./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.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/popl20-bad-buffer-mult-alt.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/popl20-bad-buffer-mult-alt.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/popl20-bad-buffer-mult-alt.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 02:15:12,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:15:12,803 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:15:12,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:15:12,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:15:12,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:15:12,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:15:12,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:15:12,853 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:15:12,857 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:15:12,858 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:15:12,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:15:12,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:15:12,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:15:12,860 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:15:12,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:15:12,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:15:12,861 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:15:12,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:15:12,861 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:15:12,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:15:12,862 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:15:12,862 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:15:12,862 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:15:12,862 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:15:12,862 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:15:12,863 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:15:12,863 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:15:12,863 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:15:12,864 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:15:12,864 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:15:12,865 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:15:12,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:15:12,865 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:15:12,865 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:15:12,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:15:12,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:15:12,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:15:12,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:15:12,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:15:12,866 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:15:12,867 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:15:12,867 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:15:12,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:15:13,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:15:13,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:15:13,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:15:13,121 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:15:13,122 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:15:13,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/popl20-bad-buffer-mult-alt.wvr.yml/witness.yml [2024-06-28 02:15:13,197 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:15:13,197 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:15:13,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-06-28 02:15:14,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:15:14,444 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:15:14,447 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-06-28 02:15:14,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108cb1509/ac743559222d44eb969116c9f2a30652/FLAG3d8e8ceff [2024-06-28 02:15:14,472 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108cb1509/ac743559222d44eb969116c9f2a30652 [2024-06-28 02:15:14,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:15:14,474 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:15:14,475 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:15:14,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:15:14,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:15:14,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:15:13" (1/2) ... [2024-06-28 02:15:14,481 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f691291 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:15:14, skipping insertion in model container [2024-06-28 02:15:14,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:15:13" (1/2) ... [2024-06-28 02:15:14,484 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@75c00fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:15:14, skipping insertion in model container [2024-06-28 02:15:14,484 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:15:14" (2/2) ... [2024-06-28 02:15:14,485 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f691291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14, skipping insertion in model container [2024-06-28 02:15:14,485 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:15:14" (2/2) ... [2024-06-28 02:15:14,485 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:15:14,509 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:15:14,510 INFO L97 edCorrectnessWitness]: Location invariant before [L148-L148] ((! multithreaded || 0 <= j) && (! multithreaded || 0 <= i)) && (! multithreaded || (0 <= i && 0 <= j)) [2024-06-28 02:15:14,510 INFO L97 edCorrectnessWitness]: Location invariant before [L146-L146] ((! multithreaded || 0 <= j) && (! multithreaded || 0 <= i)) && (! multithreaded || (0 <= i && 0 <= j)) [2024-06-28 02:15:14,510 INFO L97 edCorrectnessWitness]: Location invariant before [L145-L145] ((! multithreaded || 0 <= j) && (! multithreaded || 0 <= i)) && (! multithreaded || (0 <= i && 0 <= j)) [2024-06-28 02:15:14,510 INFO L97 edCorrectnessWitness]: Location invariant before [L147-L147] ((! multithreaded || 0 <= j) && (! multithreaded || 0 <= i)) && (! multithreaded || (0 <= i && 0 <= j)) [2024-06-28 02:15:14,511 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:15:14,511 INFO L106 edCorrectnessWitness]: ghost_update [L144-L144] multithreaded = 1; [2024-06-28 02:15:14,534 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:15:14,707 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/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-06-28 02:15:14,719 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:15:14,726 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:15:14,799 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/popl20-bad-buffer-mult-alt.wvr.c[4345,4358] [2024-06-28 02:15:14,803 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:15:14,827 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:15:14,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14 WrapperNode [2024-06-28 02:15:14,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:15:14,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:15:14,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:15:14,828 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:15:14,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,902 INFO L138 Inliner]: procedures = 25, calls = 59, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 318 [2024-06-28 02:15:14,902 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:15:14,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:15:14,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:15:14,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:15:14,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,918 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,944 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-28 02:15:14,947 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,954 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,969 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:15:14,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:15:14,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:15:14,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:15:14,980 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (1/1) ... [2024-06-28 02:15:14,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:15:14,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:15:15,006 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 02:15:15,008 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 02:15:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:15:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 02:15:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 02:15:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 02:15:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 02:15:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-28 02:15:15,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-28 02:15:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-06-28 02:15:15,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-06-28 02:15:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:15:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 02:15:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 02:15:15,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 02:15:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:15:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:15:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-28 02:15:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:15:15,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:15:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 02:15:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 02:15:15,043 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 02:15:15,163 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:15:15,164 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:15:15,554 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:15:15,554 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:15:15,786 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:15:15,786 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-28 02:15:15,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:15:15 BoogieIcfgContainer [2024-06-28 02:15:15,787 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:15:15,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:15:15,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:15:15,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:15:15,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:15:13" (1/4) ... [2024-06-28 02:15:15,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a3f6ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:15:15, skipping insertion in model container [2024-06-28 02:15:15,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:15:14" (2/4) ... [2024-06-28 02:15:15,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a3f6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:15:15, skipping insertion in model container [2024-06-28 02:15:15,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:15:14" (3/4) ... [2024-06-28 02:15:15,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a3f6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:15:15, skipping insertion in model container [2024-06-28 02:15:15,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:15:15" (4/4) ... [2024-06-28 02:15:15,793 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-06-28 02:15:15,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:15:15,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-28 02:15:15,808 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:15:15,878 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-28 02:15:15,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 59 transitions, 146 flow [2024-06-28 02:15:15,926 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-06-28 02:15:15,926 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-28 02:15:15,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 55 events. 6/55 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-06-28 02:15:15,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 59 transitions, 146 flow [2024-06-28 02:15:15,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 54 transitions, 132 flow [2024-06-28 02:15:15,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:15:15,945 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;@20d7fe59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:15:15,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-28 02:15:15,949 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:15:15,949 INFO L124 PetriNetUnfolderBase]: 2/9 cut-off events. [2024-06-28 02:15:15,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:15:15,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:15,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:15,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:15,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1285543393, now seen corresponding path program 1 times [2024-06-28 02:15:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345846991] [2024-06-28 02:15:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:16,201 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 02:15:16,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345846991] [2024-06-28 02:15:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345846991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:16,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:16,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:15:16,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173476455] [2024-06-28 02:15:16,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:15:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:16,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:15:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:15:16,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-06-28 02:15:16,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:16,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:16,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-06-28 02:15:16,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:16,795 INFO L124 PetriNetUnfolderBase]: 3046/4726 cut-off events. [2024-06-28 02:15:16,795 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2024-06-28 02:15:16,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 4726 events. 3046/4726 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31175 event pairs, 743 based on Foata normal form. 81/4385 useless extension candidates. Maximal degree in co-relation 8387. Up to 3092 conditions per place. [2024-06-28 02:15:16,821 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 57 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-06-28 02:15:16,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 323 flow [2024-06-28 02:15:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:15:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:15:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-06-28 02:15:16,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.751412429378531 [2024-06-28 02:15:16,831 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 132 flow. Second operand 3 states and 133 transitions. [2024-06-28 02:15:16,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 323 flow [2024-06-28 02:15:16,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 293 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 02:15:16,839 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 141 flow [2024-06-28 02:15:16,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-28 02:15:16,842 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-06-28 02:15:16,869 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 141 flow [2024-06-28 02:15:16,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:16,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:16,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:15:16,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:16,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1202112869, now seen corresponding path program 1 times [2024-06-28 02:15:16,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:16,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170942178] [2024-06-28 02:15:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:16,971 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 02:15:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170942178] [2024-06-28 02:15:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170942178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:15:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773596666] [2024-06-28 02:15:16,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:15:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:15:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:15:16,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-06-28 02:15:16,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 02:15:16,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:16,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-06-28 02:15:16,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:17,509 INFO L124 PetriNetUnfolderBase]: 3327/5176 cut-off events. [2024-06-28 02:15:17,510 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-06-28 02:15:17,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10841 conditions, 5176 events. 3327/5176 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 35102 event pairs, 728 based on Foata normal form. 120/5021 useless extension candidates. Maximal degree in co-relation 2175. Up to 2414 conditions per place. [2024-06-28 02:15:17,537 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 77 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2024-06-28 02:15:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 100 transitions, 406 flow [2024-06-28 02:15:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:15:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:15:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-06-28 02:15:17,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-28 02:15:17,544 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 141 flow. Second operand 4 states and 177 transitions. [2024-06-28 02:15:17,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 100 transitions, 406 flow [2024-06-28 02:15:17,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 100 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:15:17,550 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 156 flow [2024-06-28 02:15:17,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-28 02:15:17,555 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-06-28 02:15:17,555 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 156 flow [2024-06-28 02:15:17,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 02:15:17,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:17,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:15:17,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:17,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1675990774, now seen corresponding path program 1 times [2024-06-28 02:15:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:17,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367026798] [2024-06-28 02:15:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:17,696 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 02:15:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367026798] [2024-06-28 02:15:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367026798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:15:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181747975] [2024-06-28 02:15:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:17,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:15:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:17,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:15:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:15:17,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-06-28 02:15:17,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 02:15:17,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:17,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-06-28 02:15:17,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:18,216 INFO L124 PetriNetUnfolderBase]: 3641/5793 cut-off events. [2024-06-28 02:15:18,216 INFO L125 PetriNetUnfolderBase]: For 1977/1977 co-relation queries the response was YES. [2024-06-28 02:15:18,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12639 conditions, 5793 events. 3641/5793 cut-off events. For 1977/1977 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 41354 event pairs, 987 based on Foata normal form. 117/5630 useless extension candidates. Maximal degree in co-relation 4936. Up to 2913 conditions per place. [2024-06-28 02:15:18,245 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 78 selfloop transitions, 4 changer transitions 0/101 dead transitions. [2024-06-28 02:15:18,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 101 transitions, 429 flow [2024-06-28 02:15:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:15:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:15:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 176 transitions. [2024-06-28 02:15:18,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7457627118644068 [2024-06-28 02:15:18,246 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 156 flow. Second operand 4 states and 176 transitions. [2024-06-28 02:15:18,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 101 transitions, 429 flow [2024-06-28 02:15:18,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 101 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 02:15:18,249 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 172 flow [2024-06-28 02:15:18,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-28 02:15:18,250 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-06-28 02:15:18,250 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 172 flow [2024-06-28 02:15:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 02:15:18,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:18,251 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] [2024-06-28 02:15:18,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:15:18,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:18,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:18,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1870587700, now seen corresponding path program 1 times [2024-06-28 02:15:18,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:18,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950541473] [2024-06-28 02:15:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:18,344 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 02:15:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950541473] [2024-06-28 02:15:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950541473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:15:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094809401] [2024-06-28 02:15:18,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:18,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:15:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:15:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:15:18,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-06-28 02:15:18,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:18,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:18,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-06-28 02:15:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:18,934 INFO L124 PetriNetUnfolderBase]: 4447/7109 cut-off events. [2024-06-28 02:15:18,934 INFO L125 PetriNetUnfolderBase]: For 3450/3450 co-relation queries the response was YES. [2024-06-28 02:15:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16000 conditions, 7109 events. 4447/7109 cut-off events. For 3450/3450 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 52134 event pairs, 978 based on Foata normal form. 117/6943 useless extension candidates. Maximal degree in co-relation 7639. Up to 2811 conditions per place. [2024-06-28 02:15:19,022 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 100 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-06-28 02:15:19,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 123 transitions, 543 flow [2024-06-28 02:15:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:15:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:15:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 221 transitions. [2024-06-28 02:15:19,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7491525423728813 [2024-06-28 02:15:19,023 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 172 flow. Second operand 5 states and 221 transitions. [2024-06-28 02:15:19,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 123 transitions, 543 flow [2024-06-28 02:15:19,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 123 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 02:15:19,030 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 181 flow [2024-06-28 02:15:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-28 02:15:19,032 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2024-06-28 02:15:19,032 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 181 flow [2024-06-28 02:15:19,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:19,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:19,032 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] [2024-06-28 02:15:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:15:19,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:19,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1870581190, now seen corresponding path program 2 times [2024-06-28 02:15:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:19,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563104543] [2024-06-28 02:15:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:19,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:19,115 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 02:15:19,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:19,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563104543] [2024-06-28 02:15:19,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563104543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:19,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:19,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:15:19,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457999962] [2024-06-28 02:15:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:19,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:15:19,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:15:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:15:19,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-06-28 02:15:19,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:19,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:19,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-06-28 02:15:19,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:19,660 INFO L124 PetriNetUnfolderBase]: 4087/6614 cut-off events. [2024-06-28 02:15:19,660 INFO L125 PetriNetUnfolderBase]: For 3864/3864 co-relation queries the response was YES. [2024-06-28 02:15:19,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14630 conditions, 6614 events. 4087/6614 cut-off events. For 3864/3864 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48687 event pairs, 831 based on Foata normal form. 117/6486 useless extension candidates. Maximal degree in co-relation 11299. Up to 2346 conditions per place. [2024-06-28 02:15:19,690 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 97 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2024-06-28 02:15:19,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 516 flow [2024-06-28 02:15:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:15:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:15:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-06-28 02:15:19,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7389830508474576 [2024-06-28 02:15:19,692 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 181 flow. Second operand 5 states and 218 transitions. [2024-06-28 02:15:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 516 flow [2024-06-28 02:15:19,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 120 transitions, 508 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 02:15:19,698 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 151 flow [2024-06-28 02:15:19,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-28 02:15:19,698 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-06-28 02:15:19,699 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 151 flow [2024-06-28 02:15:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:19,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:19,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:15:19,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:19,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash 532009585, now seen corresponding path program 1 times [2024-06-28 02:15:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:19,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357969203] [2024-06-28 02:15:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:19,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:19,830 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 02:15:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357969203] [2024-06-28 02:15:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357969203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:19,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:19,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:15:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934704629] [2024-06-28 02:15:19,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:19,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:15:19,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:15:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:15:19,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-06-28 02:15:19,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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 02:15:19,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:19,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-06-28 02:15:19,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:20,547 INFO L124 PetriNetUnfolderBase]: 6240/8840 cut-off events. [2024-06-28 02:15:20,547 INFO L125 PetriNetUnfolderBase]: For 2791/2791 co-relation queries the response was YES. [2024-06-28 02:15:20,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 8840 events. 6240/8840 cut-off events. For 2791/2791 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 51838 event pairs, 1062 based on Foata normal form. 183/8891 useless extension candidates. Maximal degree in co-relation 10932. Up to 5788 conditions per place. [2024-06-28 02:15:20,602 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 68 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2024-06-28 02:15:20,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 90 transitions, 389 flow [2024-06-28 02:15:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:15:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:15:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-06-28 02:15:20,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6610169491525424 [2024-06-28 02:15:20,604 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 151 flow. Second operand 5 states and 195 transitions. [2024-06-28 02:15:20,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 90 transitions, 389 flow [2024-06-28 02:15:20,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:15:20,609 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 159 flow [2024-06-28 02:15:20,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-28 02:15:20,609 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2024-06-28 02:15:20,610 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 159 flow [2024-06-28 02:15:20,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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 02:15:20,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:20,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:20,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:15:20,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:20,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2121436352, now seen corresponding path program 1 times [2024-06-28 02:15:20,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:20,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618616089] [2024-06-28 02:15:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:20,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:20,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:20,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618616089] [2024-06-28 02:15:20,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618616089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:20,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:20,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:15:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616032319] [2024-06-28 02:15:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:20,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:15:20,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:15:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:15:20,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-06-28 02:15:20,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 02:15:20,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:20,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-06-28 02:15:20,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:21,121 INFO L124 PetriNetUnfolderBase]: 3692/6109 cut-off events. [2024-06-28 02:15:21,121 INFO L125 PetriNetUnfolderBase]: For 2993/3300 co-relation queries the response was YES. [2024-06-28 02:15:21,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14007 conditions, 6109 events. 3692/6109 cut-off events. For 2993/3300 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45242 event pairs, 3047 based on Foata normal form. 474/6236 useless extension candidates. Maximal degree in co-relation 7508. Up to 4720 conditions per place. [2024-06-28 02:15:21,150 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 34 selfloop transitions, 2 changer transitions 21/76 dead transitions. [2024-06-28 02:15:21,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 331 flow [2024-06-28 02:15:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:15:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:15:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2024-06-28 02:15:21,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6864406779661016 [2024-06-28 02:15:21,152 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 159 flow. Second operand 4 states and 162 transitions. [2024-06-28 02:15:21,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 331 flow [2024-06-28 02:15:21,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:15:21,155 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 168 flow [2024-06-28 02:15:21,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-06-28 02:15:21,155 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2024-06-28 02:15:21,156 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 168 flow [2024-06-28 02:15:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 02:15:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:21,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:15:21,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:21,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1985402528, now seen corresponding path program 1 times [2024-06-28 02:15:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690680579] [2024-06-28 02:15:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 02:15:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:21,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690680579] [2024-06-28 02:15:21,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690680579] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 02:15:21,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660754146] [2024-06-28 02:15:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 02:15:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:15:21,282 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 02:15:21,310 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 02:15:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:21,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 02:15:21,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 02:15:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 02:15:21,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 02:15:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 02:15:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660754146] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 02:15:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 02:15:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 15 [2024-06-28 02:15:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35964546] [2024-06-28 02:15:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:15:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:15:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-06-28 02:15:21,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-06-28 02:15:21,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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 02:15:21,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:21,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-06-28 02:15:21,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:23,085 INFO L124 PetriNetUnfolderBase]: 18213/25425 cut-off events. [2024-06-28 02:15:23,086 INFO L125 PetriNetUnfolderBase]: For 11678/11678 co-relation queries the response was YES. [2024-06-28 02:15:23,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61742 conditions, 25425 events. 18213/25425 cut-off events. For 11678/11678 co-relation queries the response was YES. Maximal size of possible extension queue 1315. Compared 168038 event pairs, 3418 based on Foata normal form. 0/23428 useless extension candidates. Maximal degree in co-relation 61725. Up to 6795 conditions per place. [2024-06-28 02:15:23,206 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 110 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2024-06-28 02:15:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 131 transitions, 675 flow [2024-06-28 02:15:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:15:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:15:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-06-28 02:15:23,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-06-28 02:15:23,208 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 168 flow. Second operand 6 states and 228 transitions. [2024-06-28 02:15:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 131 transitions, 675 flow [2024-06-28 02:15:23,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 131 transitions, 671 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 02:15:23,216 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 229 flow [2024-06-28 02:15:23,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2024-06-28 02:15:23,217 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2024-06-28 02:15:23,217 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 229 flow [2024-06-28 02:15:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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 02:15:23,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:23,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:23,237 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 02:15:23,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 02:15:23,434 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:23,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1755789428, now seen corresponding path program 2 times [2024-06-28 02:15:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902586057] [2024-06-28 02:15:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 02:15:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:23,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902586057] [2024-06-28 02:15:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902586057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:15:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231431593] [2024-06-28 02:15:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:23,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:15:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:15:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:15:23,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-06-28 02:15:23,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 02:15:23,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:23,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-06-28 02:15:23,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:25,502 INFO L124 PetriNetUnfolderBase]: 15419/22402 cut-off events. [2024-06-28 02:15:25,502 INFO L125 PetriNetUnfolderBase]: For 27890/28784 co-relation queries the response was YES. [2024-06-28 02:15:25,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65543 conditions, 22402 events. 15419/22402 cut-off events. For 27890/28784 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 155986 event pairs, 2152 based on Foata normal form. 861/23079 useless extension candidates. Maximal degree in co-relation 65518. Up to 13287 conditions per place. [2024-06-28 02:15:25,610 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 89 selfloop transitions, 12 changer transitions 0/120 dead transitions. [2024-06-28 02:15:25,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 684 flow [2024-06-28 02:15:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:15:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:15:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2024-06-28 02:15:25,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652542372881356 [2024-06-28 02:15:25,612 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 229 flow. Second operand 6 states and 231 transitions. [2024-06-28 02:15:25,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 684 flow [2024-06-28 02:15:25,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 677 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:15:25,650 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 353 flow [2024-06-28 02:15:25,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-06-28 02:15:25,651 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 17 predicate places. [2024-06-28 02:15:25,651 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 353 flow [2024-06-28 02:15:25,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 02:15:25,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:25,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:15:25,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:25,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2087850299, now seen corresponding path program 1 times [2024-06-28 02:15:25,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:25,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887045052] [2024-06-28 02:15:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:25,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887045052] [2024-06-28 02:15:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887045052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 02:15:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816759837] [2024-06-28 02:15:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 02:15:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:15:26,217 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 02:15:26,244 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 02:15:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:26,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 02:15:26,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 02:15:26,366 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 02:15:26,666 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 15 treesize of output 7 [2024-06-28 02:15:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:26,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 02:15:27,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-06-28 02:15:27,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 35 [2024-06-28 02:15:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:27,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816759837] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 02:15:27,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 02:15:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-06-28 02:15:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606244603] [2024-06-28 02:15:27,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 02:15:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-28 02:15:27,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-28 02:15:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-06-28 02:15:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-06-28 02:15:27,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 353 flow. Second operand has 18 states, 18 states have (on average 30.833333333333332) internal successors, (555), 18 states have internal predecessors, (555), 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 02:15:27,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:27,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-06-28 02:15:27,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:33,943 INFO L124 PetriNetUnfolderBase]: 43175/67070 cut-off events. [2024-06-28 02:15:33,943 INFO L125 PetriNetUnfolderBase]: For 135692/142340 co-relation queries the response was YES. [2024-06-28 02:15:34,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209116 conditions, 67070 events. 43175/67070 cut-off events. For 135692/142340 co-relation queries the response was YES. Maximal size of possible extension queue 3359. Compared 575827 event pairs, 2623 based on Foata normal form. 4334/69856 useless extension candidates. Maximal degree in co-relation 100057. Up to 21445 conditions per place. [2024-06-28 02:15:34,439 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 304 selfloop transitions, 55 changer transitions 4/389 dead transitions. [2024-06-28 02:15:34,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 389 transitions, 2468 flow [2024-06-28 02:15:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 02:15:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 02:15:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 819 transitions. [2024-06-28 02:15:34,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7305976806422837 [2024-06-28 02:15:34,442 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 353 flow. Second operand 19 states and 819 transitions. [2024-06-28 02:15:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 389 transitions, 2468 flow [2024-06-28 02:15:34,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 389 transitions, 2407 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 02:15:34,578 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 880 flow [2024-06-28 02:15:34,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=880, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-28 02:15:34,579 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 42 predicate places. [2024-06-28 02:15:34,579 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 880 flow [2024-06-28 02:15:34,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.833333333333332) internal successors, (555), 18 states have internal predecessors, (555), 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 02:15:34,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:34,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:34,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 02:15:34,790 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,SelfDestructingSolverStorable9 [2024-06-28 02:15:34,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:34,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash -777348775, now seen corresponding path program 1 times [2024-06-28 02:15:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:34,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636990499] [2024-06-28 02:15:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 02:15:35,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636990499] [2024-06-28 02:15:35,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636990499] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 02:15:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828290395] [2024-06-28 02:15:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 02:15:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:15:35,597 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 02:15:35,607 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 02:15:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:35,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-28 02:15:35,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 02:15:35,845 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 25 treesize of output 7 [2024-06-28 02:15:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 02:15:35,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 02:15:35,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 02:15:35,919 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 26 treesize of output 18 [2024-06-28 02:15:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 02:15:36,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828290395] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 02:15:36,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 02:15:36,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 14 [2024-06-28 02:15:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431644448] [2024-06-28 02:15:36,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 02:15:36,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 02:15:36,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 02:15:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-06-28 02:15:36,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-06-28 02:15:36,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 880 flow. Second operand has 15 states, 15 states have (on average 31.6) internal successors, (474), 15 states have internal predecessors, (474), 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 02:15:36,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:36,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-06-28 02:15:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:47,996 INFO L124 PetriNetUnfolderBase]: 65908/102516 cut-off events. [2024-06-28 02:15:47,997 INFO L125 PetriNetUnfolderBase]: For 288512/299251 co-relation queries the response was YES. [2024-06-28 02:15:48,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341799 conditions, 102516 events. 65908/102516 cut-off events. For 288512/299251 co-relation queries the response was YES. Maximal size of possible extension queue 4877. Compared 921820 event pairs, 3001 based on Foata normal form. 7717/108720 useless extension candidates. Maximal degree in co-relation 319328. Up to 31177 conditions per place. [2024-06-28 02:15:49,101 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 236 selfloop transitions, 97 changer transitions 2/361 dead transitions. [2024-06-28 02:15:49,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 361 transitions, 2696 flow [2024-06-28 02:15:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 02:15:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 02:15:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 708 transitions. [2024-06-28 02:15:49,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 02:15:49,104 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 880 flow. Second operand 18 states and 708 transitions. [2024-06-28 02:15:49,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 361 transitions, 2696 flow [2024-06-28 02:15:52,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 361 transitions, 2612 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-28 02:15:52,871 INFO L231 Difference]: Finished difference. Result has 126 places, 182 transitions, 1583 flow [2024-06-28 02:15:52,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1583, PETRI_PLACES=126, PETRI_TRANSITIONS=182} [2024-06-28 02:15:52,872 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 65 predicate places. [2024-06-28 02:15:52,872 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 182 transitions, 1583 flow [2024-06-28 02:15:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 31.6) internal successors, (474), 15 states have internal predecessors, (474), 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 02:15:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:52,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:52,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-28 02:15:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 02:15:53,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-28 02:15:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 510681090, now seen corresponding path program 1 times [2024-06-28 02:15:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:53,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018591051] [2024-06-28 02:15:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 02:15:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018591051] [2024-06-28 02:15:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018591051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:53,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:53,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:15:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763024909] [2024-06-28 02:15:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:53,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:15:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:15:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:15:53,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-06-28 02:15:53,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 182 transitions, 1583 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 02:15:53,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:53,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-06-28 02:15:53,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:16:06,222 INFO L124 PetriNetUnfolderBase]: 70464/109173 cut-off events. [2024-06-28 02:16:06,222 INFO L125 PetriNetUnfolderBase]: For 514048/522572 co-relation queries the response was YES. [2024-06-28 02:16:07,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407883 conditions, 109173 events. 70464/109173 cut-off events. For 514048/522572 co-relation queries the response was YES. Maximal size of possible extension queue 5017. Compared 985244 event pairs, 16301 based on Foata normal form. 5250/111801 useless extension candidates. Maximal degree in co-relation 383624. Up to 77943 conditions per place. [2024-06-28 02:16:07,701 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 222 selfloop transitions, 9 changer transitions 0/257 dead transitions. [2024-06-28 02:16:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 257 transitions, 2844 flow [2024-06-28 02:16:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:16:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:16:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-06-28 02:16:07,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.751412429378531 [2024-06-28 02:16:07,703 INFO L175 Difference]: Start difference. First operand has 126 places, 182 transitions, 1583 flow. Second operand 3 states and 133 transitions. [2024-06-28 02:16:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 257 transitions, 2844 flow