,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:15:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432016102] [2024-01-27 15:15:40,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432016102] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:15:40,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7102678] [2024-01-27 15:15:40,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:15:40,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:15:40,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:15:40,384 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 15:15:40,386 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 15:15:40,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:15:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:15:40,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:15:40,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:15:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:15:41,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:15:42,054 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-01-27 15:15:42,054 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 77 treesize of output 237 [2024-01-27 15:15:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:15:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7102678] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:15:51,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:15:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 7] total 25 [2024-01-27 15:15:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771617309] [2024-01-27 15:15:51,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:15:51,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-27 15:15:51,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:15:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-27 15:15:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-01-27 15:15:51,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-01-27 15:15:51,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 206 transitions, 2500 flow. Second operand has 26 states, 26 states have (on average 10.076923076923077) internal successors, (262), 26 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 15:15:51,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:15:51,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-01-27 15:15:51,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:15:57,572 INFO L124 PetriNetUnfolderBase]: 30495/45096 cut-off events. [2024-01-27 15:15:57,572 INFO L125 PetriNetUnfolderBase]: For 218879/218885 co-relation queries the response was YES. [2024-01-27 15:15:58,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181050 conditions, 45096 events. 30495/45096 cut-off events. For 218879/218885 co-relation queries the response was YES. Maximal size of possible extension queue 2168. Compared 321730 event pairs, 13294 based on Foata normal form. 6/45100 useless extension candidates. Maximal degree in co-relation 172342. Up to 41737 conditions per place. [2024-01-27 15:15:58,170 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 195 selfloop transitions, 75 changer transitions 21/295 dead transitions. [2024-01-27 15:15:58,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 295 transitions, 3576 flow [2024-01-27 15:15:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:15:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:15:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 256 transitions. [2024-01-27 15:15:58,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585434173669468 [2024-01-27 15:15:58,173 INFO L175 Difference]: Start difference. First operand has 143 places, 206 transitions, 2500 flow. Second operand 17 states and 256 transitions. [2024-01-27 15:15:58,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 295 transitions, 3576 flow [2024-01-27 15:16:00,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 295 transitions, 3407 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-01-27 15:16:00,766 INFO L231 Difference]: Finished difference. Result has 158 places, 222 transitions, 2793 flow [2024-01-27 15:16:00,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2793, PETRI_PLACES=158, PETRI_TRANSITIONS=222} [2024-01-27 15:16:00,767 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 119 predicate places. [2024-01-27 15:16:00,767 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 222 transitions, 2793 flow [2024-01-27 15:16:00,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.076923076923077) internal successors, (262), 26 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 15:16:00,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:16:00,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2024-01-27 15:16:00,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:16:00,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:16:00,979 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 15:16:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:16:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 206279508, now seen corresponding path program 3 times [2024-01-27 15:16:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:16:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943800863] [2024-01-27 15:16:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:16:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:16:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:16:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:16:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:16:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943800863] [2024-01-27 15:16:02,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943800863] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:16:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174387181] [2024-01-27 15:16:02,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:16:02,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:16:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:16:02,615 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 15:16:02,616 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 15:16:02,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:16:02,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:16:02,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-27 15:16:02,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:16:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:16:03,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:16:04,148 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2024-01-27 15:16:04,148 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 108 treesize of output 328