./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe010_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe010_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-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:49:56,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:49:56,174 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:49:56,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:49:56,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:49:56,209 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:49:56,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:49:56,211 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:49:56,211 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:49:56,215 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:49:56,216 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:49:56,216 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:49:56,216 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:49:56,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:49:56,218 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:49:56,218 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:49:56,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:49:56,219 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:49:56,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:49:56,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:49:56,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:49:56,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:49:56,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:49:56,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:49:56,221 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:49:56,221 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:49:56,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:49:56,222 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:49:56,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:49:56,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:49:56,224 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:49:56,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:49:56,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:56,224 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:49:56,224 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:49:56,225 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:49:56,225 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:49:56,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:49:56,225 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:49:56,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:49:56,226 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:49:56,226 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:49:56,226 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:49:56,226 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:49:56,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:49:56,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:49:56,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:49:56,543 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:49:56,543 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:49:56,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-27 21:49:57,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:49:57,944 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:49:57,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i [2024-06-27 21:49:57,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75649005d/6d224a471f624b73943ddbfe919b6012/FLAG3867c66c5 [2024-06-27 21:49:57,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75649005d/6d224a471f624b73943ddbfe919b6012 [2024-06-27 21:49:57,982 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:49:57,982 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:49:57,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe010_tso.yml/witness.yml [2024-06-27 21:49:58,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:49:58,087 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:49:58,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:58,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:49:58,093 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:49:58,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:57" (1/2) ... [2024-06-27 21:49:58,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121a538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:58, skipping insertion in model container [2024-06-27 21:49:58,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:57" (1/2) ... [2024-06-27 21:49:58,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f41b3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:58, skipping insertion in model container [2024-06-27 21:49:58,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:58" (2/2) ... [2024-06-27 21:49:58,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121a538 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58, skipping insertion in model container [2024-06-27 21:49:58,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:58" (2/2) ... [2024-06-27 21:49:58,099 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:49:58,128 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:49:58,130 INFO L97 edCorrectnessWitness]: Location invariant before [L761-L761] ! multithreaded || ((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 21:49:58,130 INFO L97 edCorrectnessWitness]: Location invariant before [L762-L762] ! multithreaded || ((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) [2024-06-27 21:49:58,130 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:49:58,130 INFO L106 edCorrectnessWitness]: ghost_update [L759-L759] multithreaded = 1; [2024-06-27 21:49:58,177 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:49:58,337 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i[945,958] [2024-06-27 21:49:58,532 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:58,550 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 21:49:58,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:49:58,702 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:58,731 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:49:58,732 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58 WrapperNode [2024-06-27 21:49:58,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:58,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:58,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:49:58,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:49:58,740 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 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,752 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 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,787 INFO L138 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2024-06-27 21:49:58,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:58,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:49:58,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:49:58,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:49:58,804 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,806 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,820 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:49:58,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,832 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:49:58,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:49:58,835 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:49:58,835 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:49:58,836 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (1/1) ... [2024-06-27 21:49:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:58,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:58,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:49:58,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:49:58,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:49:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:49:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:49:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:49:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:49:58,903 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:49:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:49:58,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:49:58,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:49:58,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:49:58,905 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:49:59,009 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:49:59,011 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:49:59,136 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:49:59,137 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:49:59,221 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:49:59,222 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:49:59,222 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:59 BoogieIcfgContainer [2024-06-27 21:49:59,222 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:49:59,224 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:49:59,225 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:49:59,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:49:59,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:49:57" (1/4) ... [2024-06-27 21:49:59,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fee08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:49:59, skipping insertion in model container [2024-06-27 21:49:59,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:58" (2/4) ... [2024-06-27 21:49:59,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fee08e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:49:59, skipping insertion in model container [2024-06-27 21:49:59,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:58" (3/4) ... [2024-06-27 21:49:59,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fee08e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:49:59, skipping insertion in model container [2024-06-27 21:49:59,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:59" (4/4) ... [2024-06-27 21:49:59,232 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_tso.i [2024-06-27 21:49:59,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:49:59,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:49:59,250 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:49:59,284 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:49:59,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 21:49:59,340 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2024-06-27 21:49:59,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:59,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 1/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 44 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-06-27 21:49:59,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 34 transitions, 76 flow [2024-06-27 21:49:59,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 29 transitions, 64 flow [2024-06-27 21:49:59,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:49:59,363 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;@184e2bb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:49:59,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:49:59,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:49:59,374 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:49:59,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:59,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:59,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:49:59,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:59,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:59,386 INFO L85 PathProgramCache]: Analyzing trace with hash 177157215, now seen corresponding path program 1 times [2024-06-27 21:49:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:59,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807923192] [2024-06-27 21:49:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:59,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807923192] [2024-06-27 21:49:59,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807923192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:59,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:59,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:49:59,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350694521] [2024-06-27 21:49:59,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:49:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:49:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:49:59,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 21:49:59,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:59,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:59,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 21:49:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:59,989 INFO L124 PetriNetUnfolderBase]: 149/308 cut-off events. [2024-06-27 21:49:59,990 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 21:49:59,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 308 events. 149/308 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1427 event pairs, 82 based on Foata normal form. 1/294 useless extension candidates. Maximal degree in co-relation 581. Up to 261 conditions per place. [2024-06-27 21:49:59,996 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-27 21:49:59,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 133 flow [2024-06-27 21:49:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:50:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:50:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 21:50:00,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2024-06-27 21:50:00,013 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 64 flow. Second operand 3 states and 72 transitions. [2024-06-27 21:50:00,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 133 flow [2024-06-27 21:50:00,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:00,019 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 83 flow [2024-06-27 21:50:00,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-27 21:50:00,025 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-06-27 21:50:00,026 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 83 flow [2024-06-27 21:50:00,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:00,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:00,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:00,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:50:00,028 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)] === [2024-06-27 21:50:00,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1550596418, now seen corresponding path program 1 times [2024-06-27 21:50:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:00,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159567163] [2024-06-27 21:50:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:00,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:00,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159567163] [2024-06-27 21:50:00,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159567163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:00,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:00,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:50:00,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309009783] [2024-06-27 21:50:00,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:50:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:50:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:50:00,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2024-06-27 21:50:00,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:00,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:00,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2024-06-27 21:50:00,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:00,426 INFO L124 PetriNetUnfolderBase]: 154/319 cut-off events. [2024-06-27 21:50:00,426 INFO L125 PetriNetUnfolderBase]: For 52/55 co-relation queries the response was YES. [2024-06-27 21:50:00,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689 conditions, 319 events. 154/319 cut-off events. For 52/55 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1487 event pairs, 51 based on Foata normal form. 5/320 useless extension candidates. Maximal degree in co-relation 677. Up to 232 conditions per place. [2024-06-27 21:50:00,433 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 30 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-06-27 21:50:00,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 207 flow [2024-06-27 21:50:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 21:50:00,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7279411764705882 [2024-06-27 21:50:00,438 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 83 flow. Second operand 4 states and 99 transitions. [2024-06-27 21:50:00,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 207 flow [2024-06-27 21:50:00,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:50:00,440 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 135 flow [2024-06-27 21:50:00,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-06-27 21:50:00,442 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-06-27 21:50:00,442 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 135 flow [2024-06-27 21:50:00,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:00,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:00,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:50:00,444 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)] === [2024-06-27 21:50:00,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash -823848272, now seen corresponding path program 1 times [2024-06-27 21:50:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:00,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327272307] [2024-06-27 21:50:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:00,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:00,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327272307] [2024-06-27 21:50:00,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327272307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:00,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669910398] [2024-06-27 21:50:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:00,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:00,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 135 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) [2024-06-27 21:50:00,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:00,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:00,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:00,723 INFO L124 PetriNetUnfolderBase]: 187/380 cut-off events. [2024-06-27 21:50:00,723 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-06-27 21:50:00,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 380 events. 187/380 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1803 event pairs, 48 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 970. Up to 297 conditions per place. [2024-06-27 21:50:00,727 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 43 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-06-27 21:50:00,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 298 flow [2024-06-27 21:50:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 21:50:00,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-06-27 21:50:00,734 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 135 flow. Second operand 5 states and 114 transitions. [2024-06-27 21:50:00,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 298 flow [2024-06-27 21:50:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 296 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:00,739 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 189 flow [2024-06-27 21:50:00,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-27 21:50:00,740 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-06-27 21:50:00,740 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 189 flow [2024-06-27 21:50:00,741 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) [2024-06-27 21:50:00,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:00,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:00,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:50:00,742 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)] === [2024-06-27 21:50:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1444192145, now seen corresponding path program 1 times [2024-06-27 21:50:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:00,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022365545] [2024-06-27 21:50:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:00,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:00,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022365545] [2024-06-27 21:50:00,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022365545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:00,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:00,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13245725] [2024-06-27 21:50:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:00,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:00,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:00,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 189 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) [2024-06-27 21:50:00,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:00,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:00,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:01,002 INFO L124 PetriNetUnfolderBase]: 183/381 cut-off events. [2024-06-27 21:50:01,003 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-27 21:50:01,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 381 events. 183/381 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1795 event pairs, 45 based on Foata normal form. 4/378 useless extension candidates. Maximal degree in co-relation 1076. Up to 263 conditions per place. [2024-06-27 21:50:01,006 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 45 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-27 21:50:01,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 337 flow [2024-06-27 21:50:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-27 21:50:01,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2024-06-27 21:50:01,008 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 189 flow. Second operand 6 states and 131 transitions. [2024-06-27 21:50:01,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 337 flow [2024-06-27 21:50:01,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 21:50:01,011 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 201 flow [2024-06-27 21:50:01,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-06-27 21:50:01,012 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-06-27 21:50:01,012 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 201 flow [2024-06-27 21:50:01,013 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) [2024-06-27 21:50:01,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:01,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:01,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:50:01,013 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)] === [2024-06-27 21:50:01,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:01,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1840912348, now seen corresponding path program 1 times [2024-06-27 21:50:01,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:01,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628116403] [2024-06-27 21:50:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:01,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:01,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628116403] [2024-06-27 21:50:01,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628116403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:01,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:01,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392982573] [2024-06-27 21:50:01,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:01,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:01,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:01,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:01,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:01,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:01,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:01,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:01,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:01,292 INFO L124 PetriNetUnfolderBase]: 178/369 cut-off events. [2024-06-27 21:50:01,292 INFO L125 PetriNetUnfolderBase]: For 569/572 co-relation queries the response was YES. [2024-06-27 21:50:01,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 369 events. 178/369 cut-off events. For 569/572 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1769 event pairs, 46 based on Foata normal form. 4/370 useless extension candidates. Maximal degree in co-relation 1101. Up to 255 conditions per place. [2024-06-27 21:50:01,296 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 31 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-06-27 21:50:01,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 301 flow [2024-06-27 21:50:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:01,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-27 21:50:01,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6691176470588235 [2024-06-27 21:50:01,298 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 201 flow. Second operand 4 states and 91 transitions. [2024-06-27 21:50:01,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 301 flow [2024-06-27 21:50:01,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 280 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:01,302 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 205 flow [2024-06-27 21:50:01,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-27 21:50:01,303 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-06-27 21:50:01,303 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 205 flow [2024-06-27 21:50:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:01,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:50:01,304 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)] === [2024-06-27 21:50:01,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:01,305 INFO L85 PathProgramCache]: Analyzing trace with hash 366925761, now seen corresponding path program 1 times [2024-06-27 21:50:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:01,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513274918] [2024-06-27 21:50:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:01,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:01,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513274918] [2024-06-27 21:50:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513274918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:01,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780585092] [2024-06-27 21:50:01,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:01,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:01,545 INFO L124 PetriNetUnfolderBase]: 194/403 cut-off events. [2024-06-27 21:50:01,545 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-06-27 21:50:01,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 403 events. 194/403 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1974 event pairs, 39 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 1201. Up to 227 conditions per place. [2024-06-27 21:50:01,548 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 43 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-27 21:50:01,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 431 flow [2024-06-27 21:50:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:50:01,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6911764705882353 [2024-06-27 21:50:01,550 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 205 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:50:01,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 431 flow [2024-06-27 21:50:01,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 409 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:01,555 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 262 flow [2024-06-27 21:50:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-27 21:50:01,558 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2024-06-27 21:50:01,558 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 262 flow [2024-06-27 21:50:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:01,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:01,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:50:01,559 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)] === [2024-06-27 21:50:01,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash -587112733, now seen corresponding path program 2 times [2024-06-27 21:50:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:01,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147894776] [2024-06-27 21:50:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:01,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147894776] [2024-06-27 21:50:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147894776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:01,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:01,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813724671] [2024-06-27 21:50:01,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:01,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:01,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:01,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:01,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:01,838 INFO L124 PetriNetUnfolderBase]: 208/420 cut-off events. [2024-06-27 21:50:01,839 INFO L125 PetriNetUnfolderBase]: For 755/755 co-relation queries the response was YES. [2024-06-27 21:50:01,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 420 events. 208/420 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2075 event pairs, 39 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1395. Up to 288 conditions per place. [2024-06-27 21:50:01,842 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 45 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2024-06-27 21:50:01,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 454 flow [2024-06-27 21:50:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 21:50:01,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-06-27 21:50:01,844 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 262 flow. Second operand 6 states and 133 transitions. [2024-06-27 21:50:01,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 454 flow [2024-06-27 21:50:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 437 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 21:50:01,848 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 316 flow [2024-06-27 21:50:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2024-06-27 21:50:01,849 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-06-27 21:50:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 316 flow [2024-06-27 21:50:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:01,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:01,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:50:01,850 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)] === [2024-06-27 21:50:01,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash -992988735, now seen corresponding path program 3 times [2024-06-27 21:50:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:01,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737135562] [2024-06-27 21:50:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:01,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:01,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737135562] [2024-06-27 21:50:01,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737135562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:01,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:01,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248695150] [2024-06-27 21:50:01,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:01,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:01,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:01,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:01,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:02,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:02,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:02,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:02,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:02,121 INFO L124 PetriNetUnfolderBase]: 213/443 cut-off events. [2024-06-27 21:50:02,122 INFO L125 PetriNetUnfolderBase]: For 1083/1083 co-relation queries the response was YES. [2024-06-27 21:50:02,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532 conditions, 443 events. 213/443 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2250 event pairs, 39 based on Foata normal form. 2/439 useless extension candidates. Maximal degree in co-relation 1506. Up to 253 conditions per place. [2024-06-27 21:50:02,125 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 45 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2024-06-27 21:50:02,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 524 flow [2024-06-27 21:50:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 21:50:02,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813725490196079 [2024-06-27 21:50:02,127 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 316 flow. Second operand 6 states and 139 transitions. [2024-06-27 21:50:02,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 524 flow [2024-06-27 21:50:02,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 487 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:02,133 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 354 flow [2024-06-27 21:50:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-06-27 21:50:02,134 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2024-06-27 21:50:02,134 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 354 flow [2024-06-27 21:50:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:02,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:50:02,135 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)] === [2024-06-27 21:50:02,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash -992742471, now seen corresponding path program 1 times [2024-06-27 21:50:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:02,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192113346] [2024-06-27 21:50:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192113346] [2024-06-27 21:50:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192113346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:02,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604407445] [2024-06-27 21:50:02,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:02,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:02,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:02,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:02,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:02,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:02,377 INFO L124 PetriNetUnfolderBase]: 220/455 cut-off events. [2024-06-27 21:50:02,377 INFO L125 PetriNetUnfolderBase]: For 1429/1432 co-relation queries the response was YES. [2024-06-27 21:50:02,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1635 conditions, 455 events. 220/455 cut-off events. For 1429/1432 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2333 event pairs, 47 based on Foata normal form. 6/455 useless extension candidates. Maximal degree in co-relation 1607. Up to 288 conditions per place. [2024-06-27 21:50:02,381 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 45 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-27 21:50:02,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 502 flow [2024-06-27 21:50:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 21:50:02,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2024-06-27 21:50:02,383 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 354 flow. Second operand 5 states and 110 transitions. [2024-06-27 21:50:02,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 502 flow [2024-06-27 21:50:02,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 461 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:02,389 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 350 flow [2024-06-27 21:50:02,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-27 21:50:02,390 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2024-06-27 21:50:02,390 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 350 flow [2024-06-27 21:50:02,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:02,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:02,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:50:02,409 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)] === [2024-06-27 21:50:02,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1510202561, now seen corresponding path program 1 times [2024-06-27 21:50:02,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:02,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390165526] [2024-06-27 21:50:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:02,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:02,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390165526] [2024-06-27 21:50:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390165526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:02,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:02,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139272193] [2024-06-27 21:50:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:02,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:02,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:02,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:02,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:02,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:02,654 INFO L124 PetriNetUnfolderBase]: 218/450 cut-off events. [2024-06-27 21:50:02,654 INFO L125 PetriNetUnfolderBase]: For 1219/1222 co-relation queries the response was YES. [2024-06-27 21:50:02,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 450 events. 218/450 cut-off events. For 1219/1222 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2298 event pairs, 52 based on Foata normal form. 3/443 useless extension candidates. Maximal degree in co-relation 1582. Up to 249 conditions per place. [2024-06-27 21:50:02,658 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 46 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-27 21:50:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 536 flow [2024-06-27 21:50:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-27 21:50:02,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-06-27 21:50:02,660 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 350 flow. Second operand 6 states and 134 transitions. [2024-06-27 21:50:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 536 flow [2024-06-27 21:50:02,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 499 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:02,664 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 354 flow [2024-06-27 21:50:02,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-27 21:50:02,665 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 31 predicate places. [2024-06-27 21:50:02,665 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 354 flow [2024-06-27 21:50:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:02,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:02,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:50:02,666 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)] === [2024-06-27 21:50:02,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1248195521, now seen corresponding path program 2 times [2024-06-27 21:50:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:02,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320231014] [2024-06-27 21:50:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320231014] [2024-06-27 21:50:02,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320231014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:02,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:02,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507077923] [2024-06-27 21:50:02,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:02,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:02,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:02,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:02,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 354 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:02,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:02,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:02,899 INFO L124 PetriNetUnfolderBase]: 225/465 cut-off events. [2024-06-27 21:50:02,900 INFO L125 PetriNetUnfolderBase]: For 1434/1437 co-relation queries the response was YES. [2024-06-27 21:50:02,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 465 events. 225/465 cut-off events. For 1434/1437 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2405 event pairs, 52 based on Foata normal form. 3/458 useless extension candidates. Maximal degree in co-relation 1635. Up to 271 conditions per place. [2024-06-27 21:50:02,903 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 45 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-27 21:50:02,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 74 transitions, 552 flow [2024-06-27 21:50:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-27 21:50:02,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 21:50:02,906 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 354 flow. Second operand 5 states and 115 transitions. [2024-06-27 21:50:02,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 74 transitions, 552 flow [2024-06-27 21:50:02,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 484 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:02,912 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 346 flow [2024-06-27 21:50:02,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-06-27 21:50:02,913 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-06-27 21:50:02,913 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 346 flow [2024-06-27 21:50:02,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:02,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:02,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:02,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:50:02,914 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)] === [2024-06-27 21:50:02,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:02,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1248189941, now seen corresponding path program 3 times [2024-06-27 21:50:02,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:02,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972085187] [2024-06-27 21:50:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:02,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:03,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972085187] [2024-06-27 21:50:03,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972085187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:03,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:03,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428760229] [2024-06-27 21:50:03,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:03,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:03,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:03,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:03,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:03,167 INFO L124 PetriNetUnfolderBase]: 223/462 cut-off events. [2024-06-27 21:50:03,167 INFO L125 PetriNetUnfolderBase]: For 1321/1324 co-relation queries the response was YES. [2024-06-27 21:50:03,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 462 events. 223/462 cut-off events. For 1321/1324 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2393 event pairs, 46 based on Foata normal form. 3/460 useless extension candidates. Maximal degree in co-relation 1577. Up to 269 conditions per place. [2024-06-27 21:50:03,171 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 46 selfloop transitions, 22 changer transitions 0/79 dead transitions. [2024-06-27 21:50:03,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 528 flow [2024-06-27 21:50:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:03,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 21:50:03,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 21:50:03,173 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 346 flow. Second operand 7 states and 153 transitions. [2024-06-27 21:50:03,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 528 flow [2024-06-27 21:50:03,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 505 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:03,178 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 372 flow [2024-06-27 21:50:03,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-06-27 21:50:03,179 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-06-27 21:50:03,179 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 372 flow [2024-06-27 21:50:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:03,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:50:03,180 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)] === [2024-06-27 21:50:03,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:03,181 INFO L85 PathProgramCache]: Analyzing trace with hash 425499712, now seen corresponding path program 1 times [2024-06-27 21:50:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:03,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033049029] [2024-06-27 21:50:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:03,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033049029] [2024-06-27 21:50:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033049029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:03,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:03,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700056457] [2024-06-27 21:50:03,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:03,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:03,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 372 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:03,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:03,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:03,477 INFO L124 PetriNetUnfolderBase]: 275/568 cut-off events. [2024-06-27 21:50:03,477 INFO L125 PetriNetUnfolderBase]: For 2195/2195 co-relation queries the response was YES. [2024-06-27 21:50:03,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 568 events. 275/568 cut-off events. For 2195/2195 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3097 event pairs, 36 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 1994. Up to 196 conditions per place. [2024-06-27 21:50:03,482 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 50 selfloop transitions, 28 changer transitions 0/89 dead transitions. [2024-06-27 21:50:03,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 632 flow [2024-06-27 21:50:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:50:03,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6764705882352942 [2024-06-27 21:50:03,484 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 372 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:50:03,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 632 flow [2024-06-27 21:50:03,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 571 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:50:03,491 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 379 flow [2024-06-27 21:50:03,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=379, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-27 21:50:03,492 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-06-27 21:50:03,492 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 379 flow [2024-06-27 21:50:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:03,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:50:03,493 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)] === [2024-06-27 21:50:03,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1664562504, now seen corresponding path program 2 times [2024-06-27 21:50:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122155046] [2024-06-27 21:50:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122155046] [2024-06-27 21:50:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122155046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:03,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:03,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368295711] [2024-06-27 21:50:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:03,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:03,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:03,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:03,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:03,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:03,775 INFO L124 PetriNetUnfolderBase]: 285/576 cut-off events. [2024-06-27 21:50:03,775 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2024-06-27 21:50:03,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 576 events. 285/576 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3120 event pairs, 60 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 2090. Up to 359 conditions per place. [2024-06-27 21:50:03,781 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 47 selfloop transitions, 27 changer transitions 0/85 dead transitions. [2024-06-27 21:50:03,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 85 transitions, 593 flow [2024-06-27 21:50:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 21:50:03,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638655462184874 [2024-06-27 21:50:03,783 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 379 flow. Second operand 7 states and 158 transitions. [2024-06-27 21:50:03,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 85 transitions, 593 flow [2024-06-27 21:50:03,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 85 transitions, 539 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:03,791 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 395 flow [2024-06-27 21:50:03,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2024-06-27 21:50:03,792 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2024-06-27 21:50:03,792 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 395 flow [2024-06-27 21:50:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:03,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:03,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:50:03,793 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)] === [2024-06-27 21:50:03,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2004276530, now seen corresponding path program 3 times [2024-06-27 21:50:03,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:03,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598817363] [2024-06-27 21:50:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:03,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:03,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598817363] [2024-06-27 21:50:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598817363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:03,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:03,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:03,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224648642] [2024-06-27 21:50:03,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:03,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:03,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 395 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:03,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:03,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:03,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:04,093 INFO L124 PetriNetUnfolderBase]: 295/588 cut-off events. [2024-06-27 21:50:04,094 INFO L125 PetriNetUnfolderBase]: For 2772/2772 co-relation queries the response was YES. [2024-06-27 21:50:04,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 588 events. 295/588 cut-off events. For 2772/2772 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3256 event pairs, 51 based on Foata normal form. 2/584 useless extension candidates. Maximal degree in co-relation 2179. Up to 436 conditions per place. [2024-06-27 21:50:04,099 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 56 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-27 21:50:04,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 83 transitions, 598 flow [2024-06-27 21:50:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:04,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 21:50:04,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6386554621848739 [2024-06-27 21:50:04,101 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 395 flow. Second operand 7 states and 152 transitions. [2024-06-27 21:50:04,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 83 transitions, 598 flow [2024-06-27 21:50:04,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 540 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:04,108 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 386 flow [2024-06-27 21:50:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-06-27 21:50:04,110 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2024-06-27 21:50:04,110 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 386 flow [2024-06-27 21:50:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:04,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:04,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:50:04,111 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:04,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -779416000, now seen corresponding path program 4 times [2024-06-27 21:50:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806826377] [2024-06-27 21:50:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:04,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:04,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806826377] [2024-06-27 21:50:04,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806826377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:04,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:04,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:04,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284717239] [2024-06-27 21:50:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:04,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:04,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:04,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:04,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:04,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:04,465 INFO L124 PetriNetUnfolderBase]: 282/565 cut-off events. [2024-06-27 21:50:04,465 INFO L125 PetriNetUnfolderBase]: For 2785/2785 co-relation queries the response was YES. [2024-06-27 21:50:04,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1974 conditions, 565 events. 282/565 cut-off events. For 2785/2785 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3077 event pairs, 23 based on Foata normal form. 10/570 useless extension candidates. Maximal degree in co-relation 1942. Up to 256 conditions per place. [2024-06-27 21:50:04,469 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 52 selfloop transitions, 26 changer transitions 0/89 dead transitions. [2024-06-27 21:50:04,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 89 transitions, 612 flow [2024-06-27 21:50:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 21:50:04,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6722689075630253 [2024-06-27 21:50:04,471 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 386 flow. Second operand 7 states and 160 transitions. [2024-06-27 21:50:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 89 transitions, 612 flow [2024-06-27 21:50:04,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 570 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:04,478 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 405 flow [2024-06-27 21:50:04,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2024-06-27 21:50:04,479 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-06-27 21:50:04,479 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 405 flow [2024-06-27 21:50:04,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:04,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:04,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:50:04,480 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)] === [2024-06-27 21:50:04,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1282992474, now seen corresponding path program 1 times [2024-06-27 21:50:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:04,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463975184] [2024-06-27 21:50:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:04,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:04,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:04,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463975184] [2024-06-27 21:50:04,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463975184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:04,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:04,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:04,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113755951] [2024-06-27 21:50:04,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:04,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:04,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:04,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:04,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:04,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:04,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:04,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:04,702 INFO L124 PetriNetUnfolderBase]: 292/583 cut-off events. [2024-06-27 21:50:04,702 INFO L125 PetriNetUnfolderBase]: For 2257/2257 co-relation queries the response was YES. [2024-06-27 21:50:04,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 583 events. 292/583 cut-off events. For 2257/2257 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3233 event pairs, 46 based on Foata normal form. 2/579 useless extension candidates. Maximal degree in co-relation 2039. Up to 438 conditions per place. [2024-06-27 21:50:04,707 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 54 selfloop transitions, 13 changer transitions 0/78 dead transitions. [2024-06-27 21:50:04,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 581 flow [2024-06-27 21:50:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 21:50:04,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2024-06-27 21:50:04,708 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 405 flow. Second operand 5 states and 114 transitions. [2024-06-27 21:50:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 581 flow [2024-06-27 21:50:04,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 519 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 21:50:04,716 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 381 flow [2024-06-27 21:50:04,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-06-27 21:50:04,717 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2024-06-27 21:50:04,717 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 381 flow [2024-06-27 21:50:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:04,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:04,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:50:04,718 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)] === [2024-06-27 21:50:04,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -542759272, now seen corresponding path program 2 times [2024-06-27 21:50:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382008891] [2024-06-27 21:50:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:04,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:04,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:04,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382008891] [2024-06-27 21:50:04,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382008891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:04,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:04,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:04,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687318553] [2024-06-27 21:50:04,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:04,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:04,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:04,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:04,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:04,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:04,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:04,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:04,923 INFO L124 PetriNetUnfolderBase]: 289/588 cut-off events. [2024-06-27 21:50:04,923 INFO L125 PetriNetUnfolderBase]: For 1776/1779 co-relation queries the response was YES. [2024-06-27 21:50:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 588 events. 289/588 cut-off events. For 1776/1779 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3282 event pairs, 56 based on Foata normal form. 4/581 useless extension candidates. Maximal degree in co-relation 1926. Up to 387 conditions per place. [2024-06-27 21:50:04,927 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 54 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-27 21:50:04,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 541 flow [2024-06-27 21:50:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-27 21:50:04,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352941176470588 [2024-06-27 21:50:04,929 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 381 flow. Second operand 5 states and 108 transitions. [2024-06-27 21:50:04,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 541 flow [2024-06-27 21:50:04,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 513 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:04,936 INFO L231 Difference]: Finished difference. Result has 78 places, 62 transitions, 379 flow [2024-06-27 21:50:04,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2024-06-27 21:50:04,936 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-06-27 21:50:04,936 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 379 flow [2024-06-27 21:50:04,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:04,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:04,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:50:04,937 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:04,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash 348044772, now seen corresponding path program 1 times [2024-06-27 21:50:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922708017] [2024-06-27 21:50:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:05,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:05,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922708017] [2024-06-27 21:50:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922708017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:05,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:50:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872470691] [2024-06-27 21:50:05,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:50:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:50:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:50:05,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 21:50:05,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 379 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:05,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 21:50:05,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:05,125 INFO L124 PetriNetUnfolderBase]: 178/531 cut-off events. [2024-06-27 21:50:05,125 INFO L125 PetriNetUnfolderBase]: For 646/649 co-relation queries the response was YES. [2024-06-27 21:50:05,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 531 events. 178/531 cut-off events. For 646/649 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3273 event pairs, 14 based on Foata normal form. 33/531 useless extension candidates. Maximal degree in co-relation 1302. Up to 174 conditions per place. [2024-06-27 21:50:05,130 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 20 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2024-06-27 21:50:05,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 477 flow [2024-06-27 21:50:05,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:50:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:50:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 21:50:05,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-06-27 21:50:05,131 INFO L175 Difference]: Start difference. First operand has 78 places, 62 transitions, 379 flow. Second operand 4 states and 102 transitions. [2024-06-27 21:50:05,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 477 flow [2024-06-27 21:50:05,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 451 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:05,136 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 419 flow [2024-06-27 21:50:05,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=419, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-06-27 21:50:05,136 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 44 predicate places. [2024-06-27 21:50:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 419 flow [2024-06-27 21:50:05,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:05,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:05,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:50:05,137 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)] === [2024-06-27 21:50:05,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash -28989374, now seen corresponding path program 1 times [2024-06-27 21:50:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:05,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029746512] [2024-06-27 21:50:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:05,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:05,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029746512] [2024-06-27 21:50:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029746512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:05,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:05,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:05,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532653220] [2024-06-27 21:50:05,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:05,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:05,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:05,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:05,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:05,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:05,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:05,420 INFO L124 PetriNetUnfolderBase]: 287/656 cut-off events. [2024-06-27 21:50:05,420 INFO L125 PetriNetUnfolderBase]: For 2813/2824 co-relation queries the response was YES. [2024-06-27 21:50:05,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 656 events. 287/656 cut-off events. For 2813/2824 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3895 event pairs, 123 based on Foata normal form. 16/626 useless extension candidates. Maximal degree in co-relation 2100. Up to 407 conditions per place. [2024-06-27 21:50:05,425 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 48 selfloop transitions, 20 changer transitions 0/80 dead transitions. [2024-06-27 21:50:05,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 80 transitions, 605 flow [2024-06-27 21:50:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 21:50:05,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134453781512605 [2024-06-27 21:50:05,427 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 419 flow. Second operand 7 states and 146 transitions. [2024-06-27 21:50:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 80 transitions, 605 flow [2024-06-27 21:50:05,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 80 transitions, 578 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:50:05,434 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 438 flow [2024-06-27 21:50:05,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2024-06-27 21:50:05,435 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2024-06-27 21:50:05,435 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 438 flow [2024-06-27 21:50:05,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:05,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:05,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:50:05,436 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)] === [2024-06-27 21:50:05,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 305589920, now seen corresponding path program 2 times [2024-06-27 21:50:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:05,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068072985] [2024-06-27 21:50:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068072985] [2024-06-27 21:50:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068072985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820553166] [2024-06-27 21:50:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:05,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:05,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:05,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 438 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:05,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:05,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:05,733 INFO L124 PetriNetUnfolderBase]: 340/795 cut-off events. [2024-06-27 21:50:05,733 INFO L125 PetriNetUnfolderBase]: For 3597/3608 co-relation queries the response was YES. [2024-06-27 21:50:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 795 events. 340/795 cut-off events. For 3597/3608 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5118 event pairs, 148 based on Foata normal form. 14/759 useless extension candidates. Maximal degree in co-relation 2519. Up to 362 conditions per place. [2024-06-27 21:50:05,738 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 56 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-27 21:50:05,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 694 flow [2024-06-27 21:50:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 21:50:05,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634453781512605 [2024-06-27 21:50:05,740 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 438 flow. Second operand 7 states and 151 transitions. [2024-06-27 21:50:05,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 694 flow [2024-06-27 21:50:05,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 88 transitions, 656 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:05,748 INFO L231 Difference]: Finished difference. Result has 86 places, 63 transitions, 443 flow [2024-06-27 21:50:05,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2024-06-27 21:50:05,749 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2024-06-27 21:50:05,749 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 443 flow [2024-06-27 21:50:05,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:05,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:50:05,750 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)] === [2024-06-27 21:50:05,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash 394155680, now seen corresponding path program 3 times [2024-06-27 21:50:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660455471] [2024-06-27 21:50:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:05,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:05,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660455471] [2024-06-27 21:50:05,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660455471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:05,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105965726] [2024-06-27 21:50:05,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:05,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:05,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 443 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:05,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:05,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:05,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:06,032 INFO L124 PetriNetUnfolderBase]: 363/865 cut-off events. [2024-06-27 21:50:06,033 INFO L125 PetriNetUnfolderBase]: For 3971/3982 co-relation queries the response was YES. [2024-06-27 21:50:06,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2738 conditions, 865 events. 363/865 cut-off events. For 3971/3982 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5770 event pairs, 185 based on Foata normal form. 14/824 useless extension candidates. Maximal degree in co-relation 2701. Up to 502 conditions per place. [2024-06-27 21:50:06,039 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 53 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-27 21:50:06,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 85 transitions, 653 flow [2024-06-27 21:50:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 21:50:06,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634453781512605 [2024-06-27 21:50:06,041 INFO L175 Difference]: Start difference. First operand has 86 places, 63 transitions, 443 flow. Second operand 7 states and 151 transitions. [2024-06-27 21:50:06,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 85 transitions, 653 flow [2024-06-27 21:50:06,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 614 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:06,052 INFO L231 Difference]: Finished difference. Result has 88 places, 63 transitions, 447 flow [2024-06-27 21:50:06,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2024-06-27 21:50:06,053 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 52 predicate places. [2024-06-27 21:50:06,053 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 447 flow [2024-06-27 21:50:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:06,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:06,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:50:06,054 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)] === [2024-06-27 21:50:06,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1214639094, now seen corresponding path program 4 times [2024-06-27 21:50:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144658772] [2024-06-27 21:50:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:06,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:06,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:06,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144658772] [2024-06-27 21:50:06,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144658772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:06,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:06,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:06,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526242348] [2024-06-27 21:50:06,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:06,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:06,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:06,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:06,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:06,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:06,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 447 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:06,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:06,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:06,400 INFO L124 PetriNetUnfolderBase]: 367/861 cut-off events. [2024-06-27 21:50:06,400 INFO L125 PetriNetUnfolderBase]: For 3725/3736 co-relation queries the response was YES. [2024-06-27 21:50:06,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 861 events. 367/861 cut-off events. For 3725/3736 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5737 event pairs, 190 based on Foata normal form. 18/821 useless extension candidates. Maximal degree in co-relation 2625. Up to 593 conditions per place. [2024-06-27 21:50:06,406 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 47 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2024-06-27 21:50:06,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 81 transitions, 635 flow [2024-06-27 21:50:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 21:50:06,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6029411764705882 [2024-06-27 21:50:06,410 INFO L175 Difference]: Start difference. First operand has 88 places, 63 transitions, 447 flow. Second operand 8 states and 164 transitions. [2024-06-27 21:50:06,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 81 transitions, 635 flow [2024-06-27 21:50:06,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 81 transitions, 596 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:06,422 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 456 flow [2024-06-27 21:50:06,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=456, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2024-06-27 21:50:06,423 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 21:50:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 456 flow [2024-06-27 21:50:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:06,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:50:06,424 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)] === [2024-06-27 21:50:06,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1220001474, now seen corresponding path program 5 times [2024-06-27 21:50:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425008672] [2024-06-27 21:50:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:06,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:06,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425008672] [2024-06-27 21:50:06,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425008672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:06,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:06,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569066551] [2024-06-27 21:50:06,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:06,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:06,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:06,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:06,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:06,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:06,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:06,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:06,733 INFO L124 PetriNetUnfolderBase]: 401/955 cut-off events. [2024-06-27 21:50:06,733 INFO L125 PetriNetUnfolderBase]: For 4046/4057 co-relation queries the response was YES. [2024-06-27 21:50:06,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 955 events. 401/955 cut-off events. For 4046/4057 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6640 event pairs, 228 based on Foata normal form. 16/907 useless extension candidates. Maximal degree in co-relation 2850. Up to 667 conditions per place. [2024-06-27 21:50:06,740 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 49 selfloop transitions, 18 changer transitions 0/79 dead transitions. [2024-06-27 21:50:06,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 79 transitions, 636 flow [2024-06-27 21:50:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 21:50:06,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-06-27 21:50:06,742 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 456 flow. Second operand 6 states and 129 transitions. [2024-06-27 21:50:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 79 transitions, 636 flow [2024-06-27 21:50:06,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 79 transitions, 594 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:06,752 INFO L231 Difference]: Finished difference. Result has 91 places, 63 transitions, 454 flow [2024-06-27 21:50:06,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=454, PETRI_PLACES=91, PETRI_TRANSITIONS=63} [2024-06-27 21:50:06,753 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-06-27 21:50:06,753 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 63 transitions, 454 flow [2024-06-27 21:50:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:06,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:06,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:50:06,754 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:06,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1220149344, now seen corresponding path program 6 times [2024-06-27 21:50:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593920250] [2024-06-27 21:50:06,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593920250] [2024-06-27 21:50:06,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593920250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:06,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:06,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733393106] [2024-06-27 21:50:06,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:06,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:06,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:06,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:06,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 63 transitions, 454 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:06,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:06,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:07,065 INFO L124 PetriNetUnfolderBase]: 410/982 cut-off events. [2024-06-27 21:50:07,065 INFO L125 PetriNetUnfolderBase]: For 3541/3552 co-relation queries the response was YES. [2024-06-27 21:50:07,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 982 events. 410/982 cut-off events. For 3541/3552 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6929 event pairs, 182 based on Foata normal form. 14/936 useless extension candidates. Maximal degree in co-relation 2876. Up to 407 conditions per place. [2024-06-27 21:50:07,078 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 53 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-27 21:50:07,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 84 transitions, 660 flow [2024-06-27 21:50:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-27 21:50:07,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2024-06-27 21:50:07,080 INFO L175 Difference]: Start difference. First operand has 91 places, 63 transitions, 454 flow. Second operand 6 states and 133 transitions. [2024-06-27 21:50:07,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 84 transitions, 660 flow [2024-06-27 21:50:07,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 84 transitions, 626 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:07,128 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 462 flow [2024-06-27 21:50:07,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=462, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2024-06-27 21:50:07,128 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-06-27 21:50:07,128 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 462 flow [2024-06-27 21:50:07,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:07,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:07,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:07,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:50:07,129 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:07,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1214423892, now seen corresponding path program 1 times [2024-06-27 21:50:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301173358] [2024-06-27 21:50:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:07,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:07,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301173358] [2024-06-27 21:50:07,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301173358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:07,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:07,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959139057] [2024-06-27 21:50:07,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:07,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:07,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 462 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:07,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:07,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:07,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:07,460 INFO L124 PetriNetUnfolderBase]: 433/1048 cut-off events. [2024-06-27 21:50:07,460 INFO L125 PetriNetUnfolderBase]: For 3997/4008 co-relation queries the response was YES. [2024-06-27 21:50:07,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3106 conditions, 1048 events. 433/1048 cut-off events. For 3997/4008 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7556 event pairs, 234 based on Foata normal form. 16/1001 useless extension candidates. Maximal degree in co-relation 3065. Up to 576 conditions per place. [2024-06-27 21:50:07,468 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 50 selfloop transitions, 24 changer transitions 0/86 dead transitions. [2024-06-27 21:50:07,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 86 transitions, 678 flow [2024-06-27 21:50:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 21:50:07,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 21:50:07,470 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 462 flow. Second operand 8 states and 168 transitions. [2024-06-27 21:50:07,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 86 transitions, 678 flow [2024-06-27 21:50:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 86 transitions, 642 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:50:07,482 INFO L231 Difference]: Finished difference. Result has 97 places, 63 transitions, 477 flow [2024-06-27 21:50:07,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=97, PETRI_TRANSITIONS=63} [2024-06-27 21:50:07,484 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2024-06-27 21:50:07,484 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 63 transitions, 477 flow [2024-06-27 21:50:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:07,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:07,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:07,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:50:07,485 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:07,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash 88635022, now seen corresponding path program 2 times [2024-06-27 21:50:07,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:07,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58590432] [2024-06-27 21:50:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58590432] [2024-06-27 21:50:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58590432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:07,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:07,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440968681] [2024-06-27 21:50:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:07,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:07,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:07,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 63 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:07,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:07,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:07,847 INFO L124 PetriNetUnfolderBase]: 456/1104 cut-off events. [2024-06-27 21:50:07,847 INFO L125 PetriNetUnfolderBase]: For 4131/4134 co-relation queries the response was YES. [2024-06-27 21:50:07,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1104 events. 456/1104 cut-off events. For 4131/4134 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8170 event pairs, 202 based on Foata normal form. 9/1053 useless extension candidates. Maximal degree in co-relation 3233. Up to 669 conditions per place. [2024-06-27 21:50:07,854 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 50 selfloop transitions, 27 changer transitions 0/89 dead transitions. [2024-06-27 21:50:07,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 707 flow [2024-06-27 21:50:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:50:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:50:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 21:50:07,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360294117647058 [2024-06-27 21:50:07,855 INFO L175 Difference]: Start difference. First operand has 97 places, 63 transitions, 477 flow. Second operand 8 states and 173 transitions. [2024-06-27 21:50:07,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 707 flow [2024-06-27 21:50:07,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 660 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:50:07,910 INFO L231 Difference]: Finished difference. Result has 99 places, 63 transitions, 487 flow [2024-06-27 21:50:07,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=487, PETRI_PLACES=99, PETRI_TRANSITIONS=63} [2024-06-27 21:50:07,910 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 63 predicate places. [2024-06-27 21:50:07,911 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 63 transitions, 487 flow [2024-06-27 21:50:07,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:07,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:07,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:07,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:50:07,911 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:07,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 354332302, now seen corresponding path program 3 times [2024-06-27 21:50:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25282724] [2024-06-27 21:50:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:08,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25282724] [2024-06-27 21:50:08,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25282724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:08,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:08,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:08,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010696591] [2024-06-27 21:50:08,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:08,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:50:08,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:50:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:50:08,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2024-06-27 21:50:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 63 transitions, 487 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:08,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2024-06-27 21:50:08,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:08,224 INFO L124 PetriNetUnfolderBase]: 449/1115 cut-off events. [2024-06-27 21:50:08,224 INFO L125 PetriNetUnfolderBase]: For 3027/3038 co-relation queries the response was YES. [2024-06-27 21:50:08,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 1115 events. 449/1115 cut-off events. For 3027/3038 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8299 event pairs, 232 based on Foata normal form. 14/1064 useless extension candidates. Maximal degree in co-relation 3131. Up to 535 conditions per place. [2024-06-27 21:50:08,232 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 56 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-27 21:50:08,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 87 transitions, 665 flow [2024-06-27 21:50:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:50:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:50:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-27 21:50:08,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634453781512605 [2024-06-27 21:50:08,233 INFO L175 Difference]: Start difference. First operand has 99 places, 63 transitions, 487 flow. Second operand 7 states and 151 transitions. [2024-06-27 21:50:08,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 87 transitions, 665 flow [2024-06-27 21:50:08,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 534 flow, removed 3 selfloop flow, removed 28 redundant places. [2024-06-27 21:50:08,240 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 350 flow [2024-06-27 21:50:08,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=350, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-06-27 21:50:08,243 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2024-06-27 21:50:08,244 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 350 flow [2024-06-27 21:50:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:08,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:50:08,244 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:08,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -307588440, now seen corresponding path program 1 times [2024-06-27 21:50:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362006427] [2024-06-27 21:50:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362006427] [2024-06-27 21:50:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362006427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:50:08,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774761445] [2024-06-27 21:50:08,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2024-06-27 21:50:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2024-06-27 21:50:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:08,445 INFO L124 PetriNetUnfolderBase]: 328/971 cut-off events. [2024-06-27 21:50:08,445 INFO L125 PetriNetUnfolderBase]: For 628/671 co-relation queries the response was YES. [2024-06-27 21:50:08,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 971 events. 328/971 cut-off events. For 628/671 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7014 event pairs, 15 based on Foata normal form. 71/986 useless extension candidates. Maximal degree in co-relation 2309. Up to 312 conditions per place. [2024-06-27 21:50:08,449 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 20 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-27 21:50:08,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 448 flow [2024-06-27 21:50:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:08,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 21:50:08,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7235294117647059 [2024-06-27 21:50:08,450 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 350 flow. Second operand 5 states and 123 transitions. [2024-06-27 21:50:08,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 448 flow [2024-06-27 21:50:08,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 411 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 21:50:08,453 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 375 flow [2024-06-27 21:50:08,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-06-27 21:50:08,456 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 41 predicate places. [2024-06-27 21:50:08,456 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 375 flow [2024-06-27 21:50:08,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:08,456 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] [2024-06-27 21:50:08,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:50:08,457 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:08,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash 425048646, now seen corresponding path program 1 times [2024-06-27 21:50:08,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:08,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711328753] [2024-06-27 21:50:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711328753] [2024-06-27 21:50:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711328753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:08,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:08,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160038811] [2024-06-27 21:50:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:08,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:50:08,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:50:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:50:08,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 34 [2024-06-27 21:50:08,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 375 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) [2024-06-27 21:50:08,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:08,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 34 [2024-06-27 21:50:08,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:08,691 INFO L124 PetriNetUnfolderBase]: 266/829 cut-off events. [2024-06-27 21:50:08,691 INFO L125 PetriNetUnfolderBase]: For 727/729 co-relation queries the response was YES. [2024-06-27 21:50:08,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 829 events. 266/829 cut-off events. For 727/729 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6120 event pairs, 110 based on Foata normal form. 29/762 useless extension candidates. Maximal degree in co-relation 2188. Up to 241 conditions per place. [2024-06-27 21:50:08,694 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 14 selfloop transitions, 3 changer transitions 35/73 dead transitions. [2024-06-27 21:50:08,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 73 transitions, 475 flow [2024-06-27 21:50:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:50:08,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:50:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-27 21:50:08,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6823529411764706 [2024-06-27 21:50:08,696 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 375 flow. Second operand 5 states and 116 transitions. [2024-06-27 21:50:08,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 73 transitions, 475 flow [2024-06-27 21:50:08,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:50:08,699 INFO L231 Difference]: Finished difference. Result has 82 places, 36 transitions, 178 flow [2024-06-27 21:50:08,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=36} [2024-06-27 21:50:08,700 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 46 predicate places. [2024-06-27 21:50:08,700 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 36 transitions, 178 flow [2024-06-27 21:50:08,700 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) [2024-06-27 21:50:08,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:08,701 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] [2024-06-27 21:50:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:50:08,701 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:08,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 363759944, now seen corresponding path program 2 times [2024-06-27 21:50:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558393298] [2024-06-27 21:50:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:50:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558393298] [2024-06-27 21:50:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558393298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:50:08,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:50:08,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:50:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870938822] [2024-06-27 21:50:08,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:50:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:50:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:50:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:50:08,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 34 [2024-06-27 21:50:08,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 36 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:08,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 34 [2024-06-27 21:50:08,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:08,904 INFO L124 PetriNetUnfolderBase]: 74/242 cut-off events. [2024-06-27 21:50:08,905 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2024-06-27 21:50:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 242 events. 74/242 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1229 event pairs, 15 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 665. Up to 99 conditions per place. [2024-06-27 21:50:08,906 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-27 21:50:08,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 40 transitions, 226 flow [2024-06-27 21:50:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:50:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:50:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:50:08,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-06-27 21:50:08,907 INFO L175 Difference]: Start difference. First operand has 82 places, 36 transitions, 178 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:50:08,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 40 transitions, 226 flow [2024-06-27 21:50:08,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 40 transitions, 187 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-27 21:50:08,909 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2024-06-27 21:50:08,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2024-06-27 21:50:08,909 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2024-06-27 21:50:08,909 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2024-06-27 21:50:08,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:08,912 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 21:50:08,913 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 21:50:08,913 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 21:50:08,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 21:50:08,916 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 21:50:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:50:08,917 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:08,920 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 21:50:08,920 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 21:50:08,924 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 21:50:08,924 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 21:50:08,927 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 09:50:08 BasicIcfg [2024-06-27 21:50:08,927 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 21:50:08,928 INFO L158 Benchmark]: Toolchain (without parser) took 10840.87ms. Allocated memory was 165.7MB in the beginning and 312.5MB in the end (delta: 146.8MB). Free memory was 114.6MB in the beginning and 196.0MB in the end (delta: -81.4MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,928 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:50:08,928 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 165.7MB. Free memory is still 117.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:50:08,928 INFO L158 Benchmark]: CACSL2BoogieTranslator took 644.34ms. Allocated memory is still 165.7MB. Free memory was 113.9MB in the beginning and 126.2MB in the end (delta: -12.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,929 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.00ms. Allocated memory is still 165.7MB. Free memory was 126.2MB in the beginning and 124.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,929 INFO L158 Benchmark]: Boogie Preprocessor took 45.40ms. Allocated memory is still 165.7MB. Free memory was 124.3MB in the beginning and 122.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,929 INFO L158 Benchmark]: RCFGBuilder took 387.89ms. Allocated memory is still 165.7MB. Free memory was 122.1MB in the beginning and 102.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,930 INFO L158 Benchmark]: TraceAbstraction took 9702.80ms. Allocated memory was 165.7MB in the beginning and 312.5MB in the end (delta: 146.8MB). Free memory was 101.9MB in the beginning and 196.0MB in the end (delta: -94.1MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. [2024-06-27 21:50:08,934 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 100.7MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 165.7MB. Free memory is still 117.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 644.34ms. Allocated memory is still 165.7MB. Free memory was 113.9MB in the beginning and 126.2MB in the end (delta: -12.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.00ms. Allocated memory is still 165.7MB. Free memory was 126.2MB in the beginning and 124.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.40ms. Allocated memory is still 165.7MB. Free memory was 124.3MB in the beginning and 122.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 387.89ms. Allocated memory is still 165.7MB. Free memory was 122.1MB in the beginning and 102.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9702.80ms. Allocated memory was 165.7MB in the beginning and 312.5MB in the end (delta: 146.8MB). Free memory was 101.9MB in the beginning and 196.0MB in the end (delta: -94.1MB). Peak memory consumption was 54.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 761]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 762]: 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, 50 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: 9.6s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1537 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1198 mSDsluCounter, 454 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 265 mSDsCounter, 123 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4213 IncrementalHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 123 mSolverCounterUnsat, 189 mSDtfsCounter, 4213 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 180 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=487occurred in iteration=27, InterpolantAutomatonStates: 185, 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, 3.4s InterpolantComputationTime, 454 NumberOfCodeBlocks, 454 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 423 ConstructedInterpolants, 0 QuantifiedInterpolants, 2881 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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! [2024-06-27 21:50:08,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE