./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/test-context1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/test-context1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:09:20,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:09:20,935 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:09:20,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:09:20,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:09:20,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:09:20,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:09:20,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:09:20,968 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:09:20,971 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:09:20,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:09:20,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:09:20,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:09:20,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:09:20,973 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:09:20,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:09:20,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:09:20,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:09:20,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:09:20,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:09:20,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:09:20,975 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:09:20,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:09:20,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:09:20,976 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:09:20,976 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:09:20,976 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:09:20,976 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:09:20,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:09:20,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:09:20,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:09:20,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:09:20,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:09:20,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:09:20,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:09:20,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:09:20,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:09:20,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:09:20,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:09:20,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:09:20,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:09:20,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:09:20,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:09:20,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:09:21,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:09:21,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:09:21,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:09:21,273 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:09:21,273 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:09:21,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/test-context1.wvr.yml/witness.yml [2024-06-28 01:09:21,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:09:21,347 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:09:21,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-06-28 01:09:22,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:09:22,595 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:09:22,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-06-28 01:09:22,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c17dfeee1/10ae9221b263445183a3d606ed460628/FLAGe10ab4667 [2024-06-28 01:09:22,613 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c17dfeee1/10ae9221b263445183a3d606ed460628 [2024-06-28 01:09:22,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:09:22,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:09:22,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:09:22,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:09:22,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:09:22,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:09:21" (1/2) ... [2024-06-28 01:09:22,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84d263c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:09:22, skipping insertion in model container [2024-06-28 01:09:22,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:09:21" (1/2) ... [2024-06-28 01:09:22,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@60e73d7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:09:22, skipping insertion in model container [2024-06-28 01:09:22,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:09:22" (2/2) ... [2024-06-28 01:09:22,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84d263c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22, skipping insertion in model container [2024-06-28 01:09:22,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:09:22" (2/2) ... [2024-06-28 01:09:22,625 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:09:22,643 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:09:22,648 INFO L97 edCorrectnessWitness]: Location invariant before [L80-L80] (! multithreaded || 0 <= front) && (! multithreaded || 0 <= front) [2024-06-28 01:09:22,648 INFO L97 edCorrectnessWitness]: Location invariant before [L81-L81] (! multithreaded || 0 <= front) && (! multithreaded || 0 <= front) [2024-06-28 01:09:22,648 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:09:22,648 INFO L106 edCorrectnessWitness]: ghost_update [L79-L79] multithreaded = 1; [2024-06-28 01:09:22,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:09:22,827 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2024-06-28 01:09:22,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:09:22,841 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:09:22,887 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2024-06-28 01:09:22,890 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:09:22,905 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:09:22,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22 WrapperNode [2024-06-28 01:09:22,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:09:22,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:09:22,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:09:22,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:09:22,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,950 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 132 [2024-06-28 01:09:22,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:09:22,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:09:22,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:09:22,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:09:22,970 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,982 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-28 01:09:22,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,990 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:09:22,993 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:09:22,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:09:22,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:09:22,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (1/1) ... [2024-06-28 01:09:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:09:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:23,038 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) [2024-06-28 01:09:23,041 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 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:09:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:09:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:09:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:09:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 01:09:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 01:09:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-28 01:09:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:09:23,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:09:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:09:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:09:23,126 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:09:23,202 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:09:23,203 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:09:23,428 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:09:23,428 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:09:23,608 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:09:23,608 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-28 01:09:23,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:09:23 BoogieIcfgContainer [2024-06-28 01:09:23,610 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:09:23,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:09:23,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:09:23,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:09:23,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:09:21" (1/4) ... [2024-06-28 01:09:23,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f6b18f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:09:23, skipping insertion in model container [2024-06-28 01:09:23,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:09:22" (2/4) ... [2024-06-28 01:09:23,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f6b18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:09:23, skipping insertion in model container [2024-06-28 01:09:23,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:09:22" (3/4) ... [2024-06-28 01:09:23,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f6b18f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:09:23, skipping insertion in model container [2024-06-28 01:09:23,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:09:23" (4/4) ... [2024-06-28 01:09:23,621 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-06-28 01:09:23,636 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:09:23,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:09:23,636 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:09:23,682 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 01:09:23,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 33 transitions, 80 flow [2024-06-28 01:09:23,732 INFO L124 PetriNetUnfolderBase]: 5/31 cut-off events. [2024-06-28 01:09:23,732 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 01:09:23,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 5/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-06-28 01:09:23,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 33 transitions, 80 flow [2024-06-28 01:09:23,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 72 flow [2024-06-28 01:09:23,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:09:23,747 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=false, 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;@419c32eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:09:23,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:09:23,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:09:23,750 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-06-28 01:09:23,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:09:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:23,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-28 01:09:23,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:23,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -841139295, now seen corresponding path program 1 times [2024-06-28 01:09:23,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:23,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671979194] [2024-06-28 01:09:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671979194] [2024-06-28 01:09:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671979194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:09:23,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:09:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:09:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103848621] [2024-06-28 01:09:23,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:09:23,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:09:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:09:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:09:23,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:09:23,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:24,076 INFO L124 PetriNetUnfolderBase]: 124/238 cut-off events. [2024-06-28 01:09:24,076 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-28 01:09:24,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 238 events. 124/238 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 842 event pairs, 95 based on Foata normal form. 36/244 useless extension candidates. Maximal degree in co-relation 431. Up to 219 conditions per place. [2024-06-28 01:09:24,094 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 20 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2024-06-28 01:09:24,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 106 flow [2024-06-28 01:09:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:09:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:09:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-06-28 01:09:24,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-28 01:09:24,105 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 46 transitions. [2024-06-28 01:09:24,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 106 flow [2024-06-28 01:09:24,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:09:24,110 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 58 flow [2024-06-28 01:09:24,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2024-06-28 01:09:24,114 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2024-06-28 01:09:24,114 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 58 flow [2024-06-28 01:09:24,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:09:24,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:24,115 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] [2024-06-28 01:09:24,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:09:24,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:24,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash 662226631, now seen corresponding path program 1 times [2024-06-28 01:09:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99310349] [2024-06-28 01:09:24,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:24,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:24,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99310349] [2024-06-28 01:09:24,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99310349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:09:24,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:09:24,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:09:24,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835005155] [2024-06-28 01:09:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:09:24,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:09:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:09:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:09:24,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:09:24,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-28 01:09:24,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:24,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:09:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:24,331 INFO L124 PetriNetUnfolderBase]: 209/380 cut-off events. [2024-06-28 01:09:24,332 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-28 01:09:24,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 380 events. 209/380 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1440 event pairs, 87 based on Foata normal form. 1/329 useless extension candidates. Maximal degree in co-relation 746. Up to 186 conditions per place. [2024-06-28 01:09:24,338 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 29 selfloop transitions, 2 changer transitions 3/39 dead transitions. [2024-06-28 01:09:24,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 154 flow [2024-06-28 01:09:24,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:09:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:09:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-06-28 01:09:24,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2024-06-28 01:09:24,341 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 58 flow. Second operand 3 states and 62 transitions. [2024-06-28 01:09:24,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 154 flow [2024-06-28 01:09:24,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:09:24,344 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 69 flow [2024-06-28 01:09:24,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-06-28 01:09:24,346 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2024-06-28 01:09:24,347 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 69 flow [2024-06-28 01:09:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2024-06-28 01:09:24,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:24,349 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] [2024-06-28 01:09:24,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:09:24,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:24,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:24,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1450063465, now seen corresponding path program 1 times [2024-06-28 01:09:24,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:24,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952994901] [2024-06-28 01:09:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:24,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952994901] [2024-06-28 01:09:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952994901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:09:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:09:24,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:09:24,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569923514] [2024-06-28 01:09:24,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:09:24,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:09:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:09:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:09:24,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:09:24,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-06-28 01:09:24,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:24,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:09:24,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:24,525 INFO L124 PetriNetUnfolderBase]: 261/479 cut-off events. [2024-06-28 01:09:24,526 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-28 01:09:24,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 479 events. 261/479 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1882 event pairs, 117 based on Foata normal form. 11/419 useless extension candidates. Maximal degree in co-relation 984. Up to 317 conditions per place. [2024-06-28 01:09:24,530 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 29 selfloop transitions, 2 changer transitions 6/42 dead transitions. [2024-06-28 01:09:24,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 176 flow [2024-06-28 01:09:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:09:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:09:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-06-28 01:09:24,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-06-28 01:09:24,532 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 69 flow. Second operand 3 states and 64 transitions. [2024-06-28 01:09:24,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 176 flow [2024-06-28 01:09:24,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:09:24,535 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 79 flow [2024-06-28 01:09:24,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2024-06-28 01:09:24,536 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2024-06-28 01:09:24,536 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 79 flow [2024-06-28 01:09:24,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-06-28 01:09:24,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:24,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:09:24,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:24,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 279619098, now seen corresponding path program 1 times [2024-06-28 01:09:24,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956135551] [2024-06-28 01:09:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:24,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:24,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956135551] [2024-06-28 01:09:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956135551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:09:24,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:09:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:09:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107469196] [2024-06-28 01:09:24,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:09:24,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:09:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:09:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:09:24,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:09:24,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2024-06-28 01:09:24,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:24,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:09:24,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:24,833 INFO L124 PetriNetUnfolderBase]: 333/650 cut-off events. [2024-06-28 01:09:24,833 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-06-28 01:09:24,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 650 events. 333/650 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2982 event pairs, 298 based on Foata normal form. 13/567 useless extension candidates. Maximal degree in co-relation 1355. Up to 463 conditions per place. [2024-06-28 01:09:24,835 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 22 selfloop transitions, 2 changer transitions 16/45 dead transitions. [2024-06-28 01:09:24,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 197 flow [2024-06-28 01:09:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:09:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:09:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-06-28 01:09:24,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-28 01:09:24,838 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 79 flow. Second operand 4 states and 75 transitions. [2024-06-28 01:09:24,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 197 flow [2024-06-28 01:09:24,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:09:24,840 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 91 flow [2024-06-28 01:09:24,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-06-28 01:09:24,841 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-06-28 01:09:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 91 flow [2024-06-28 01:09:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 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) [2024-06-28 01:09:24,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:24,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-06-28 01:09:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:09:24,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:24,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -576313161, now seen corresponding path program 1 times [2024-06-28 01:09:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936465894] [2024-06-28 01:09:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:09:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936465894] [2024-06-28 01:09:25,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936465894] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284449466] [2024-06-28 01:09:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:25,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:25,165 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) [2024-06-28 01:09:25,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:09:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:25,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:09:25,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:09:25,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:25,442 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:09:25,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-06-28 01:09:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:09:25,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284449466] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:25,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:25,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-06-28 01:09:25,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160076499] [2024-06-28 01:09:25,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:25,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:09:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:09:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:09:25,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:25,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 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) [2024-06-28 01:09:25,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:25,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:25,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:25,657 INFO L124 PetriNetUnfolderBase]: 341/616 cut-off events. [2024-06-28 01:09:25,658 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-06-28 01:09:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 616 events. 341/616 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2423 event pairs, 72 based on Foata normal form. 1/525 useless extension candidates. Maximal degree in co-relation 1332. Up to 168 conditions per place. [2024-06-28 01:09:25,660 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 46 selfloop transitions, 5 changer transitions 12/68 dead transitions. [2024-06-28 01:09:25,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 308 flow [2024-06-28 01:09:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:09:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:09:25,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 01:09:25,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-28 01:09:25,663 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 91 flow. Second operand 6 states and 105 transitions. [2024-06-28 01:09:25,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 308 flow [2024-06-28 01:09:25,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 01:09:25,666 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 105 flow [2024-06-28 01:09:25,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2024-06-28 01:09:25,668 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2024-06-28 01:09:25,668 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 105 flow [2024-06-28 01:09:25,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 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) [2024-06-28 01:09:25,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:25,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:25,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-28 01:09:25,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:25,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:25,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1532120133, now seen corresponding path program 2 times [2024-06-28 01:09:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:25,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117761156] [2024-06-28 01:09:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:25,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:09:25,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:25,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117761156] [2024-06-28 01:09:25,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117761156] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:25,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130756579] [2024-06-28 01:09:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:09:25,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:25,944 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) [2024-06-28 01:09:25,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:09:26,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:09:26,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:26,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-28 01:09:26,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:09:26,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:09:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130756579] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:26,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2024-06-28 01:09:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862733569] [2024-06-28 01:09:26,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:09:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:09:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:09:26,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:09:26,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-06-28 01:09:26,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:26,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:09:26,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:26,294 INFO L124 PetriNetUnfolderBase]: 734/1308 cut-off events. [2024-06-28 01:09:26,294 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2024-06-28 01:09:26,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2922 conditions, 1308 events. 734/1308 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6004 event pairs, 284 based on Foata normal form. 22/1131 useless extension candidates. Maximal degree in co-relation 2908. Up to 473 conditions per place. [2024-06-28 01:09:26,299 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 53 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-28 01:09:26,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 329 flow [2024-06-28 01:09:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:09:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:09:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-28 01:09:26,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-06-28 01:09:26,301 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 105 flow. Second operand 4 states and 91 transitions. [2024-06-28 01:09:26,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 329 flow [2024-06-28 01:09:26,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 65 transitions, 315 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 01:09:26,304 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 159 flow [2024-06-28 01:09:26,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-06-28 01:09:26,306 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2024-06-28 01:09:26,306 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 159 flow [2024-06-28 01:09:26,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-06-28 01:09:26,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:26,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:26,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-28 01:09:26,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-28 01:09:26,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:26,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash 125621374, now seen corresponding path program 3 times [2024-06-28 01:09:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:26,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218106470] [2024-06-28 01:09:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:26,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218106470] [2024-06-28 01:09:26,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218106470] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294963901] [2024-06-28 01:09:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:09:26,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:26,662 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) [2024-06-28 01:09:26,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:09:26,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:09:26,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:26,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-28 01:09:26,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:26,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-28 01:09:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-28 01:09:26,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:27,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-06-28 01:09:27,234 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:09:27,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 53 treesize of output 41 [2024-06-28 01:09:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-28 01:09:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294963901] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:27,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-06-28 01:09:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8935795] [2024-06-28 01:09:27,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:27,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 01:09:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 01:09:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-06-28 01:09:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:27,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 159 flow. Second operand has 15 states, 15 states have (on average 11.666666666666666) internal successors, (175), 15 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:09:27,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:27,590 INFO L124 PetriNetUnfolderBase]: 960/1760 cut-off events. [2024-06-28 01:09:27,590 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2024-06-28 01:09:27,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4163 conditions, 1760 events. 960/1760 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8981 event pairs, 490 based on Foata normal form. 23/1513 useless extension candidates. Maximal degree in co-relation 4149. Up to 820 conditions per place. [2024-06-28 01:09:27,597 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 36 selfloop transitions, 5 changer transitions 35/81 dead transitions. [2024-06-28 01:09:27,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 81 transitions, 443 flow [2024-06-28 01:09:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:09:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:09:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 01:09:27,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-28 01:09:27,598 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 159 flow. Second operand 7 states and 118 transitions. [2024-06-28 01:09:27,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 81 transitions, 443 flow [2024-06-28 01:09:27,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 81 transitions, 435 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 01:09:27,600 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 181 flow [2024-06-28 01:09:27,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-06-28 01:09:27,602 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2024-06-28 01:09:27,602 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 181 flow [2024-06-28 01:09:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.666666666666666) internal successors, (175), 15 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:09:27,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:27,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:27,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 01:09:27,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:27,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:27,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1834715179, now seen corresponding path program 4 times [2024-06-28 01:09:27,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:27,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139652049] [2024-06-28 01:09:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:27,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139652049] [2024-06-28 01:09:28,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139652049] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374047107] [2024-06-28 01:09:28,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:09:28,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:28,153 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) [2024-06-28 01:09:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 01:09:28,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:09:28,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:28,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-28 01:09:28,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:09:32,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:32,472 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:09:32,472 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 28 treesize of output 11 [2024-06-28 01:09:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:09:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374047107] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:32,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2024-06-28 01:09:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673136205] [2024-06-28 01:09:32,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-28 01:09:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-28 01:09:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=180, Unknown=1, NotChecked=0, Total=240 [2024-06-28 01:09:36,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-06-28 01:09:40,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-06-28 01:09:44,628 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 [0] [2024-06-28 01:09:44,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-28 01:09:44,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 181 flow. Second operand has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 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) [2024-06-28 01:09:44,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:44,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-28 01:09:44,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:45,718 INFO L124 PetriNetUnfolderBase]: 3752/6173 cut-off events. [2024-06-28 01:09:45,719 INFO L125 PetriNetUnfolderBase]: For 4369/4369 co-relation queries the response was YES. [2024-06-28 01:09:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14916 conditions, 6173 events. 3752/6173 cut-off events. For 4369/4369 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 34637 event pairs, 268 based on Foata normal form. 48/5308 useless extension candidates. Maximal degree in co-relation 14897. Up to 810 conditions per place. [2024-06-28 01:09:45,738 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 143 selfloop transitions, 38 changer transitions 72/257 dead transitions. [2024-06-28 01:09:45,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 257 transitions, 1354 flow [2024-06-28 01:09:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:09:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:09:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 376 transitions. [2024-06-28 01:09:45,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5696969696969697 [2024-06-28 01:09:45,740 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 181 flow. Second operand 20 states and 376 transitions. [2024-06-28 01:09:45,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 257 transitions, 1354 flow [2024-06-28 01:09:45,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 257 transitions, 1334 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 01:09:45,747 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 603 flow [2024-06-28 01:09:45,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=603, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2024-06-28 01:09:45,749 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2024-06-28 01:09:45,749 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 603 flow [2024-06-28 01:09:45,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.125) internal successors, (162), 16 states have internal predecessors, (162), 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) [2024-06-28 01:09:45,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:45,750 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:45,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-28 01:09:45,961 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 [2024-06-28 01:09:45,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:45,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash -407992394, now seen corresponding path program 5 times [2024-06-28 01:09:45,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:45,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554266077] [2024-06-28 01:09:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-06-28 01:09:46,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:46,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554266077] [2024-06-28 01:09:46,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554266077] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:46,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269662372] [2024-06-28 01:09:46,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:09:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:46,174 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) [2024-06-28 01:09:46,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 01:09:46,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:09:46,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:46,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 01:09:46,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:09:46,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:09:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269662372] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:46,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-06-28 01:09:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979367280] [2024-06-28 01:09:46,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:09:46,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:09:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:09:46,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:46,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 603 flow. Second operand has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 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) [2024-06-28 01:09:46,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:46,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:46,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:47,596 INFO L124 PetriNetUnfolderBase]: 2916/5143 cut-off events. [2024-06-28 01:09:47,596 INFO L125 PetriNetUnfolderBase]: For 7644/7644 co-relation queries the response was YES. [2024-06-28 01:09:47,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13373 conditions, 5143 events. 2916/5143 cut-off events. For 7644/7644 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 31604 event pairs, 2133 based on Foata normal form. 53/4397 useless extension candidates. Maximal degree in co-relation 13342. Up to 4015 conditions per place. [2024-06-28 01:09:47,616 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 60 selfloop transitions, 4 changer transitions 84/153 dead transitions. [2024-06-28 01:09:47,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 153 transitions, 1167 flow [2024-06-28 01:09:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:09:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:09:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 01:09:47,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-06-28 01:09:47,617 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 603 flow. Second operand 11 states and 187 transitions. [2024-06-28 01:09:47,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 153 transitions, 1167 flow [2024-06-28 01:09:47,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 968 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-28 01:09:47,640 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 465 flow [2024-06-28 01:09:47,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=465, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2024-06-28 01:09:47,641 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 55 predicate places. [2024-06-28 01:09:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 465 flow [2024-06-28 01:09:47,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 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) [2024-06-28 01:09:47,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:47,642 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:47,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-28 01:09:47,853 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 [2024-06-28 01:09:47,854 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:47,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1506101541, now seen corresponding path program 6 times [2024-06-28 01:09:47,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:47,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572569741] [2024-06-28 01:09:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:47,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:48,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572569741] [2024-06-28 01:09:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572569741] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790243623] [2024-06-28 01:09:48,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:09:48,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:48,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:48,355 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) [2024-06-28 01:09:48,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 01:09:48,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:09:48,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:48,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-28 01:09:48,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:48,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-28 01:09:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:48,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:49,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-06-28 01:09:49,064 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:09:49,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 47 [2024-06-28 01:09:49,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:09:49,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790243623] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:49,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:49,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-06-28 01:09:49,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120043466] [2024-06-28 01:09:49,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:49,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-28 01:09:49,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-28 01:09:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-06-28 01:09:49,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:49,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 465 flow. Second operand has 30 states, 30 states have (on average 10.333333333333334) internal successors, (310), 30 states have internal predecessors, (310), 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) [2024-06-28 01:09:49,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:49,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:49,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:50,552 INFO L124 PetriNetUnfolderBase]: 2487/4306 cut-off events. [2024-06-28 01:09:50,552 INFO L125 PetriNetUnfolderBase]: For 3398/3398 co-relation queries the response was YES. [2024-06-28 01:09:50,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10484 conditions, 4306 events. 2487/4306 cut-off events. For 3398/3398 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 24006 event pairs, 216 based on Foata normal form. 1/3643 useless extension candidates. Maximal degree in co-relation 10447. Up to 796 conditions per place. [2024-06-28 01:09:50,571 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 124 selfloop transitions, 43 changer transitions 57/229 dead transitions. [2024-06-28 01:09:50,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 229 transitions, 1296 flow [2024-06-28 01:09:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:09:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:09:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 334 transitions. [2024-06-28 01:09:50,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532695374800638 [2024-06-28 01:09:50,573 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 465 flow. Second operand 19 states and 334 transitions. [2024-06-28 01:09:50,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 229 transitions, 1296 flow [2024-06-28 01:09:50,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 229 transitions, 1254 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 01:09:50,586 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 550 flow [2024-06-28 01:09:50,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=550, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-06-28 01:09:50,587 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 59 predicate places. [2024-06-28 01:09:50,587 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 550 flow [2024-06-28 01:09:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.333333333333334) internal successors, (310), 30 states have internal predecessors, (310), 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) [2024-06-28 01:09:50,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:50,588 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:50,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-28 01:09:50,799 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 [2024-06-28 01:09:50,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:50,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:50,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1515801521, now seen corresponding path program 7 times [2024-06-28 01:09:50,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:50,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212035903] [2024-06-28 01:09:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-28 01:09:51,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212035903] [2024-06-28 01:09:51,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212035903] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:51,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629380313] [2024-06-28 01:09:51,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:09:51,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:51,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:51,044 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) [2024-06-28 01:09:51,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 01:09:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:51,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:09:51,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-28 01:09:51,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-28 01:09:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629380313] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:51,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:51,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-06-28 01:09:51,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097583733] [2024-06-28 01:09:51,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:51,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-28 01:09:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-28 01:09:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-28 01:09:51,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:51,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 550 flow. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 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) [2024-06-28 01:09:51,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:51,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:51,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:09:52,711 INFO L124 PetriNetUnfolderBase]: 7910/13750 cut-off events. [2024-06-28 01:09:52,711 INFO L125 PetriNetUnfolderBase]: For 12317/12317 co-relation queries the response was YES. [2024-06-28 01:09:52,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33274 conditions, 13750 events. 7910/13750 cut-off events. For 12317/12317 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 94901 event pairs, 1641 based on Foata normal form. 176/11777 useless extension candidates. Maximal degree in co-relation 33242. Up to 2525 conditions per place. [2024-06-28 01:09:52,762 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 98 selfloop transitions, 69 changer transitions 191/363 dead transitions. [2024-06-28 01:09:52,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 363 transitions, 2671 flow [2024-06-28 01:09:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:09:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:09:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 374 transitions. [2024-06-28 01:09:52,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 01:09:52,764 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 550 flow. Second operand 20 states and 374 transitions. [2024-06-28 01:09:52,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 363 transitions, 2671 flow [2024-06-28 01:09:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 363 transitions, 2579 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 01:09:52,810 INFO L231 Difference]: Finished difference. Result has 108 places, 112 transitions, 1011 flow [2024-06-28 01:09:52,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1011, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2024-06-28 01:09:52,811 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 76 predicate places. [2024-06-28 01:09:52,811 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 1011 flow [2024-06-28 01:09:52,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 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) [2024-06-28 01:09:52,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:09:52,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:09:52,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-28 01:09:53,023 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 [2024-06-28 01:09:53,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:09:53,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:09:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -542102699, now seen corresponding path program 8 times [2024-06-28 01:09:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:09:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187055035] [2024-06-28 01:09:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:09:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:09:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:09:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-28 01:09:53,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:09:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187055035] [2024-06-28 01:09:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187055035] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:09:53,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563640029] [2024-06-28 01:09:53,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:09:53,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:09:53,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:09:53,557 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) [2024-06-28 01:09:53,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 01:09:53,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:09:53,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:09:53,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 46 conjunts are in the unsatisfiable core [2024-06-28 01:09:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:09:53,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-28 01:09:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:09:54,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:09:54,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-06-28 01:09:54,436 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:09:54,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 47 [2024-06-28 01:09:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:09:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563640029] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:09:54,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:09:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 35 [2024-06-28 01:09:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058820538] [2024-06-28 01:09:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:09:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-28 01:09:54,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:09:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-28 01:09:54,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2024-06-28 01:09:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:09:54,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 1011 flow. Second operand has 36 states, 36 states have (on average 10.0) internal successors, (360), 36 states have internal predecessors, (360), 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) [2024-06-28 01:09:54,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:09:54,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:09:54,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:00,019 INFO L124 PetriNetUnfolderBase]: 15396/26353 cut-off events. [2024-06-28 01:10:00,019 INFO L125 PetriNetUnfolderBase]: For 33404/33404 co-relation queries the response was YES. [2024-06-28 01:10:00,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67345 conditions, 26353 events. 15396/26353 cut-off events. For 33404/33404 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 191037 event pairs, 705 based on Foata normal form. 29/22313 useless extension candidates. Maximal degree in co-relation 67307. Up to 4825 conditions per place. [2024-06-28 01:10:00,513 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 770 selfloop transitions, 297 changer transitions 192/1264 dead transitions. [2024-06-28 01:10:00,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1264 transitions, 8594 flow [2024-06-28 01:10:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-06-28 01:10:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-06-28 01:10:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1696 transitions. [2024-06-28 01:10:00,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046345811051693 [2024-06-28 01:10:00,519 INFO L175 Difference]: Start difference. First operand has 108 places, 112 transitions, 1011 flow. Second operand 85 states and 1696 transitions. [2024-06-28 01:10:00,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1264 transitions, 8594 flow [2024-06-28 01:10:00,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 1264 transitions, 8542 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 01:10:00,617 INFO L231 Difference]: Finished difference. Result has 207 places, 331 transitions, 3992 flow [2024-06-28 01:10:00,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3992, PETRI_PLACES=207, PETRI_TRANSITIONS=331} [2024-06-28 01:10:00,619 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 175 predicate places. [2024-06-28 01:10:00,619 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 331 transitions, 3992 flow [2024-06-28 01:10:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.0) internal successors, (360), 36 states have internal predecessors, (360), 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) [2024-06-28 01:10:00,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:00,621 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:00,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-28 01:10:00,835 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 [2024-06-28 01:10:00,836 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:00,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash 342264763, now seen corresponding path program 9 times [2024-06-28 01:10:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841538681] [2024-06-28 01:10:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:10:01,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841538681] [2024-06-28 01:10:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841538681] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:10:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339784515] [2024-06-28 01:10:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:10:01,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:10:01,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:10:01,310 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) [2024-06-28 01:10:01,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-28 01:10:01,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 01:10:01,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:10:01,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-28 01:10:01,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:10:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-06-28 01:10:01,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:10:02,042 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:10:02,043 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 28 treesize of output 11 [2024-06-28 01:10:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-06-28 01:10:02,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339784515] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:10:02,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:10:02,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2024-06-28 01:10:02,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573741840] [2024-06-28 01:10:02,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:10:02,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-28 01:10:02,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:02,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-28 01:10:02,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-06-28 01:10:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:10:02,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 331 transitions, 3992 flow. Second operand has 36 states, 36 states have (on average 9.944444444444445) internal successors, (358), 36 states have internal predecessors, (358), 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) [2024-06-28 01:10:02,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:02,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:10:02,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:10:18,990 INFO L124 PetriNetUnfolderBase]: 46554/79482 cut-off events. [2024-06-28 01:10:18,990 INFO L125 PetriNetUnfolderBase]: For 322905/322905 co-relation queries the response was YES. [2024-06-28 01:10:20,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227744 conditions, 79482 events. 46554/79482 cut-off events. For 322905/322905 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 678379 event pairs, 5941 based on Foata normal form. 120/67307 useless extension candidates. Maximal degree in co-relation 227677. Up to 14600 conditions per place. [2024-06-28 01:10:20,332 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 721 selfloop transitions, 847 changer transitions 258/1831 dead transitions. [2024-06-28 01:10:20,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 1831 transitions, 19155 flow [2024-06-28 01:10:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-06-28 01:10:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-06-28 01:10:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1706 transitions. [2024-06-28 01:10:20,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081996434937611 [2024-06-28 01:10:20,336 INFO L175 Difference]: Start difference. First operand has 207 places, 331 transitions, 3992 flow. Second operand 85 states and 1706 transitions. [2024-06-28 01:10:20,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 1831 transitions, 19155 flow [2024-06-28 01:10:22,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1831 transitions, 16912 flow, removed 670 selfloop flow, removed 12 redundant places. [2024-06-28 01:10:22,778 INFO L231 Difference]: Finished difference. Result has 334 places, 894 transitions, 12583 flow [2024-06-28 01:10:22,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=12583, PETRI_PLACES=334, PETRI_TRANSITIONS=894} [2024-06-28 01:10:22,779 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 302 predicate places. [2024-06-28 01:10:22,779 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 894 transitions, 12583 flow [2024-06-28 01:10:22,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.944444444444445) internal successors, (358), 36 states have internal predecessors, (358), 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) [2024-06-28 01:10:22,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:10:22,779 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:10:22,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-28 01:10:22,986 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 [2024-06-28 01:10:22,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:10:22,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:10:22,988 INFO L85 PathProgramCache]: Analyzing trace with hash -471185974, now seen corresponding path program 10 times [2024-06-28 01:10:22,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:10:22,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320152155] [2024-06-28 01:10:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:10:22,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:10:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:10:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-06-28 01:10:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:10:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320152155] [2024-06-28 01:10:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320152155] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:10:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894119659] [2024-06-28 01:10:23,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:10:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:10:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:10:23,178 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) [2024-06-28 01:10:23,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-28 01:10:23,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:10:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:10:23,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-28 01:10:23,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:10:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-28 01:10:23,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:10:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-06-28 01:10:23,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894119659] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:10:23,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:10:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-06-28 01:10:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014832922] [2024-06-28 01:10:23,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:10:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:10:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:10:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:10:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:10:23,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:10:23,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 894 transitions, 12583 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 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) [2024-06-28 01:10:23,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:10:23,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:10:23,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand