./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/safe029_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/pthread-wmm/safe029_tso.i ./goblint.2024-05-07_14-17-48.files/protection/safe029_tso.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-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:47:21,464 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:47:21,544 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:47:21,549 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:47:21,551 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:47:21,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:47:21,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:47:21,584 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:47:21,584 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:47:21,588 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:47:21,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:47:21,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:47:21,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:47:21,591 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:47:21,592 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:47:21,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:47:21,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:47:21,593 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:47:21,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:47:21,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:47:21,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:47:21,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:47:21,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:47:21,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:47:21,595 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:47:21,595 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:47:21,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:47:21,596 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:47:21,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:47:21,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:47:21,598 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:47:21,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:47:21,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:47:21,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:47:21,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:47:21,599 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:47:21,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:47:21,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:47:21,600 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:47:21,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:47:21,600 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:47:21,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:47:21,601 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:47:21,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:47:21,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:47:21,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:47:21,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:47:21,929 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:47:21,929 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:47:21,930 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_tso.i [2024-05-12 12:47:23,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:47:23,404 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:47:23,405 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i [2024-05-12 12:47:23,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa34c861/24d37fa4840e495798e7117b23e90855/FLAG6f31cbf8d [2024-05-12 12:47:23,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/daa34c861/24d37fa4840e495798e7117b23e90855 [2024-05-12 12:47:23,438 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:47:23,439 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:47:23,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/safe029_tso.yml/witness.yml [2024-05-12 12:47:23,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:47:23,543 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:47:23,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:47:23,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:47:23,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:47:23,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:47:23" (1/2) ... [2024-05-12 12:47:23,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455057d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:23, skipping insertion in model container [2024-05-12 12:47:23,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:47:23" (1/2) ... [2024-05-12 12:47:23,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46c9b675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:47:23, skipping insertion in model container [2024-05-12 12:47:23,555 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:23" (2/2) ... [2024-05-12 12:47:23,555 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455057d5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:23, skipping insertion in model container [2024-05-12 12:47:23,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:23" (2/2) ... [2024-05-12 12:47:23,556 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:47:23,590 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:47:23,591 INFO L97 edCorrectnessWitness]: Location invariant before [L759-L759] ((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 12:47:23,591 INFO L97 edCorrectnessWitness]: Location invariant before [L760-L760] ((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-05-12 12:47:23,592 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:47:23,592 INFO L106 edCorrectnessWitness]: ghost_update [L757-L757] multithreaded = 1; [2024-05-12 12:47:23,641 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:47:23,805 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i[945,958] [2024-05-12 12:47:23,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:47:23,996 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 12:47:24,028 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:47:24,078 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:47:24,111 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:47:24,111 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24 WrapperNode [2024-05-12 12:47:24,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:47:24,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:47:24,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:47:24,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:47:24,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,158 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-05-12 12:47:24,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:47:24,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:47:24,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:47:24,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:47:24,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,170 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,182 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 12:47:24,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:47:24,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:47:24,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:47:24,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:47:24,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (1/1) ... [2024-05-12 12:47:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:47:24,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:47:24,238 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) [2024-05-12 12:47:24,239 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 [2024-05-12 12:47:24,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:47:24,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:47:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 12:47:24,267 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 12:47:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 12:47:24,267 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 12:47:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:47:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:47:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:47:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:47:24,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:47:24,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:47:24,269 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:47:24,378 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:47:24,380 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:47:24,518 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:47:24,518 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:47:24,589 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:47:24,589 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 12:47:24,590 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:47:24 BoogieIcfgContainer [2024-05-12 12:47:24,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:47:24,592 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:47:24,592 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:47:24,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:47:24,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:47:23" (1/4) ... [2024-05-12 12:47:24,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19446f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:47:24, skipping insertion in model container [2024-05-12 12:47:24,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:47:23" (2/4) ... [2024-05-12 12:47:24,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19446f72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:47:24, skipping insertion in model container [2024-05-12 12:47:24,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:47:24" (3/4) ... [2024-05-12 12:47:24,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19446f72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:47:24, skipping insertion in model container [2024-05-12 12:47:24,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:47:24" (4/4) ... [2024-05-12 12:47:24,598 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_tso.i [2024-05-12 12:47:24,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:47:24,634 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:47:24,634 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:47:24,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:47:24,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 12:47:24,788 INFO L124 PetriNetUnfolderBase]: 1/33 cut-off events. [2024-05-12 12:47:24,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:47:24,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 33 events. 1/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-05-12 12:47:24,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 78 flow [2024-05-12 12:47:24,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 30 transitions, 66 flow [2024-05-12 12:47:24,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:47:24,836 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;@2d3a8118, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:47:24,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:47:24,849 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:47:24,850 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 12:47:24,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:47:24,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:24,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:47:24,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:24,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1401693771, now seen corresponding path program 1 times [2024-05-12 12:47:24,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849939917] [2024-05-12 12:47:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:25,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:25,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849939917] [2024-05-12 12:47:25,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849939917] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:25,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:25,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:47:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782294711] [2024-05-12 12:47:25,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:25,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:47:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:47:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:47:25,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:25,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-05-12 12:47:25,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:25,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:25,525 INFO L124 PetriNetUnfolderBase]: 189/374 cut-off events. [2024-05-12 12:47:25,526 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 12:47:25,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 374 events. 189/374 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1798 event pairs, 129 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 711. Up to 326 conditions per place. [2024-05-12 12:47:25,533 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 25 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-05-12 12:47:25,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 141 flow [2024-05-12 12:47:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:47:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:47:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-05-12 12:47:25,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-05-12 12:47:25,548 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 66 flow. Second operand 3 states and 69 transitions. [2024-05-12 12:47:25,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 141 flow [2024-05-12 12:47:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:25,554 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 85 flow [2024-05-12 12:47:25,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-05-12 12:47:25,560 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-05-12 12:47:25,561 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 85 flow [2024-05-12 12:47:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 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) [2024-05-12 12:47:25,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:25,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:47:25,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:25,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1591691754, now seen corresponding path program 1 times [2024-05-12 12:47:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:25,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395231071] [2024-05-12 12:47:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:25,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395231071] [2024-05-12 12:47:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395231071] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:25,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:47:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238374033] [2024-05-12 12:47:25,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:25,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:25,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:25,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:25,947 INFO L124 PetriNetUnfolderBase]: 186/390 cut-off events. [2024-05-12 12:47:25,948 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-05-12 12:47:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 390 events. 186/390 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1824 event pairs, 79 based on Foata normal form. 2/384 useless extension candidates. Maximal degree in co-relation 809. Up to 308 conditions per place. [2024-05-12 12:47:25,953 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 31 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-05-12 12:47:25,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 191 flow [2024-05-12 12:47:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-05-12 12:47:25,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 12:47:25,955 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 85 flow. Second operand 4 states and 90 transitions. [2024-05-12 12:47:25,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 191 flow [2024-05-12 12:47:25,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:25,958 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 109 flow [2024-05-12 12:47:25,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-05-12 12:47:25,959 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-05-12 12:47:25,959 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 109 flow [2024-05-12 12:47:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:25,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:25,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:25,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:47:25,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:25,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:25,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2106740202, now seen corresponding path program 1 times [2024-05-12 12:47:25,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:25,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269393420] [2024-05-12 12:47:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:25,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269393420] [2024-05-12 12:47:26,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269393420] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798237130] [2024-05-12 12:47:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:26,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:26,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:26,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:26,208 INFO L124 PetriNetUnfolderBase]: 208/433 cut-off events. [2024-05-12 12:47:26,209 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-05-12 12:47:26,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 433 events. 208/433 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2124 event pairs, 42 based on Foata normal form. 4/429 useless extension candidates. Maximal degree in co-relation 971. Up to 239 conditions per place. [2024-05-12 12:47:26,215 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 43 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-05-12 12:47:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 313 flow [2024-05-12 12:47:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-05-12 12:47:26,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6971428571428572 [2024-05-12 12:47:26,222 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 109 flow. Second operand 5 states and 122 transitions. [2024-05-12 12:47:26,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 313 flow [2024-05-12 12:47:26,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 67 transitions, 304 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:26,227 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 197 flow [2024-05-12 12:47:26,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-05-12 12:47:26,229 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2024-05-12 12:47:26,229 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 197 flow [2024-05-12 12:47:26,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:26,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:26,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:26,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:47:26,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1647697771, now seen corresponding path program 1 times [2024-05-12 12:47:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782607173] [2024-05-12 12:47:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782607173] [2024-05-12 12:47:26,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782607173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:26,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876045955] [2024-05-12 12:47:26,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:26,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:26,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:26,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:26,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 12:47:26,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:26,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:26,613 INFO L124 PetriNetUnfolderBase]: 249/511 cut-off events. [2024-05-12 12:47:26,613 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-05-12 12:47:26,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 511 events. 249/511 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2689 event pairs, 29 based on Foata normal form. 14/518 useless extension candidates. Maximal degree in co-relation 1459. Up to 200 conditions per place. [2024-05-12 12:47:26,618 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 48 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-05-12 12:47:26,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 411 flow [2024-05-12 12:47:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-05-12 12:47:26,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-05-12 12:47:26,620 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 197 flow. Second operand 6 states and 142 transitions. [2024-05-12 12:47:26,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 411 flow [2024-05-12 12:47:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 407 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 12:47:26,628 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 231 flow [2024-05-12 12:47:26,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=231, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-05-12 12:47:26,630 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2024-05-12 12:47:26,630 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 231 flow [2024-05-12 12:47:26,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-05-12 12:47:26,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:26,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:26,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:47:26,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:26,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1744188116, now seen corresponding path program 1 times [2024-05-12 12:47:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:26,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086769367] [2024-05-12 12:47:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086769367] [2024-05-12 12:47:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086769367] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:47:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433485917] [2024-05-12 12:47:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:26,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:26,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 12:47:26,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:26,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:26,848 INFO L124 PetriNetUnfolderBase]: 247/496 cut-off events. [2024-05-12 12:47:26,848 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-05-12 12:47:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 496 events. 247/496 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2572 event pairs, 45 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 1599. Up to 433 conditions per place. [2024-05-12 12:47:26,854 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-05-12 12:47:26,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 361 flow [2024-05-12 12:47:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-05-12 12:47:26,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-05-12 12:47:26,856 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 231 flow. Second operand 4 states and 85 transitions. [2024-05-12 12:47:26,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 361 flow [2024-05-12 12:47:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 321 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:26,860 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 228 flow [2024-05-12 12:47:26,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-05-12 12:47:26,862 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2024-05-12 12:47:26,862 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 228 flow [2024-05-12 12:47:26,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-05-12 12:47:26,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:26,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:26,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:47:26,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:26,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:26,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1793370640, now seen corresponding path program 1 times [2024-05-12 12:47:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851198374] [2024-05-12 12:47:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:26,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:26,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851198374] [2024-05-12 12:47:26,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851198374] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:26,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:26,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:26,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764309876] [2024-05-12 12:47:26,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:26,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:26,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:26,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:26,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:26,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:26,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:26,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:26,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:26,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,100 INFO L124 PetriNetUnfolderBase]: 252/531 cut-off events. [2024-05-12 12:47:27,101 INFO L125 PetriNetUnfolderBase]: For 702/705 co-relation queries the response was YES. [2024-05-12 12:47:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1589 conditions, 531 events. 252/531 cut-off events. For 702/705 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2901 event pairs, 58 based on Foata normal form. 3/526 useless extension candidates. Maximal degree in co-relation 1565. Up to 335 conditions per place. [2024-05-12 12:47:27,105 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 37 selfloop transitions, 17 changer transitions 0/64 dead transitions. [2024-05-12 12:47:27,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 402 flow [2024-05-12 12:47:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:27,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-05-12 12:47:27,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6514285714285715 [2024-05-12 12:47:27,107 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 228 flow. Second operand 5 states and 114 transitions. [2024-05-12 12:47:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 402 flow [2024-05-12 12:47:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 387 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:27,111 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 273 flow [2024-05-12 12:47:27,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-05-12 12:47:27,112 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2024-05-12 12:47:27,112 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 273 flow [2024-05-12 12:47:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:27,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:47:27,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:27,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash 117773393, now seen corresponding path program 1 times [2024-05-12 12:47:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781014024] [2024-05-12 12:47:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781014024] [2024-05-12 12:47:27,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781014024] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363693106] [2024-05-12 12:47:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:27,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:27,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:27,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:27,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:27,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:27,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,327 INFO L124 PetriNetUnfolderBase]: 256/544 cut-off events. [2024-05-12 12:47:27,327 INFO L125 PetriNetUnfolderBase]: For 945/945 co-relation queries the response was YES. [2024-05-12 12:47:27,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 544 events. 256/544 cut-off events. For 945/945 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2998 event pairs, 53 based on Foata normal form. 2/537 useless extension candidates. Maximal degree in co-relation 1723. Up to 332 conditions per place. [2024-05-12 12:47:27,332 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 41 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2024-05-12 12:47:27,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 472 flow [2024-05-12 12:47:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-05-12 12:47:27,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6628571428571428 [2024-05-12 12:47:27,334 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 273 flow. Second operand 5 states and 116 transitions. [2024-05-12 12:47:27,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 472 flow [2024-05-12 12:47:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 455 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:47:27,338 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 320 flow [2024-05-12 12:47:27,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2024-05-12 12:47:27,339 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-05-12 12:47:27,339 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 320 flow [2024-05-12 12:47:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:27,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:47:27,340 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1128272545, now seen corresponding path program 2 times [2024-05-12 12:47:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188141719] [2024-05-12 12:47:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188141719] [2024-05-12 12:47:27,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188141719] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:27,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141293692] [2024-05-12 12:47:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:27,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:27,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:27,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:27,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:27,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,557 INFO L124 PetriNetUnfolderBase]: 246/514 cut-off events. [2024-05-12 12:47:27,558 INFO L125 PetriNetUnfolderBase]: For 1302/1305 co-relation queries the response was YES. [2024-05-12 12:47:27,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 514 events. 246/514 cut-off events. For 1302/1305 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2727 event pairs, 59 based on Foata normal form. 2/505 useless extension candidates. Maximal degree in co-relation 1680. Up to 314 conditions per place. [2024-05-12 12:47:27,562 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 37 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2024-05-12 12:47:27,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 472 flow [2024-05-12 12:47:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-05-12 12:47:27,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-05-12 12:47:27,564 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 320 flow. Second operand 5 states and 112 transitions. [2024-05-12 12:47:27,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 472 flow [2024-05-12 12:47:27,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 448 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:27,569 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 339 flow [2024-05-12 12:47:27,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-05-12 12:47:27,570 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-05-12 12:47:27,570 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 339 flow [2024-05-12 12:47:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 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) [2024-05-12 12:47:27,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:47:27,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:27,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1147272657, now seen corresponding path program 1 times [2024-05-12 12:47:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834554779] [2024-05-12 12:47:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834554779] [2024-05-12 12:47:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834554779] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:27,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952376214] [2024-05-12 12:47:27,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 12:47:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:27,825 INFO L124 PetriNetUnfolderBase]: 285/579 cut-off events. [2024-05-12 12:47:27,825 INFO L125 PetriNetUnfolderBase]: For 1791/1794 co-relation queries the response was YES. [2024-05-12 12:47:27,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 579 events. 285/579 cut-off events. For 1791/1794 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3166 event pairs, 64 based on Foata normal form. 12/582 useless extension candidates. Maximal degree in co-relation 1885. Up to 291 conditions per place. [2024-05-12 12:47:27,830 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 42 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-05-12 12:47:27,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 535 flow [2024-05-12 12:47:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 12:47:27,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-05-12 12:47:27,832 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 339 flow. Second operand 6 states and 134 transitions. [2024-05-12 12:47:27,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 535 flow [2024-05-12 12:47:27,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 469 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:27,838 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 331 flow [2024-05-12 12:47:27,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-05-12 12:47:27,839 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-05-12 12:47:27,839 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 331 flow [2024-05-12 12:47:27,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-05-12 12:47:27,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:27,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:47:27,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:27,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1895614121, now seen corresponding path program 1 times [2024-05-12 12:47:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620070525] [2024-05-12 12:47:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:27,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620070525] [2024-05-12 12:47:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620070525] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:27,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:27,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971485632] [2024-05-12 12:47:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:27,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:27,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 331 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:27,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:27,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,069 INFO L124 PetriNetUnfolderBase]: 292/611 cut-off events. [2024-05-12 12:47:28,069 INFO L125 PetriNetUnfolderBase]: For 1456/1459 co-relation queries the response was YES. [2024-05-12 12:47:28,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 611 events. 292/611 cut-off events. For 1456/1459 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3492 event pairs, 78 based on Foata normal form. 3/602 useless extension candidates. Maximal degree in co-relation 1961. Up to 399 conditions per place. [2024-05-12 12:47:28,075 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 44 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-05-12 12:47:28,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 523 flow [2024-05-12 12:47:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-05-12 12:47:28,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6457142857142857 [2024-05-12 12:47:28,077 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 331 flow. Second operand 5 states and 113 transitions. [2024-05-12 12:47:28,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 523 flow [2024-05-12 12:47:28,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 71 transitions, 458 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:28,083 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 321 flow [2024-05-12 12:47:28,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-05-12 12:47:28,086 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2024-05-12 12:47:28,086 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 321 flow [2024-05-12 12:47:28,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:28,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:28,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:47:28,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1896386951, now seen corresponding path program 2 times [2024-05-12 12:47:28,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:28,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243582521] [2024-05-12 12:47:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243582521] [2024-05-12 12:47:28,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243582521] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483440087] [2024-05-12 12:47:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:28,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:28,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:28,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:28,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:28,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,282 INFO L124 PetriNetUnfolderBase]: 290/605 cut-off events. [2024-05-12 12:47:28,283 INFO L125 PetriNetUnfolderBase]: For 1430/1433 co-relation queries the response was YES. [2024-05-12 12:47:28,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 605 events. 290/605 cut-off events. For 1430/1433 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3426 event pairs, 81 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 1853. Up to 397 conditions per place. [2024-05-12 12:47:28,288 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 40 selfloop transitions, 17 changer transitions 0/67 dead transitions. [2024-05-12 12:47:28,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 461 flow [2024-05-12 12:47:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-05-12 12:47:28,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-05-12 12:47:28,290 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 321 flow. Second operand 5 states and 109 transitions. [2024-05-12 12:47:28,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 461 flow [2024-05-12 12:47:28,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 427 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:28,295 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 326 flow [2024-05-12 12:47:28,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=326, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-05-12 12:47:28,296 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 26 predicate places. [2024-05-12 12:47:28,296 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 326 flow [2024-05-12 12:47:28,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:28,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:28,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:28,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:47:28,297 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:28,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:28,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1196110442, now seen corresponding path program 1 times [2024-05-12 12:47:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:28,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175673050] [2024-05-12 12:47:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175673050] [2024-05-12 12:47:28,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175673050] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743355265] [2024-05-12 12:47:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:28,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:28,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:28,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:28,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:28,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:28,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,569 INFO L124 PetriNetUnfolderBase]: 342/716 cut-off events. [2024-05-12 12:47:28,570 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-05-12 12:47:28,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 716 events. 342/716 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4314 event pairs, 74 based on Foata normal form. 2/707 useless extension candidates. Maximal degree in co-relation 2262. Up to 264 conditions per place. [2024-05-12 12:47:28,577 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 50 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-05-12 12:47:28,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 566 flow [2024-05-12 12:47:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-05-12 12:47:28,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 12:47:28,579 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 326 flow. Second operand 6 states and 135 transitions. [2024-05-12 12:47:28,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 566 flow [2024-05-12 12:47:28,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 81 transitions, 512 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:28,586 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 328 flow [2024-05-12 12:47:28,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-05-12 12:47:28,588 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2024-05-12 12:47:28,588 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 328 flow [2024-05-12 12:47:28,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:28,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:28,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:47:28,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:28,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash -846924118, now seen corresponding path program 2 times [2024-05-12 12:47:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:28,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277642629] [2024-05-12 12:47:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277642629] [2024-05-12 12:47:28,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277642629] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:28,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214023462] [2024-05-12 12:47:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:28,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:28,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:28,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:28,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:28,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:28,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:28,847 INFO L124 PetriNetUnfolderBase]: 339/711 cut-off events. [2024-05-12 12:47:28,847 INFO L125 PetriNetUnfolderBase]: For 2133/2133 co-relation queries the response was YES. [2024-05-12 12:47:28,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 711 events. 339/711 cut-off events. For 2133/2133 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4255 event pairs, 88 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 2248. Up to 478 conditions per place. [2024-05-12 12:47:28,853 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2024-05-12 12:47:28,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 500 flow [2024-05-12 12:47:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-05-12 12:47:28,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-05-12 12:47:28,855 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 328 flow. Second operand 6 states and 132 transitions. [2024-05-12 12:47:28,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 500 flow [2024-05-12 12:47:28,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 459 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 12:47:28,863 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 333 flow [2024-05-12 12:47:28,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-05-12 12:47:28,864 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-05-12 12:47:28,865 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 333 flow [2024-05-12 12:47:28,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:28,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:28,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:28,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:47:28,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:28,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash 185001388, now seen corresponding path program 1 times [2024-05-12 12:47:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:28,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516172136] [2024-05-12 12:47:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516172136] [2024-05-12 12:47:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516172136] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:28,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862695225] [2024-05-12 12:47:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:28,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:28,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:29,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:29,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 333 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:29,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:29,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:29,127 INFO L124 PetriNetUnfolderBase]: 336/709 cut-off events. [2024-05-12 12:47:29,127 INFO L125 PetriNetUnfolderBase]: For 2375/2378 co-relation queries the response was YES. [2024-05-12 12:47:29,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 709 events. 336/709 cut-off events. For 2375/2378 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4281 event pairs, 87 based on Foata normal form. 2/698 useless extension candidates. Maximal degree in co-relation 2224. Up to 473 conditions per place. [2024-05-12 12:47:29,134 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 42 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-05-12 12:47:29,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 503 flow [2024-05-12 12:47:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-05-12 12:47:29,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-05-12 12:47:29,135 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 333 flow. Second operand 6 states and 129 transitions. [2024-05-12 12:47:29,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 503 flow [2024-05-12 12:47:29,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 448 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:29,143 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 336 flow [2024-05-12 12:47:29,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2024-05-12 12:47:29,144 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 31 predicate places. [2024-05-12 12:47:29,144 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 336 flow [2024-05-12 12:47:29,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:29,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:47:29,145 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:29,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1047612544, now seen corresponding path program 2 times [2024-05-12 12:47:29,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124384080] [2024-05-12 12:47:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:29,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:29,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124384080] [2024-05-12 12:47:29,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124384080] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:29,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:29,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:29,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721584400] [2024-05-12 12:47:29,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:29,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:29,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:29,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:29,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:29,390 INFO L124 PetriNetUnfolderBase]: 333/686 cut-off events. [2024-05-12 12:47:29,391 INFO L125 PetriNetUnfolderBase]: For 2275/2278 co-relation queries the response was YES. [2024-05-12 12:47:29,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2165 conditions, 686 events. 333/686 cut-off events. For 2275/2278 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4046 event pairs, 84 based on Foata normal form. 2/678 useless extension candidates. Maximal degree in co-relation 2134. Up to 269 conditions per place. [2024-05-12 12:47:29,397 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 47 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2024-05-12 12:47:29,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 548 flow [2024-05-12 12:47:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-05-12 12:47:29,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-05-12 12:47:29,399 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 336 flow. Second operand 6 states and 132 transitions. [2024-05-12 12:47:29,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 548 flow [2024-05-12 12:47:29,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 500 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:29,410 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 334 flow [2024-05-12 12:47:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2024-05-12 12:47:29,410 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2024-05-12 12:47:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 334 flow [2024-05-12 12:47:29,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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) [2024-05-12 12:47:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:47:29,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:29,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1583707929, now seen corresponding path program 1 times [2024-05-12 12:47:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156429782] [2024-05-12 12:47:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156429782] [2024-05-12 12:47:29,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156429782] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:29,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:29,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:47:29,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116024782] [2024-05-12 12:47:29,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:29,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:47:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:47:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:47:29,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 12:47:29,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 12:47:29,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 12:47:29,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:29,638 INFO L124 PetriNetUnfolderBase]: 232/673 cut-off events. [2024-05-12 12:47:29,639 INFO L125 PetriNetUnfolderBase]: For 672/675 co-relation queries the response was YES. [2024-05-12 12:47:29,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 673 events. 232/673 cut-off events. For 672/675 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4467 event pairs, 24 based on Foata normal form. 40/675 useless extension candidates. Maximal degree in co-relation 1535. Up to 238 conditions per place. [2024-05-12 12:47:29,643 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 22 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2024-05-12 12:47:29,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 426 flow [2024-05-12 12:47:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:47:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:47:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-05-12 12:47:29,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-05-12 12:47:29,645 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 334 flow. Second operand 4 states and 100 transitions. [2024-05-12 12:47:29,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 426 flow [2024-05-12 12:47:29,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 365 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 12:47:29,650 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 327 flow [2024-05-12 12:47:29,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=327, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-05-12 12:47:29,651 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2024-05-12 12:47:29,651 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 327 flow [2024-05-12 12:47:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-05-12 12:47:29,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:47:29,652 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:29,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1457605136, now seen corresponding path program 1 times [2024-05-12 12:47:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372769849] [2024-05-12 12:47:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:29,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372769849] [2024-05-12 12:47:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372769849] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:29,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518300135] [2024-05-12 12:47:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:29,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:29,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:29,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:29,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:29,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:29,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:29,904 INFO L124 PetriNetUnfolderBase]: 295/686 cut-off events. [2024-05-12 12:47:29,904 INFO L125 PetriNetUnfolderBase]: For 2230/2237 co-relation queries the response was YES. [2024-05-12 12:47:29,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 686 events. 295/686 cut-off events. For 2230/2237 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4215 event pairs, 123 based on Foata normal form. 8/651 useless extension candidates. Maximal degree in co-relation 1972. Up to 296 conditions per place. [2024-05-12 12:47:29,909 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 44 selfloop transitions, 21 changer transitions 0/76 dead transitions. [2024-05-12 12:47:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 509 flow [2024-05-12 12:47:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-05-12 12:47:29,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-05-12 12:47:29,911 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 327 flow. Second operand 6 states and 128 transitions. [2024-05-12 12:47:29,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 509 flow [2024-05-12 12:47:29,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 496 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:47:29,925 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 359 flow [2024-05-12 12:47:29,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-05-12 12:47:29,926 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 37 predicate places. [2024-05-12 12:47:29,926 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 359 flow [2024-05-12 12:47:29,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:29,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:29,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:29,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:47:29,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:29,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash 998369200, now seen corresponding path program 2 times [2024-05-12 12:47:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:29,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891153990] [2024-05-12 12:47:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:29,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:30,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891153990] [2024-05-12 12:47:30,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891153990] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:30,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:30,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:30,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613802660] [2024-05-12 12:47:30,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:30,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:30,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:30,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:30,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 359 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:30,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:30,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:30,183 INFO L124 PetriNetUnfolderBase]: 318/750 cut-off events. [2024-05-12 12:47:30,183 INFO L125 PetriNetUnfolderBase]: For 2532/2545 co-relation queries the response was YES. [2024-05-12 12:47:30,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 750 events. 318/750 cut-off events. For 2532/2545 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4790 event pairs, 149 based on Foata normal form. 8/710 useless extension candidates. Maximal degree in co-relation 2206. Up to 484 conditions per place. [2024-05-12 12:47:30,188 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 48 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-05-12 12:47:30,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 521 flow [2024-05-12 12:47:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-05-12 12:47:30,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 12:47:30,190 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 359 flow. Second operand 6 states and 119 transitions. [2024-05-12 12:47:30,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 521 flow [2024-05-12 12:47:30,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 480 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:30,196 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 347 flow [2024-05-12 12:47:30,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-05-12 12:47:30,197 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2024-05-12 12:47:30,197 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 347 flow [2024-05-12 12:47:30,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:30,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:47:30,198 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:30,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1367215922, now seen corresponding path program 3 times [2024-05-12 12:47:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:30,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725439081] [2024-05-12 12:47:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:30,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:30,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:30,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725439081] [2024-05-12 12:47:30,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725439081] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:30,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:30,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592220373] [2024-05-12 12:47:30,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:30,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:30,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 347 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:30,456 INFO L124 PetriNetUnfolderBase]: 371/885 cut-off events. [2024-05-12 12:47:30,457 INFO L125 PetriNetUnfolderBase]: For 3685/3699 co-relation queries the response was YES. [2024-05-12 12:47:30,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2628 conditions, 885 events. 371/885 cut-off events. For 3685/3699 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6001 event pairs, 168 based on Foata normal form. 14/849 useless extension candidates. Maximal degree in co-relation 2593. Up to 401 conditions per place. [2024-05-12 12:47:30,464 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 51 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2024-05-12 12:47:30,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 581 flow [2024-05-12 12:47:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:47:30,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-05-12 12:47:30,465 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 347 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:47:30,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 581 flow [2024-05-12 12:47:30,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 556 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:30,474 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 361 flow [2024-05-12 12:47:30,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-05-12 12:47:30,475 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-05-12 12:47:30,475 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 361 flow [2024-05-12 12:47:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:30,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:47:30,476 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:30,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1367068052, now seen corresponding path program 4 times [2024-05-12 12:47:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563806297] [2024-05-12 12:47:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:30,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:30,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563806297] [2024-05-12 12:47:30,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563806297] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:30,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:30,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:30,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395449156] [2024-05-12 12:47:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:30,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:30,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:30,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:30,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:30,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:30,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:30,750 INFO L124 PetriNetUnfolderBase]: 405/969 cut-off events. [2024-05-12 12:47:30,751 INFO L125 PetriNetUnfolderBase]: For 4451/4465 co-relation queries the response was YES. [2024-05-12 12:47:30,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 969 events. 405/969 cut-off events. For 4451/4465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6817 event pairs, 253 based on Foata normal form. 16/925 useless extension candidates. Maximal degree in co-relation 2828. Up to 682 conditions per place. [2024-05-12 12:47:30,758 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 46 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-05-12 12:47:30,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 74 transitions, 531 flow [2024-05-12 12:47:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-05-12 12:47:30,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 12:47:30,760 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 361 flow. Second operand 6 states and 126 transitions. [2024-05-12 12:47:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 74 transitions, 531 flow [2024-05-12 12:47:30,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 496 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:30,769 INFO L231 Difference]: Finished difference. Result has 80 places, 58 transitions, 364 flow [2024-05-12 12:47:30,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=80, PETRI_TRANSITIONS=58} [2024-05-12 12:47:30,770 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2024-05-12 12:47:30,770 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 58 transitions, 364 flow [2024-05-12 12:47:30,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:30,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:30,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:47:30,771 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:30,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1361705672, now seen corresponding path program 5 times [2024-05-12 12:47:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:30,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914515815] [2024-05-12 12:47:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914515815] [2024-05-12 12:47:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914515815] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734391883] [2024-05-12 12:47:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:30,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:30,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:30,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:30,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:30,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 58 transitions, 364 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:30,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:30,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:30,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:31,022 INFO L124 PetriNetUnfolderBase]: 395/950 cut-off events. [2024-05-12 12:47:31,022 INFO L125 PetriNetUnfolderBase]: For 3342/3355 co-relation queries the response was YES. [2024-05-12 12:47:31,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 950 events. 395/950 cut-off events. For 3342/3355 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6667 event pairs, 248 based on Foata normal form. 13/901 useless extension candidates. Maximal degree in co-relation 2641. Up to 664 conditions per place. [2024-05-12 12:47:31,032 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 43 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-05-12 12:47:31,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 71 transitions, 520 flow [2024-05-12 12:47:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-05-12 12:47:31,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-05-12 12:47:31,034 INFO L175 Difference]: Start difference. First operand has 80 places, 58 transitions, 364 flow. Second operand 6 states and 123 transitions. [2024-05-12 12:47:31,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 71 transitions, 520 flow [2024-05-12 12:47:31,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 71 transitions, 488 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:31,043 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 370 flow [2024-05-12 12:47:31,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2024-05-12 12:47:31,044 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2024-05-12 12:47:31,044 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 370 flow [2024-05-12 12:47:31,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:31,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:31,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:47:31,045 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:31,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1361490470, now seen corresponding path program 1 times [2024-05-12 12:47:31,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:31,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739189076] [2024-05-12 12:47:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739189076] [2024-05-12 12:47:31,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739189076] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:31,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:31,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324141697] [2024-05-12 12:47:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:31,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:31,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:31,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 370 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:31,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:31,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:31,323 INFO L124 PetriNetUnfolderBase]: 418/1021 cut-off events. [2024-05-12 12:47:31,323 INFO L125 PetriNetUnfolderBase]: For 3229/3242 co-relation queries the response was YES. [2024-05-12 12:47:31,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1021 events. 418/1021 cut-off events. For 3229/3242 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7401 event pairs, 239 based on Foata normal form. 11/971 useless extension candidates. Maximal degree in co-relation 2796. Up to 466 conditions per place. [2024-05-12 12:47:31,329 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 47 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-05-12 12:47:31,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 552 flow [2024-05-12 12:47:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-05-12 12:47:31,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-05-12 12:47:31,332 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 370 flow. Second operand 6 states and 127 transitions. [2024-05-12 12:47:31,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 552 flow [2024-05-12 12:47:31,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 520 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:31,341 INFO L231 Difference]: Finished difference. Result has 84 places, 58 transitions, 377 flow [2024-05-12 12:47:31,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=84, PETRI_TRANSITIONS=58} [2024-05-12 12:47:31,341 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 47 predicate places. [2024-05-12 12:47:31,341 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 58 transitions, 377 flow [2024-05-12 12:47:31,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:31,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:31,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:47:31,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:31,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash 883605646, now seen corresponding path program 2 times [2024-05-12 12:47:31,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:31,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57380723] [2024-05-12 12:47:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:31,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:31,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:31,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57380723] [2024-05-12 12:47:31,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57380723] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:31,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075313869] [2024-05-12 12:47:31,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:31,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:31,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:31,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:31,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 58 transitions, 377 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:31,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:31,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:31,622 INFO L124 PetriNetUnfolderBase]: 441/1073 cut-off events. [2024-05-12 12:47:31,622 INFO L125 PetriNetUnfolderBase]: For 3570/3575 co-relation queries the response was YES. [2024-05-12 12:47:31,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 1073 events. 441/1073 cut-off events. For 3570/3575 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7899 event pairs, 185 based on Foata normal form. 7/1024 useless extension candidates. Maximal degree in co-relation 2953. Up to 618 conditions per place. [2024-05-12 12:47:31,636 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 47 selfloop transitions, 21 changer transitions 0/79 dead transitions. [2024-05-12 12:47:31,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 573 flow [2024-05-12 12:47:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-05-12 12:47:31,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-05-12 12:47:31,639 INFO L175 Difference]: Start difference. First operand has 84 places, 58 transitions, 377 flow. Second operand 6 states and 131 transitions. [2024-05-12 12:47:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 573 flow [2024-05-12 12:47:31,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 538 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:31,653 INFO L231 Difference]: Finished difference. Result has 86 places, 58 transitions, 387 flow [2024-05-12 12:47:31,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2024-05-12 12:47:31,653 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 49 predicate places. [2024-05-12 12:47:31,654 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 387 flow [2024-05-12 12:47:31,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:31,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 12:47:31,655 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:31,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1705773628, now seen corresponding path program 3 times [2024-05-12 12:47:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541972876] [2024-05-12 12:47:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:31,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541972876] [2024-05-12 12:47:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541972876] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:31,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:31,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:31,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056255565] [2024-05-12 12:47:31,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:47:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:47:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:47:31,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-05-12 12:47:31,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:31,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-05-12 12:47:31,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:31,945 INFO L124 PetriNetUnfolderBase]: 434/1063 cut-off events. [2024-05-12 12:47:31,945 INFO L125 PetriNetUnfolderBase]: For 2417/2430 co-relation queries the response was YES. [2024-05-12 12:47:31,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 1063 events. 434/1063 cut-off events. For 2417/2430 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7853 event pairs, 264 based on Foata normal form. 8/1008 useless extension candidates. Maximal degree in co-relation 2837. Up to 752 conditions per place. [2024-05-12 12:47:31,953 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 47 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-05-12 12:47:31,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 501 flow [2024-05-12 12:47:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:47:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:47:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-05-12 12:47:31,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-05-12 12:47:31,956 INFO L175 Difference]: Start difference. First operand has 86 places, 58 transitions, 387 flow. Second operand 6 states and 118 transitions. [2024-05-12 12:47:31,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 501 flow [2024-05-12 12:47:31,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 396 flow, removed 0 selfloop flow, removed 26 redundant places. [2024-05-12 12:47:31,961 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 262 flow [2024-05-12 12:47:31,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-05-12 12:47:31,962 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2024-05-12 12:47:31,962 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 262 flow [2024-05-12 12:47:31,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:31,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:31,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 12:47:31,964 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:31,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash 434572527, now seen corresponding path program 1 times [2024-05-12 12:47:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:31,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74805746] [2024-05-12 12:47:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:31,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74805746] [2024-05-12 12:47:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74805746] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:32,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:32,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:47:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698994893] [2024-05-12 12:47:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:32,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:32,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2024-05-12 12:47:32,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:32,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:32,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2024-05-12 12:47:32,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:32,199 INFO L124 PetriNetUnfolderBase]: 322/956 cut-off events. [2024-05-12 12:47:32,200 INFO L125 PetriNetUnfolderBase]: For 530/569 co-relation queries the response was YES. [2024-05-12 12:47:32,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 956 events. 322/956 cut-off events. For 530/569 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6896 event pairs, 14 based on Foata normal form. 68/970 useless extension candidates. Maximal degree in co-relation 2210. Up to 312 conditions per place. [2024-05-12 12:47:32,204 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 14 changer transitions 1/67 dead transitions. [2024-05-12 12:47:32,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 358 flow [2024-05-12 12:47:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-05-12 12:47:32,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-05-12 12:47:32,206 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 262 flow. Second operand 5 states and 120 transitions. [2024-05-12 12:47:32,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 358 flow [2024-05-12 12:47:32,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 67 transitions, 333 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:47:32,208 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 284 flow [2024-05-12 12:47:32,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-05-12 12:47:32,209 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2024-05-12 12:47:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 284 flow [2024-05-12 12:47:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:47:32,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:47:32,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 12:47:32,210 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:47:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:47:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1540593085, now seen corresponding path program 1 times [2024-05-12 12:47:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:47:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291937712] [2024-05-12 12:47:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:47:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:47:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:47:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:47:32,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:47:32,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291937712] [2024-05-12 12:47:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291937712] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:47:32,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:47:32,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:47:32,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803541549] [2024-05-12 12:47:32,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:47:32,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:47:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:47:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:47:32,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:47:32,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2024-05-12 12:47:32,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 12:47:32,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:47:32,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2024-05-12 12:47:32,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:47:32,440 INFO L124 PetriNetUnfolderBase]: 262/754 cut-off events. [2024-05-12 12:47:32,440 INFO L125 PetriNetUnfolderBase]: For 510/511 co-relation queries the response was YES. [2024-05-12 12:47:32,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1964 conditions, 754 events. 262/754 cut-off events. For 510/511 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5195 event pairs, 140 based on Foata normal form. 41/719 useless extension candidates. Maximal degree in co-relation 1944. Up to 352 conditions per place. [2024-05-12 12:47:32,444 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2024-05-12 12:47:32,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 392 flow [2024-05-12 12:47:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:47:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:47:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-05-12 12:47:32,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2024-05-12 12:47:32,446 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 284 flow. Second operand 5 states and 107 transitions. [2024-05-12 12:47:32,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 392 flow [2024-05-12 12:47:32,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 334 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 12:47:32,449 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2024-05-12 12:47:32,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2024-05-12 12:47:32,450 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 25 predicate places. [2024-05-12 12:47:32,451 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2024-05-12 12:47:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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) [2024-05-12 12:47:32,455 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-05-12 12:47:32,455 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-05-12 12:47:32,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-05-12 12:47:32,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-05-12 12:47:32,456 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-05-12 12:47:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 12:47:32,457 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:47:32,460 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-05-12 12:47:32,460 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-05-12 12:47:32,464 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-05-12 12:47:32,465 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-05-12 12:47:32,466 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.05 12:47:32 BasicIcfg [2024-05-12 12:47:32,466 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-05-12 12:47:32,467 INFO L158 Benchmark]: Toolchain (without parser) took 8923.87ms. Allocated memory was 159.4MB in the beginning and 281.0MB in the end (delta: 121.6MB). Free memory was 114.4MB in the beginning and 106.0MB in the end (delta: 8.5MB). Peak memory consumption was 131.1MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,467 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 85.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:47:32,469 INFO L158 Benchmark]: Witness Parser took 0.48ms. Allocated memory is still 159.4MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-05-12 12:47:32,469 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.64ms. Allocated memory is still 159.4MB. Free memory was 114.4MB in the beginning and 88.5MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,469 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.93ms. Allocated memory is still 159.4MB. Free memory was 88.5MB in the beginning and 86.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,470 INFO L158 Benchmark]: Boogie Preprocessor took 39.62ms. Allocated memory is still 159.4MB. Free memory was 86.4MB in the beginning and 84.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,470 INFO L158 Benchmark]: RCFGBuilder took 391.15ms. Allocated memory is still 159.4MB. Free memory was 84.4MB in the beginning and 64.1MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,471 INFO L158 Benchmark]: TraceAbstraction took 7874.26ms. Allocated memory was 159.4MB in the beginning and 281.0MB in the end (delta: 121.6MB). Free memory was 63.4MB in the beginning and 106.0MB in the end (delta: -42.6MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. [2024-05-12 12:47:32,472 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 85.8MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.48ms. Allocated memory is still 159.4MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 567.64ms. Allocated memory is still 159.4MB. Free memory was 114.4MB in the beginning and 88.5MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.93ms. Allocated memory is still 159.4MB. Free memory was 88.5MB in the beginning and 86.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.62ms. Allocated memory is still 159.4MB. Free memory was 86.4MB in the beginning and 84.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 391.15ms. Allocated memory is still 159.4MB. Free memory was 84.4MB in the beginning and 64.1MB in the end (delta: 20.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 7874.26ms. Allocated memory was 159.4MB in the beginning and 281.0MB in the end (delta: 121.6MB). Free memory was 63.4MB in the beginning and 106.0MB in the end (delta: -42.6MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 759]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 760]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 51 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.7s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1067 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 764 mSDsluCounter, 343 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 221 mSDsCounter, 103 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2944 IncrementalHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 103 mSolverCounterUnsat, 122 mSDtfsCounter, 2944 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=387occurred in iteration=23, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 364 ConstructedInterpolants, 0 QuantifiedInterpolants, 1666 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-05-12 12:47:32,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE