./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe036.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe036.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/safe036.i ./goblint.2024-06-19_11-23-25.files/protection/safe036.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 17:58:19,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:58:19,992 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:58:19,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:58:19,999 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:58:20,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:58:20,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:58:20,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:58:20,023 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:58:20,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:58:20,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:58:20,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:58:20,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:58:20,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:58:20,028 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:58:20,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:58:20,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:58:20,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:58:20,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:58:20,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:58:20,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:58:20,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:58:20,031 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:58:20,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:58:20,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:58:20,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:58:20,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:58:20,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:58:20,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:58:20,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:58:20,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:58:20,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:58:20,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 17:58:20,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:58:20,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:58:20,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:58:20,249 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:58:20,249 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:58:20,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 17:58:21,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:58:21,414 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:58:21,414 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2024-06-27 17:58:21,432 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91cb4c99/608a667f524149e4a29ef24461786119/FLAG3b223edb9 [2024-06-27 17:58:21,444 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b91cb4c99/608a667f524149e4a29ef24461786119 [2024-06-27 17:58:21,446 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 17:58:21,447 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 17:58:21,448 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe036.yml/witness.yml [2024-06-27 17:58:21,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:58:21,533 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 17:58:21,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:58:21,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:58:21,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:58:21,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:58:21" (1/2) ... [2024-06-27 17:58:21,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7619ceb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:21, skipping insertion in model container [2024-06-27 17:58:21,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:58:21" (1/2) ... [2024-06-27 17:58:21,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3170ad11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:58:21, skipping insertion in model container [2024-06-27 17:58:21,542 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:21" (2/2) ... [2024-06-27 17:58:21,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7619ceb0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:58:21, skipping insertion in model container [2024-06-27 17:58:21,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:21" (2/2) ... [2024-06-27 17:58:21,545 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 17:58:21,576 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 17:58:21,577 INFO L97 edCorrectnessWitness]: Location invariant before [L767-L767] ((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:58:21,578 INFO L97 edCorrectnessWitness]: Location invariant before [L768-L768] ((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 17:58:21,578 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 17:58:21,578 INFO L106 edCorrectnessWitness]: ghost_update [L765-L765] multithreaded = 1; [2024-06-27 17:58:21,623 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:58:21,809 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/safe036.i[941,954] [2024-06-27 17:58:21,942 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:58:21,950 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 17:58:21,978 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/safe036.i[941,954] Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 17:58:22,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:58:22,033 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:58:22,033 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 05:58:22 WrapperNode [2024-06-27 17:58:22,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:58:22,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:58:22,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:58:22,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:58:22,040 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,049 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,063 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-06-27 17:58:22,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:58:22,064 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:58:22,064 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:58:22,064 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:58:22,071 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,072 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,073 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,082 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 17:58:22,082 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,085 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,088 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,090 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,091 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,092 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,093 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:58:22,094 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:58:22,094 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:58:22,094 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:58:22,095 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 05:58:22" (1/1) ... [2024-06-27 17:58:22,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:58:22,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:58:22,118 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 17:58:22,137 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 17:58:22,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:58:22,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:58:22,156 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 17:58:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 17:58:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 17:58:22,157 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 17:58:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:58:22,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:58:22,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:58:22,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:58:22,159 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 17:58:22,285 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:58:22,287 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:58:22,451 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:58:22,451 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:58:22,493 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:58:22,494 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 17:58:22,494 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:58:22 BoogieIcfgContainer [2024-06-27 17:58:22,494 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:58:22,496 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:58:22,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:58:22,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:58:22,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:58:21" (1/4) ... [2024-06-27 17:58:22,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6048c2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:58:22, skipping insertion in model container [2024-06-27 17:58:22,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 05:58:21" (2/4) ... [2024-06-27 17:58:22,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6048c2d3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:58:22, skipping insertion in model container [2024-06-27 17:58:22,499 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 05:58:22" (3/4) ... [2024-06-27 17:58:22,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6048c2d3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 05:58:22, skipping insertion in model container [2024-06-27 17:58:22,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:58:22" (4/4) ... [2024-06-27 17:58:22,500 INFO L112 eAbstractionObserver]: Analyzing ICFG safe036.i [2024-06-27 17:58:22,512 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:58:22,512 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 17:58:22,513 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:58:22,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 17:58:22,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 17:58:22,575 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-06-27 17:58:22,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:58:22,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 34 events. 1/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-06-27 17:58:22,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 80 flow [2024-06-27 17:58:22,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 68 flow [2024-06-27 17:58:22,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:58:22,599 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;@37b2dee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:58:22,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:58:22,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:58:22,602 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 17:58:22,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:58:22,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:22,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 17:58:22,603 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 17:58:22,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash 182021349, now seen corresponding path program 1 times [2024-06-27 17:58:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794305122] [2024-06-27 17:58:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:22,938 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 17:58:22,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:22,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794305122] [2024-06-27 17:58:22,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794305122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:22,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:22,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 17:58:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143659330] [2024-06-27 17:58:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:58:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:58:22,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:58:22,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 36 [2024-06-27 17:58:22,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:22,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:22,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 36 [2024-06-27 17:58:22,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,079 INFO L124 PetriNetUnfolderBase]: 114/275 cut-off events. [2024-06-27 17:58:23,080 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 17:58:23,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 275 events. 114/275 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1316 event pairs, 45 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 487. Up to 202 conditions per place. [2024-06-27 17:58:23,082 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 21 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-06-27 17:58:23,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 135 flow [2024-06-27 17:58:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:58:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:58:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 17:58:23,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2024-06-27 17:58:23,092 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 68 flow. Second operand 3 states and 80 transitions. [2024-06-27 17:58:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 135 flow [2024-06-27 17:58:23,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:23,097 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 87 flow [2024-06-27 17:58:23,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-06-27 17:58:23,101 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-06-27 17:58:23,101 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 87 flow [2024-06-27 17:58:23,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:58:23,103 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 17:58:23,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1170967398, now seen corresponding path program 1 times [2024-06-27 17:58:23,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274254619] [2024-06-27 17:58:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:23,192 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 17:58:23,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:23,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274254619] [2024-06-27 17:58:23,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274254619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:23,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:23,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:58:23,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144254363] [2024-06-27 17:58:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:23,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:58:23,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:23,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:58:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:58:23,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-27 17:58:23,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:23,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-27 17:58:23,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,292 INFO L124 PetriNetUnfolderBase]: 142/311 cut-off events. [2024-06-27 17:58:23,292 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-27 17:58:23,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 311 events. 142/311 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1437 event pairs, 46 based on Foata normal form. 2/310 useless extension candidates. Maximal degree in co-relation 645. Up to 235 conditions per place. [2024-06-27 17:58:23,298 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 28 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-06-27 17:58:23,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 187 flow [2024-06-27 17:58:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 17:58:23,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-06-27 17:58:23,300 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 87 flow. Second operand 4 states and 103 transitions. [2024-06-27 17:58:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 187 flow [2024-06-27 17:58:23,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:23,305 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 111 flow [2024-06-27 17:58:23,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 17:58:23,305 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-06-27 17:58:23,306 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 111 flow [2024-06-27 17:58:23,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:58:23,307 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:23,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1293567237, now seen corresponding path program 1 times [2024-06-27 17:58:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283800734] [2024-06-27 17:58:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:23,400 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 17:58:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283800734] [2024-06-27 17:58:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283800734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:58:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375334045] [2024-06-27 17:58:23,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:23,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:58:23,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:58:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:58:23,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2024-06-27 17:58:23,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 17:58:23,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:23,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2024-06-27 17:58:23,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,479 INFO L124 PetriNetUnfolderBase]: 141/314 cut-off events. [2024-06-27 17:58:23,479 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2024-06-27 17:58:23,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 314 events. 141/314 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1514 event pairs, 49 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 719. Up to 241 conditions per place. [2024-06-27 17:58:23,481 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 27 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-06-27 17:58:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 201 flow [2024-06-27 17:58:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 17:58:23,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 17:58:23,486 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 111 flow. Second operand 4 states and 99 transitions. [2024-06-27 17:58:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 201 flow [2024-06-27 17:58:23,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 192 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:23,489 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 127 flow [2024-06-27 17:58:23,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 17:58:23,490 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-06-27 17:58:23,490 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 127 flow [2024-06-27 17:58:23,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 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 17:58:23,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:58:23,491 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 17:58:23,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash -296419646, now seen corresponding path program 1 times [2024-06-27 17:58:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045965016] [2024-06-27 17:58:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:23,626 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 17:58:23,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:23,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045965016] [2024-06-27 17:58:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045965016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:23,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783266198] [2024-06-27 17:58:23,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:23,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:23,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:23,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:23,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:23,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,808 INFO L124 PetriNetUnfolderBase]: 175/406 cut-off events. [2024-06-27 17:58:23,808 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-06-27 17:58:23,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 406 events. 175/406 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1992 event pairs, 43 based on Foata normal form. 4/404 useless extension candidates. Maximal degree in co-relation 926. Up to 250 conditions per place. [2024-06-27 17:58:23,810 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 39 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 17:58:23,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 271 flow [2024-06-27 17:58:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 17:58:23,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-27 17:58:23,812 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 127 flow. Second operand 6 states and 143 transitions. [2024-06-27 17:58:23,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 271 flow [2024-06-27 17:58:23,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 262 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:23,816 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 143 flow [2024-06-27 17:58:23,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-27 17:58:23,817 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2024-06-27 17:58:23,817 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 143 flow [2024-06-27 17:58:23,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:58:23,818 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 17:58:23,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1512600894, now seen corresponding path program 1 times [2024-06-27 17:58:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752711479] [2024-06-27 17:58:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:23,905 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 17:58:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752711479] [2024-06-27 17:58:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752711479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:23,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:23,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:23,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223257090] [2024-06-27 17:58:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:23,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:23,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 17:58:23,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:23,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:23,979 INFO L124 PetriNetUnfolderBase]: 182/390 cut-off events. [2024-06-27 17:58:23,979 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-06-27 17:58:23,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 390 events. 182/390 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1940 event pairs, 35 based on Foata normal form. 1/389 useless extension candidates. Maximal degree in co-relation 996. Up to 278 conditions per place. [2024-06-27 17:58:23,982 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 37 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-27 17:58:23,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 299 flow [2024-06-27 17:58:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 17:58:23,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-06-27 17:58:23,983 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 143 flow. Second operand 5 states and 122 transitions. [2024-06-27 17:58:23,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 299 flow [2024-06-27 17:58:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 283 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 17:58:23,987 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 180 flow [2024-06-27 17:58:23,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 17:58:23,991 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-06-27 17:58:23,991 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 180 flow [2024-06-27 17:58:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 17:58:23,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:23,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:23,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:58:23,993 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 17:58:23,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1499678544, now seen corresponding path program 2 times [2024-06-27 17:58:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:23,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174516249] [2024-06-27 17:58:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,056 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 17:58:24,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174516249] [2024-06-27 17:58:24,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174516249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:24,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778528592] [2024-06-27 17:58:24,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:24,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 17:58:24,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,127 INFO L124 PetriNetUnfolderBase]: 180/399 cut-off events. [2024-06-27 17:58:24,127 INFO L125 PetriNetUnfolderBase]: For 516/516 co-relation queries the response was YES. [2024-06-27 17:58:24,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 399 events. 180/399 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1982 event pairs, 42 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 1070. Up to 276 conditions per place. [2024-06-27 17:58:24,129 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 33 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-27 17:58:24,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 292 flow [2024-06-27 17:58:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 17:58:24,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6555555555555556 [2024-06-27 17:58:24,130 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 180 flow. Second operand 5 states and 118 transitions. [2024-06-27 17:58:24,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 292 flow [2024-06-27 17:58:24,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 288 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 17:58:24,132 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 201 flow [2024-06-27 17:58:24,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-06-27 17:58:24,132 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-06-27 17:58:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 201 flow [2024-06-27 17:58:24,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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 17:58:24,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:58:24,133 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 17:58:24,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash -823354951, now seen corresponding path program 1 times [2024-06-27 17:58:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295190722] [2024-06-27 17:58:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,224 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 17:58:24,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295190722] [2024-06-27 17:58:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295190722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982248738] [2024-06-27 17:58:24,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:24,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,338 INFO L124 PetriNetUnfolderBase]: 187/403 cut-off events. [2024-06-27 17:58:24,338 INFO L125 PetriNetUnfolderBase]: For 661/661 co-relation queries the response was YES. [2024-06-27 17:58:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 403 events. 187/403 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2013 event pairs, 39 based on Foata normal form. 1/401 useless extension candidates. Maximal degree in co-relation 1138. Up to 288 conditions per place. [2024-06-27 17:58:24,341 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 45 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-27 17:58:24,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 365 flow [2024-06-27 17:58:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 17:58:24,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6620370370370371 [2024-06-27 17:58:24,342 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 201 flow. Second operand 6 states and 143 transitions. [2024-06-27 17:58:24,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 365 flow [2024-06-27 17:58:24,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 343 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:24,345 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 214 flow [2024-06-27 17:58:24,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-06-27 17:58:24,346 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-06-27 17:58:24,347 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 214 flow [2024-06-27 17:58:24,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:58:24,347 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 17:58:24,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2032596261, now seen corresponding path program 2 times [2024-06-27 17:58:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533328176] [2024-06-27 17:58:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,436 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 17:58:24,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533328176] [2024-06-27 17:58:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533328176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041613380] [2024-06-27 17:58:24,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:24,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,520 INFO L124 PetriNetUnfolderBase]: 194/417 cut-off events. [2024-06-27 17:58:24,520 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2024-06-27 17:58:24,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 417 events. 194/417 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2102 event pairs, 34 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1227. Up to 263 conditions per place. [2024-06-27 17:58:24,523 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 40 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 17:58:24,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 406 flow [2024-06-27 17:58:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 17:58:24,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-06-27 17:58:24,524 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 214 flow. Second operand 6 states and 145 transitions. [2024-06-27 17:58:24,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 406 flow [2024-06-27 17:58:24,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 387 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:24,528 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 260 flow [2024-06-27 17:58:24,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-06-27 17:58:24,529 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2024-06-27 17:58:24,529 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 260 flow [2024-06-27 17:58:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 17:58:24,531 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 17:58:24,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2027947687, now seen corresponding path program 1 times [2024-06-27 17:58:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359780709] [2024-06-27 17:58:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,603 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 17:58:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359780709] [2024-06-27 17:58:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359780709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209543678] [2024-06-27 17:58:24,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:24,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:24,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:24,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,692 INFO L124 PetriNetUnfolderBase]: 201/439 cut-off events. [2024-06-27 17:58:24,692 INFO L125 PetriNetUnfolderBase]: For 1068/1068 co-relation queries the response was YES. [2024-06-27 17:58:24,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1364 conditions, 439 events. 201/439 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2280 event pairs, 38 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 1341. Up to 283 conditions per place. [2024-06-27 17:58:24,694 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 46 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-27 17:58:24,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 454 flow [2024-06-27 17:58:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 17:58:24,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6712962962962963 [2024-06-27 17:58:24,695 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 260 flow. Second operand 6 states and 145 transitions. [2024-06-27 17:58:24,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 454 flow [2024-06-27 17:58:24,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 436 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:24,698 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 295 flow [2024-06-27 17:58:24,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-06-27 17:58:24,699 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-06-27 17:58:24,699 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 295 flow [2024-06-27 17:58:24,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 17:58:24,700 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 17:58:24,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1751728155, now seen corresponding path program 3 times [2024-06-27 17:58:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848785191] [2024-06-27 17:58:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,803 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 17:58:24,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848785191] [2024-06-27 17:58:24,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848785191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:24,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565310534] [2024-06-27 17:58:24,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:24,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:24,897 INFO L124 PetriNetUnfolderBase]: 199/434 cut-off events. [2024-06-27 17:58:24,897 INFO L125 PetriNetUnfolderBase]: For 1278/1278 co-relation queries the response was YES. [2024-06-27 17:58:24,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 434 events. 199/434 cut-off events. For 1278/1278 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2255 event pairs, 44 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1404. Up to 272 conditions per place. [2024-06-27 17:58:24,899 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 40 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 17:58:24,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 439 flow [2024-06-27 17:58:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 17:58:24,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 17:58:24,901 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 295 flow. Second operand 6 states and 141 transitions. [2024-06-27 17:58:24,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 439 flow [2024-06-27 17:58:24,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 423 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 17:58:24,904 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 316 flow [2024-06-27 17:58:24,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-06-27 17:58:24,905 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-06-27 17:58:24,905 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 316 flow [2024-06-27 17:58:24,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:24,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 17:58:24,906 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 17:58:24,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:24,907 INFO L85 PathProgramCache]: Analyzing trace with hash 83341657, now seen corresponding path program 2 times [2024-06-27 17:58:24,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:24,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820536450] [2024-06-27 17:58:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:24,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:24,975 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 17:58:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820536450] [2024-06-27 17:58:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820536450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:24,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:24,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188729269] [2024-06-27 17:58:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:24,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:24,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:24,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:24,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:24,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:24,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,055 INFO L124 PetriNetUnfolderBase]: 206/456 cut-off events. [2024-06-27 17:58:25,055 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2024-06-27 17:58:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 456 events. 206/456 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2395 event pairs, 42 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 1520. Up to 288 conditions per place. [2024-06-27 17:58:25,058 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 43 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-27 17:58:25,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 500 flow [2024-06-27 17:58:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 17:58:25,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2024-06-27 17:58:25,059 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 316 flow. Second operand 6 states and 142 transitions. [2024-06-27 17:58:25,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 500 flow [2024-06-27 17:58:25,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 459 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:25,064 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 324 flow [2024-06-27 17:58:25,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2024-06-27 17:58:25,064 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-06-27 17:58:25,065 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 324 flow [2024-06-27 17:58:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:25,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:25,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:25,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 17:58:25,065 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 17:58:25,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:25,065 INFO L85 PathProgramCache]: Analyzing trace with hash 83580667, now seen corresponding path program 3 times [2024-06-27 17:58:25,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:25,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80105363] [2024-06-27 17:58:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:25,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,152 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 17:58:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80105363] [2024-06-27 17:58:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80105363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779128765] [2024-06-27 17:58:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:25,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:25,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 324 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:25,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:25,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,262 INFO L124 PetriNetUnfolderBase]: 204/458 cut-off events. [2024-06-27 17:58:25,262 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-06-27 17:58:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 458 events. 204/458 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2413 event pairs, 73 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 1513. Up to 327 conditions per place. [2024-06-27 17:58:25,265 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 17:58:25,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 472 flow [2024-06-27 17:58:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 17:58:25,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342592592592593 [2024-06-27 17:58:25,266 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 324 flow. Second operand 6 states and 137 transitions. [2024-06-27 17:58:25,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 472 flow [2024-06-27 17:58:25,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 433 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:25,270 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 308 flow [2024-06-27 17:58:25,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-06-27 17:58:25,270 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-27 17:58:25,271 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 308 flow [2024-06-27 17:58:25,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:25,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:25,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:25,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 17:58:25,271 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 17:58:25,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:25,272 INFO L85 PathProgramCache]: Analyzing trace with hash 91923449, now seen corresponding path program 1 times [2024-06-27 17:58:25,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:25,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035524989] [2024-06-27 17:58:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,356 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 17:58:25,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035524989] [2024-06-27 17:58:25,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035524989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:25,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204549588] [2024-06-27 17:58:25,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:25,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:25,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:25,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:25,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:25,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,448 INFO L124 PetriNetUnfolderBase]: 201/433 cut-off events. [2024-06-27 17:58:25,448 INFO L125 PetriNetUnfolderBase]: For 1530/1530 co-relation queries the response was YES. [2024-06-27 17:58:25,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 433 events. 201/433 cut-off events. For 1530/1530 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2210 event pairs, 29 based on Foata normal form. 2/434 useless extension candidates. Maximal degree in co-relation 1435. Up to 315 conditions per place. [2024-06-27 17:58:25,451 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 51 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-27 17:58:25,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 460 flow [2024-06-27 17:58:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 17:58:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:58:25,452 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 308 flow. Second operand 6 states and 136 transitions. [2024-06-27 17:58:25,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 460 flow [2024-06-27 17:58:25,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 423 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:25,456 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 291 flow [2024-06-27 17:58:25,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-06-27 17:58:25,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-06-27 17:58:25,458 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 291 flow [2024-06-27 17:58:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 17:58:25,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:25,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 17:58:25,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:25,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash 295992665, now seen corresponding path program 1 times [2024-06-27 17:58:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:25,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739089708] [2024-06-27 17:58:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,535 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 17:58:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739089708] [2024-06-27 17:58:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739089708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:58:25,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660858447] [2024-06-27 17:58:25,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:58:25,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:58:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:58:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-27 17:58:25,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 17:58:25,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-27 17:58:25,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,585 INFO L124 PetriNetUnfolderBase]: 106/304 cut-off events. [2024-06-27 17:58:25,586 INFO L125 PetriNetUnfolderBase]: For 712/713 co-relation queries the response was YES. [2024-06-27 17:58:25,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 839 conditions, 304 events. 106/304 cut-off events. For 712/713 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1479 event pairs, 9 based on Foata normal form. 16/291 useless extension candidates. Maximal degree in co-relation 811. Up to 103 conditions per place. [2024-06-27 17:58:25,587 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 20 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-27 17:58:25,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 399 flow [2024-06-27 17:58:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:58:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:58:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-27 17:58:25,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7638888888888888 [2024-06-27 17:58:25,588 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 291 flow. Second operand 4 states and 110 transitions. [2024-06-27 17:58:25,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 399 flow [2024-06-27 17:58:25,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 381 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:25,591 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 345 flow [2024-06-27 17:58:25,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=345, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-06-27 17:58:25,592 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2024-06-27 17:58:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 345 flow [2024-06-27 17:58:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 17:58:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 17:58:25,592 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 17:58:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1277360384, now seen corresponding path program 1 times [2024-06-27 17:58:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330849819] [2024-06-27 17:58:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,677 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 17:58:25,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330849819] [2024-06-27 17:58:25,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330849819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:25,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079589003] [2024-06-27 17:58:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:25,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:25,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:25,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:25,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:25,789 INFO L124 PetriNetUnfolderBase]: 172/401 cut-off events. [2024-06-27 17:58:25,789 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-06-27 17:58:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 401 events. 172/401 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2000 event pairs, 59 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 1395. Up to 279 conditions per place. [2024-06-27 17:58:25,791 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 53 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 17:58:25,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 523 flow [2024-06-27 17:58:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 17:58:25,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 17:58:25,793 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 345 flow. Second operand 7 states and 156 transitions. [2024-06-27 17:58:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 523 flow [2024-06-27 17:58:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 521 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:58:25,797 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 377 flow [2024-06-27 17:58:25,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-06-27 17:58:25,798 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2024-06-27 17:58:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 377 flow [2024-06-27 17:58:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 17:58:25,799 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 17:58:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1660179778, now seen corresponding path program 2 times [2024-06-27 17:58:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:25,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423898720] [2024-06-27 17:58:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:25,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:25,891 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 17:58:25,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423898720] [2024-06-27 17:58:25,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423898720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:25,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:25,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478948411] [2024-06-27 17:58:25,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:25,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:25,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:25,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:25,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:25,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:25,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:25,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,032 INFO L124 PetriNetUnfolderBase]: 183/427 cut-off events. [2024-06-27 17:58:26,032 INFO L125 PetriNetUnfolderBase]: For 2273/2273 co-relation queries the response was YES. [2024-06-27 17:58:26,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 427 events. 183/427 cut-off events. For 2273/2273 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2188 event pairs, 20 based on Foata normal form. 2/406 useless extension candidates. Maximal degree in co-relation 1554. Up to 253 conditions per place. [2024-06-27 17:58:26,034 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 56 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-27 17:58:26,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 579 flow [2024-06-27 17:58:26,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:26,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 17:58:26,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-27 17:58:26,035 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 377 flow. Second operand 8 states and 177 transitions. [2024-06-27 17:58:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 579 flow [2024-06-27 17:58:26,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 555 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:26,040 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 393 flow [2024-06-27 17:58:26,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=393, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-06-27 17:58:26,041 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2024-06-27 17:58:26,041 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 393 flow [2024-06-27 17:58:26,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 17:58:26,041 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 17:58:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -291939360, now seen corresponding path program 1 times [2024-06-27 17:58:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69928363] [2024-06-27 17:58:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,124 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 17:58:26,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69928363] [2024-06-27 17:58:26,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69928363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340812033] [2024-06-27 17:58:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:26,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:26,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,232 INFO L124 PetriNetUnfolderBase]: 188/436 cut-off events. [2024-06-27 17:58:26,233 INFO L125 PetriNetUnfolderBase]: For 2496/2496 co-relation queries the response was YES. [2024-06-27 17:58:26,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1658 conditions, 436 events. 188/436 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2194 event pairs, 58 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1625. Up to 318 conditions per place. [2024-06-27 17:58:26,235 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-27 17:58:26,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 575 flow [2024-06-27 17:58:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:58:26,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:58:26,237 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 393 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:58:26,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 575 flow [2024-06-27 17:58:26,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 545 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:26,242 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 416 flow [2024-06-27 17:58:26,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2024-06-27 17:58:26,243 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-06-27 17:58:26,243 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 416 flow [2024-06-27 17:58:26,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 17:58:26,244 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 17:58:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 885146106, now seen corresponding path program 3 times [2024-06-27 17:58:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748290886] [2024-06-27 17:58:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,331 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 17:58:26,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748290886] [2024-06-27 17:58:26,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748290886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478309387] [2024-06-27 17:58:26,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:26,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:26,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,454 INFO L124 PetriNetUnfolderBase]: 199/463 cut-off events. [2024-06-27 17:58:26,454 INFO L125 PetriNetUnfolderBase]: For 2902/2902 co-relation queries the response was YES. [2024-06-27 17:58:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 463 events. 199/463 cut-off events. For 2902/2902 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2393 event pairs, 61 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 1702. Up to 313 conditions per place. [2024-06-27 17:58:26,456 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 47 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-27 17:58:26,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 592 flow [2024-06-27 17:58:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 17:58:26,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 17:58:26,457 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 416 flow. Second operand 7 states and 157 transitions. [2024-06-27 17:58:26,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 592 flow [2024-06-27 17:58:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 563 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:26,464 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 439 flow [2024-06-27 17:58:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-06-27 17:58:26,464 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-06-27 17:58:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 439 flow [2024-06-27 17:58:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 17:58:26,465 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:26,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -176648190, now seen corresponding path program 2 times [2024-06-27 17:58:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466841446] [2024-06-27 17:58:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,528 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 17:58:26,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466841446] [2024-06-27 17:58:26,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466841446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861240981] [2024-06-27 17:58:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:26,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:26,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,617 INFO L124 PetriNetUnfolderBase]: 211/485 cut-off events. [2024-06-27 17:58:26,617 INFO L125 PetriNetUnfolderBase]: For 3452/3454 co-relation queries the response was YES. [2024-06-27 17:58:26,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1910 conditions, 485 events. 211/485 cut-off events. For 3452/3454 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2539 event pairs, 62 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1875. Up to 314 conditions per place. [2024-06-27 17:58:26,620 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 42 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-27 17:58:26,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 723 flow [2024-06-27 17:58:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 17:58:26,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 17:58:26,621 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 439 flow. Second operand 7 states and 161 transitions. [2024-06-27 17:58:26,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 723 flow [2024-06-27 17:58:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 681 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:26,627 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 504 flow [2024-06-27 17:58:26,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-06-27 17:58:26,627 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-27 17:58:26,627 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 504 flow [2024-06-27 17:58:26,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 17:58:26,628 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 17:58:26,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -4342816, now seen corresponding path program 3 times [2024-06-27 17:58:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899157381] [2024-06-27 17:58:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,694 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 17:58:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899157381] [2024-06-27 17:58:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899157381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109878081] [2024-06-27 17:58:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:26,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:26,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:26,786 INFO L124 PetriNetUnfolderBase]: 209/482 cut-off events. [2024-06-27 17:58:26,786 INFO L125 PetriNetUnfolderBase]: For 3515/3517 co-relation queries the response was YES. [2024-06-27 17:58:26,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 482 events. 209/482 cut-off events. For 3515/3517 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2524 event pairs, 62 based on Foata normal form. 3/452 useless extension candidates. Maximal degree in co-relation 1835. Up to 312 conditions per place. [2024-06-27 17:58:26,789 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-27 17:58:26,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 700 flow [2024-06-27 17:58:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-27 17:58:26,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 17:58:26,790 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 504 flow. Second operand 7 states and 159 transitions. [2024-06-27 17:58:26,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 700 flow [2024-06-27 17:58:26,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 627 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 17:58:26,796 INFO L231 Difference]: Finished difference. Result has 88 places, 68 transitions, 488 flow [2024-06-27 17:58:26,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=488, PETRI_PLACES=88, PETRI_TRANSITIONS=68} [2024-06-27 17:58:26,797 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-06-27 17:58:26,797 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 68 transitions, 488 flow [2024-06-27 17:58:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:26,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:26,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 17:58:26,797 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 17:58:26,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1057465368, now seen corresponding path program 1 times [2024-06-27 17:58:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:26,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339949554] [2024-06-27 17:58:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:26,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:26,871 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 17:58:26,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:26,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339949554] [2024-06-27 17:58:26,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339949554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:26,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:26,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:26,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366303705] [2024-06-27 17:58:26,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:26,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 68 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:26,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:26,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:26,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,018 INFO L124 PetriNetUnfolderBase]: 220/508 cut-off events. [2024-06-27 17:58:27,018 INFO L125 PetriNetUnfolderBase]: For 3774/3776 co-relation queries the response was YES. [2024-06-27 17:58:27,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 508 events. 220/508 cut-off events. For 3774/3776 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2718 event pairs, 64 based on Foata normal form. 4/477 useless extension candidates. Maximal degree in co-relation 1904. Up to 354 conditions per place. [2024-06-27 17:58:27,021 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 52 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-27 17:58:27,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 668 flow [2024-06-27 17:58:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-27 17:58:27,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 17:58:27,023 INFO L175 Difference]: Start difference. First operand has 88 places, 68 transitions, 488 flow. Second operand 7 states and 157 transitions. [2024-06-27 17:58:27,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 668 flow [2024-06-27 17:58:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 611 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:27,033 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 477 flow [2024-06-27 17:58:27,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2024-06-27 17:58:27,033 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2024-06-27 17:58:27,033 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 477 flow [2024-06-27 17:58:27,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 17:58:27,035 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 17:58:27,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1571365120, now seen corresponding path program 4 times [2024-06-27 17:58:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10916882] [2024-06-27 17:58:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,118 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 17:58:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10916882] [2024-06-27 17:58:27,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10916882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697317203] [2024-06-27 17:58:27,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:27,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:27,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:27,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,208 INFO L124 PetriNetUnfolderBase]: 217/499 cut-off events. [2024-06-27 17:58:27,208 INFO L125 PetriNetUnfolderBase]: For 3589/3591 co-relation queries the response was YES. [2024-06-27 17:58:27,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 499 events. 217/499 cut-off events. For 3589/3591 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2662 event pairs, 69 based on Foata normal form. 4/466 useless extension candidates. Maximal degree in co-relation 1844. Up to 343 conditions per place. [2024-06-27 17:58:27,211 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 49 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-27 17:58:27,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 637 flow [2024-06-27 17:58:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:58:27,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:58:27,212 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:58:27,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 637 flow [2024-06-27 17:58:27,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 80 transitions, 601 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:27,218 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 479 flow [2024-06-27 17:58:27,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2024-06-27 17:58:27,218 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-06-27 17:58:27,219 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 479 flow [2024-06-27 17:58:27,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 17:58:27,219 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 17:58:27,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2143533530, now seen corresponding path program 4 times [2024-06-27 17:58:27,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812449499] [2024-06-27 17:58:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,279 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 17:58:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812449499] [2024-06-27 17:58:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812449499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740086013] [2024-06-27 17:58:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:27,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:27,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,371 INFO L124 PetriNetUnfolderBase]: 229/520 cut-off events. [2024-06-27 17:58:27,371 INFO L125 PetriNetUnfolderBase]: For 4065/4067 co-relation queries the response was YES. [2024-06-27 17:58:27,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 520 events. 229/520 cut-off events. For 4065/4067 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2792 event pairs, 69 based on Foata normal form. 3/482 useless extension candidates. Maximal degree in co-relation 1981. Up to 342 conditions per place. [2024-06-27 17:58:27,375 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 40 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2024-06-27 17:58:27,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 83 transitions, 775 flow [2024-06-27 17:58:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 17:58:27,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 17:58:27,376 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 479 flow. Second operand 7 states and 158 transitions. [2024-06-27 17:58:27,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 83 transitions, 775 flow [2024-06-27 17:58:27,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 731 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:27,384 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 550 flow [2024-06-27 17:58:27,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=550, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-06-27 17:58:27,385 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2024-06-27 17:58:27,385 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 550 flow [2024-06-27 17:58:27,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 17:58:27,386 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 17:58:27,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1519681224, now seen corresponding path program 5 times [2024-06-27 17:58:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281994778] [2024-06-27 17:58:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,451 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 17:58:27,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281994778] [2024-06-27 17:58:27,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281994778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002364976] [2024-06-27 17:58:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:27,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:27,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 550 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:27,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,555 INFO L124 PetriNetUnfolderBase]: 227/517 cut-off events. [2024-06-27 17:58:27,556 INFO L125 PetriNetUnfolderBase]: For 4003/4005 co-relation queries the response was YES. [2024-06-27 17:58:27,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 517 events. 227/517 cut-off events. For 4003/4005 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2765 event pairs, 69 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 1937. Up to 340 conditions per place. [2024-06-27 17:58:27,558 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 38 selfloop transitions, 30 changer transitions 0/82 dead transitions. [2024-06-27 17:58:27,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 82 transitions, 750 flow [2024-06-27 17:58:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 17:58:27,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 17:58:27,560 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 550 flow. Second operand 7 states and 156 transitions. [2024-06-27 17:58:27,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 82 transitions, 750 flow [2024-06-27 17:58:27,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 82 transitions, 657 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:27,570 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 522 flow [2024-06-27 17:58:27,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-27 17:58:27,571 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-27 17:58:27,571 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 522 flow [2024-06-27 17:58:27,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 17:58:27,572 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 17:58:27,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash -453795204, now seen corresponding path program 6 times [2024-06-27 17:58:27,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730913595] [2024-06-27 17:58:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,640 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 17:58:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730913595] [2024-06-27 17:58:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730913595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745960027] [2024-06-27 17:58:27,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:27,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 522 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:27,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,733 INFO L124 PetriNetUnfolderBase]: 225/516 cut-off events. [2024-06-27 17:58:27,733 INFO L125 PetriNetUnfolderBase]: For 3688/3688 co-relation queries the response was YES. [2024-06-27 17:58:27,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 516 events. 225/516 cut-off events. For 3688/3688 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2726 event pairs, 61 based on Foata normal form. 1/478 useless extension candidates. Maximal degree in co-relation 1837. Up to 392 conditions per place. [2024-06-27 17:58:27,736 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 11 changer transitions 1/81 dead transitions. [2024-06-27 17:58:27,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 81 transitions, 674 flow [2024-06-27 17:58:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 17:58:27,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 17:58:27,737 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 522 flow. Second operand 7 states and 148 transitions. [2024-06-27 17:58:27,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 81 transitions, 674 flow [2024-06-27 17:58:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 81 transitions, 606 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:27,744 INFO L231 Difference]: Finished difference. Result has 97 places, 72 transitions, 477 flow [2024-06-27 17:58:27,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=97, PETRI_TRANSITIONS=72} [2024-06-27 17:58:27,745 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-27 17:58:27,745 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 72 transitions, 477 flow [2024-06-27 17:58:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 17:58:27,745 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 17:58:27,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1513006056, now seen corresponding path program 2 times [2024-06-27 17:58:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358427238] [2024-06-27 17:58:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,815 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 17:58:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358427238] [2024-06-27 17:58:27,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358427238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94546926] [2024-06-27 17:58:27,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:27,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:27,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 72 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:27,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:27,903 INFO L124 PetriNetUnfolderBase]: 205/478 cut-off events. [2024-06-27 17:58:27,903 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-06-27 17:58:27,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 478 events. 205/478 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2465 event pairs, 63 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 1617. Up to 326 conditions per place. [2024-06-27 17:58:27,906 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 54 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-27 17:58:27,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 84 transitions, 653 flow [2024-06-27 17:58:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 17:58:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:58:27,907 INFO L175 Difference]: Start difference. First operand has 97 places, 72 transitions, 477 flow. Second operand 7 states and 154 transitions. [2024-06-27 17:58:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 84 transitions, 653 flow [2024-06-27 17:58:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 579 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 17:58:27,914 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 451 flow [2024-06-27 17:58:27,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=451, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2024-06-27 17:58:27,915 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-06-27 17:58:27,915 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 451 flow [2024-06-27 17:58:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:27,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:27,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 17:58:27,915 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 17:58:27,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1866324968, now seen corresponding path program 3 times [2024-06-27 17:58:27,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:27,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863470513] [2024-06-27 17:58:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:27,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:27,988 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 17:58:27,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:27,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863470513] [2024-06-27 17:58:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863470513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:27,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:27,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:27,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618830503] [2024-06-27 17:58:27,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:28,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:28,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 451 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:28,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:28,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:28,106 INFO L124 PetriNetUnfolderBase]: 215/506 cut-off events. [2024-06-27 17:58:28,106 INFO L125 PetriNetUnfolderBase]: For 4198/4198 co-relation queries the response was YES. [2024-06-27 17:58:28,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 506 events. 215/506 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2664 event pairs, 67 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 1667. Up to 365 conditions per place. [2024-06-27 17:58:28,109 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 62 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-27 17:58:28,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 629 flow [2024-06-27 17:58:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 17:58:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 17:58:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 17:58:28,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 17:58:28,110 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 451 flow. Second operand 7 states and 150 transitions. [2024-06-27 17:58:28,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 629 flow [2024-06-27 17:58:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 85 transitions, 593 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:28,117 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 449 flow [2024-06-27 17:58:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2024-06-27 17:58:28,118 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-06-27 17:58:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 449 flow [2024-06-27 17:58:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:28,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 17:58:28,118 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 17:58:28,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash -453487746, now seen corresponding path program 4 times [2024-06-27 17:58:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221730056] [2024-06-27 17:58:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,190 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 17:58:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221730056] [2024-06-27 17:58:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221730056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 17:58:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849523] [2024-06-27 17:58:28,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 17:58:28,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 17:58:28,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 17:58:28,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:28,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:28,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:28,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:28,297 INFO L124 PetriNetUnfolderBase]: 212/501 cut-off events. [2024-06-27 17:58:28,297 INFO L125 PetriNetUnfolderBase]: For 3829/3829 co-relation queries the response was YES. [2024-06-27 17:58:28,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 501 events. 212/501 cut-off events. For 3829/3829 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2629 event pairs, 58 based on Foata normal form. 2/482 useless extension candidates. Maximal degree in co-relation 1597. Up to 330 conditions per place. [2024-06-27 17:58:28,300 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 64 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-06-27 17:58:28,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 637 flow [2024-06-27 17:58:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 17:58:28,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 17:58:28,301 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 449 flow. Second operand 8 states and 171 transitions. [2024-06-27 17:58:28,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 637 flow [2024-06-27 17:58:28,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 89 transitions, 613 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:28,308 INFO L231 Difference]: Finished difference. Result has 100 places, 74 transitions, 453 flow [2024-06-27 17:58:28,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=453, PETRI_PLACES=100, PETRI_TRANSITIONS=74} [2024-06-27 17:58:28,308 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2024-06-27 17:58:28,309 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 74 transitions, 453 flow [2024-06-27 17:58:28,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 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 17:58:28,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:28,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:28,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 17:58:28,309 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:28,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1649281769, now seen corresponding path program 1 times [2024-06-27 17:58:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:28,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151382774] [2024-06-27 17:58:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,384 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 17:58:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151382774] [2024-06-27 17:58:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151382774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033077170] [2024-06-27 17:58:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:28,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:28,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 74 transitions, 453 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:28,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:28,550 INFO L124 PetriNetUnfolderBase]: 276/651 cut-off events. [2024-06-27 17:58:28,551 INFO L125 PetriNetUnfolderBase]: For 8634/8634 co-relation queries the response was YES. [2024-06-27 17:58:28,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 651 events. 276/651 cut-off events. For 8634/8634 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3817 event pairs, 86 based on Foata normal form. 6/630 useless extension candidates. Maximal degree in co-relation 2199. Up to 283 conditions per place. [2024-06-27 17:58:28,554 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 80 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-27 17:58:28,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 783 flow [2024-06-27 17:58:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-27 17:58:28,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:58:28,555 INFO L175 Difference]: Start difference. First operand has 100 places, 74 transitions, 453 flow. Second operand 9 states and 204 transitions. [2024-06-27 17:58:28,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 783 flow [2024-06-27 17:58:28,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 753 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:28,567 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 450 flow [2024-06-27 17:58:28,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-27 17:58:28,568 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-27 17:58:28,568 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 450 flow [2024-06-27 17:58:28,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:28,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:28,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:28,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 17:58:28,569 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1886357925, now seen corresponding path program 2 times [2024-06-27 17:58:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:28,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466931171] [2024-06-27 17:58:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,658 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 17:58:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466931171] [2024-06-27 17:58:28,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466931171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108028192] [2024-06-27 17:58:28,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:28,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:28,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:28,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:28,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:28,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:28,825 INFO L124 PetriNetUnfolderBase]: 298/708 cut-off events. [2024-06-27 17:58:28,825 INFO L125 PetriNetUnfolderBase]: For 9239/9239 co-relation queries the response was YES. [2024-06-27 17:58:28,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2366 conditions, 708 events. 298/708 cut-off events. For 9239/9239 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4222 event pairs, 116 based on Foata normal form. 6/683 useless extension candidates. Maximal degree in co-relation 2324. Up to 379 conditions per place. [2024-06-27 17:58:28,831 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 77 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-06-27 17:58:28,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 764 flow [2024-06-27 17:58:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 17:58:28,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 17:58:28,833 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 450 flow. Second operand 8 states and 183 transitions. [2024-06-27 17:58:28,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 764 flow [2024-06-27 17:58:28,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 724 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 17:58:28,847 INFO L231 Difference]: Finished difference. Result has 103 places, 74 transitions, 439 flow [2024-06-27 17:58:28,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2024-06-27 17:58:28,848 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-06-27 17:58:28,848 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 439 flow [2024-06-27 17:58:28,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:28,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:28,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:28,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 17:58:28,849 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:28,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1881596325, now seen corresponding path program 3 times [2024-06-27 17:58:28,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003702968] [2024-06-27 17:58:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:28,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:28,931 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 17:58:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:28,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003702968] [2024-06-27 17:58:28,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003702968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:28,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:28,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773965923] [2024-06-27 17:58:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:28,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:28,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:28,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:28,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:28,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:28,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:28,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,069 INFO L124 PetriNetUnfolderBase]: 288/680 cut-off events. [2024-06-27 17:58:29,069 INFO L125 PetriNetUnfolderBase]: For 7289/7289 co-relation queries the response was YES. [2024-06-27 17:58:29,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 680 events. 288/680 cut-off events. For 7289/7289 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4060 event pairs, 128 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 1993. Up to 445 conditions per place. [2024-06-27 17:58:29,075 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 71 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 17:58:29,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 95 transitions, 663 flow [2024-06-27 17:58:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-27 17:58:29,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-27 17:58:29,076 INFO L175 Difference]: Start difference. First operand has 103 places, 74 transitions, 439 flow. Second operand 8 states and 177 transitions. [2024-06-27 17:58:29,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 95 transitions, 663 flow [2024-06-27 17:58:29,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 95 transitions, 642 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:29,088 INFO L231 Difference]: Finished difference. Result has 105 places, 74 transitions, 444 flow [2024-06-27 17:58:29,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=105, PETRI_TRANSITIONS=74} [2024-06-27 17:58:29,088 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 67 predicate places. [2024-06-27 17:58:29,088 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 74 transitions, 444 flow [2024-06-27 17:58:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 17:58:29,089 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:29,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash 226683065, now seen corresponding path program 4 times [2024-06-27 17:58:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524658312] [2024-06-27 17:58:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:29,163 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 17:58:29,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524658312] [2024-06-27 17:58:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524658312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:29,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:29,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589430529] [2024-06-27 17:58:29,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:29,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:29,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:29,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 74 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:29,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,346 INFO L124 PetriNetUnfolderBase]: 320/757 cut-off events. [2024-06-27 17:58:29,346 INFO L125 PetriNetUnfolderBase]: For 7799/7799 co-relation queries the response was YES. [2024-06-27 17:58:29,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 757 events. 320/757 cut-off events. For 7799/7799 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4691 event pairs, 156 based on Foata normal form. 8/728 useless extension candidates. Maximal degree in co-relation 2192. Up to 467 conditions per place. [2024-06-27 17:58:29,350 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 50 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-27 17:58:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 654 flow [2024-06-27 17:58:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 17:58:29,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-06-27 17:58:29,352 INFO L175 Difference]: Start difference. First operand has 105 places, 74 transitions, 444 flow. Second operand 8 states and 182 transitions. [2024-06-27 17:58:29,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 654 flow [2024-06-27 17:58:29,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 92 transitions, 634 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:29,364 INFO L231 Difference]: Finished difference. Result has 107 places, 74 transitions, 486 flow [2024-06-27 17:58:29,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=107, PETRI_TRANSITIONS=74} [2024-06-27 17:58:29,365 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2024-06-27 17:58:29,366 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 74 transitions, 486 flow [2024-06-27 17:58:29,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 17:58:29,366 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:29,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1919655845, now seen corresponding path program 5 times [2024-06-27 17:58:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121339704] [2024-06-27 17:58:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:29,439 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 17:58:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:29,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121339704] [2024-06-27 17:58:29,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121339704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:29,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:29,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925605494] [2024-06-27 17:58:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:29,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:29,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:29,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:29,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,600 INFO L124 PetriNetUnfolderBase]: 384/913 cut-off events. [2024-06-27 17:58:29,600 INFO L125 PetriNetUnfolderBase]: For 11212/11215 co-relation queries the response was YES. [2024-06-27 17:58:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2893 conditions, 913 events. 384/913 cut-off events. For 11212/11215 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6008 event pairs, 188 based on Foata normal form. 6/875 useless extension candidates. Maximal degree in co-relation 2849. Up to 443 conditions per place. [2024-06-27 17:58:29,604 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 56 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-27 17:58:29,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 98 transitions, 788 flow [2024-06-27 17:58:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 17:58:29,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493055555555556 [2024-06-27 17:58:29,605 INFO L175 Difference]: Start difference. First operand has 107 places, 74 transitions, 486 flow. Second operand 8 states and 187 transitions. [2024-06-27 17:58:29,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 98 transitions, 788 flow [2024-06-27 17:58:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 98 transitions, 732 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:29,619 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 491 flow [2024-06-27 17:58:29,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2024-06-27 17:58:29,620 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2024-06-27 17:58:29,620 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 491 flow [2024-06-27 17:58:29,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 17:58:29,621 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:29,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1691577065, now seen corresponding path program 6 times [2024-06-27 17:58:29,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898914648] [2024-06-27 17:58:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:58:29,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:29,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898914648] [2024-06-27 17:58:29,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898914648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:29,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:29,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305163674] [2024-06-27 17:58:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:29,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:29,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:29,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 491 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:29,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:29,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:29,839 INFO L124 PetriNetUnfolderBase]: 374/885 cut-off events. [2024-06-27 17:58:29,839 INFO L125 PetriNetUnfolderBase]: For 8893/8896 co-relation queries the response was YES. [2024-06-27 17:58:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 885 events. 374/885 cut-off events. For 8893/8896 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5848 event pairs, 200 based on Foata normal form. 8/848 useless extension candidates. Maximal degree in co-relation 2563. Up to 577 conditions per place. [2024-06-27 17:58:29,843 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 49 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-27 17:58:29,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 92 transitions, 701 flow [2024-06-27 17:58:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 17:58:29,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6284722222222222 [2024-06-27 17:58:29,845 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 491 flow. Second operand 8 states and 181 transitions. [2024-06-27 17:58:29,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 92 transitions, 701 flow [2024-06-27 17:58:29,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 92 transitions, 644 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:29,872 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 498 flow [2024-06-27 17:58:29,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2024-06-27 17:58:29,872 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2024-06-27 17:58:29,872 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 498 flow [2024-06-27 17:58:29,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:29,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:29,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 17:58:29,873 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:29,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1691331111, now seen corresponding path program 1 times [2024-06-27 17:58:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731208464] [2024-06-27 17:58:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:29,940 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 17:58:29,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731208464] [2024-06-27 17:58:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731208464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:29,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178135466] [2024-06-27 17:58:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:29,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:29,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:29,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:29,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:29,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:29,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:30,099 INFO L124 PetriNetUnfolderBase]: 396/948 cut-off events. [2024-06-27 17:58:30,099 INFO L125 PetriNetUnfolderBase]: For 8289/8295 co-relation queries the response was YES. [2024-06-27 17:58:30,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 948 events. 396/948 cut-off events. For 8289/8295 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6402 event pairs, 202 based on Foata normal form. 6/905 useless extension candidates. Maximal degree in co-relation 2714. Up to 421 conditions per place. [2024-06-27 17:58:30,104 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 54 selfloop transitions, 30 changer transitions 0/97 dead transitions. [2024-06-27 17:58:30,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 736 flow [2024-06-27 17:58:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:30,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 17:58:30,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-06-27 17:58:30,105 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 498 flow. Second operand 8 states and 185 transitions. [2024-06-27 17:58:30,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 736 flow [2024-06-27 17:58:30,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 97 transitions, 678 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:30,119 INFO L231 Difference]: Finished difference. Result has 113 places, 74 transitions, 503 flow [2024-06-27 17:58:30,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=503, PETRI_PLACES=113, PETRI_TRANSITIONS=74} [2024-06-27 17:58:30,120 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2024-06-27 17:58:30,120 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 74 transitions, 503 flow [2024-06-27 17:58:30,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:30,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 17:58:30,121 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:30,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 323892729, now seen corresponding path program 7 times [2024-06-27 17:58:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:30,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833222745] [2024-06-27 17:58:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:30,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,198 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 17:58:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833222745] [2024-06-27 17:58:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833222745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474446114] [2024-06-27 17:58:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:30,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:30,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 74 transitions, 503 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:30,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:30,353 INFO L124 PetriNetUnfolderBase]: 428/1009 cut-off events. [2024-06-27 17:58:30,353 INFO L125 PetriNetUnfolderBase]: For 10099/10105 co-relation queries the response was YES. [2024-06-27 17:58:30,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1009 events. 428/1009 cut-off events. For 10099/10105 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7026 event pairs, 250 based on Foata normal form. 8/962 useless extension candidates. Maximal degree in co-relation 2905. Up to 687 conditions per place. [2024-06-27 17:58:30,358 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 47 selfloop transitions, 29 changer transitions 0/89 dead transitions. [2024-06-27 17:58:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 89 transitions, 699 flow [2024-06-27 17:58:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 17:58:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6215277777777778 [2024-06-27 17:58:30,359 INFO L175 Difference]: Start difference. First operand has 113 places, 74 transitions, 503 flow. Second operand 8 states and 179 transitions. [2024-06-27 17:58:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 89 transitions, 699 flow [2024-06-27 17:58:30,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 89 transitions, 640 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:30,375 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 506 flow [2024-06-27 17:58:30,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=506, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-06-27 17:58:30,375 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2024-06-27 17:58:30,376 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 506 flow [2024-06-27 17:58:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:30,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:30,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 17:58:30,376 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:30,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash -124742377, now seen corresponding path program 8 times [2024-06-27 17:58:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:30,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906115848] [2024-06-27 17:58:30,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:30,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,446 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 17:58:30,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906115848] [2024-06-27 17:58:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906115848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103876635] [2024-06-27 17:58:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:30,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:30,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:30,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:30,590 INFO L124 PetriNetUnfolderBase]: 460/1086 cut-off events. [2024-06-27 17:58:30,590 INFO L125 PetriNetUnfolderBase]: For 10685/10691 co-relation queries the response was YES. [2024-06-27 17:58:30,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1086 events. 460/1086 cut-off events. For 10685/10691 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7716 event pairs, 276 based on Foata normal form. 8/1035 useless extension candidates. Maximal degree in co-relation 3099. Up to 751 conditions per place. [2024-06-27 17:58:30,595 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 46 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2024-06-27 17:58:30,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 89 transitions, 702 flow [2024-06-27 17:58:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 17:58:30,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2024-06-27 17:58:30,596 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 506 flow. Second operand 8 states and 178 transitions. [2024-06-27 17:58:30,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 89 transitions, 702 flow [2024-06-27 17:58:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 89 transitions, 646 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:30,615 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 514 flow [2024-06-27 17:58:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=514, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2024-06-27 17:58:30,615 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 79 predicate places. [2024-06-27 17:58:30,615 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 514 flow [2024-06-27 17:58:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:30,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:30,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 17:58:30,616 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:30,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash -835231, now seen corresponding path program 9 times [2024-06-27 17:58:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:30,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267926057] [2024-06-27 17:58:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,677 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 17:58:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267926057] [2024-06-27 17:58:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267926057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253222240] [2024-06-27 17:58:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:30,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:30,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:30,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:30,828 INFO L124 PetriNetUnfolderBase]: 511/1211 cut-off events. [2024-06-27 17:58:30,829 INFO L125 PetriNetUnfolderBase]: For 13894/13903 co-relation queries the response was YES. [2024-06-27 17:58:30,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 1211 events. 511/1211 cut-off events. For 13894/13903 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8785 event pairs, 299 based on Foata normal form. 6/1153 useless extension candidates. Maximal degree in co-relation 3617. Up to 636 conditions per place. [2024-06-27 17:58:30,834 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-27 17:58:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 95 transitions, 812 flow [2024-06-27 17:58:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 17:58:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 17:58:30,835 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 514 flow. Second operand 8 states and 183 transitions. [2024-06-27 17:58:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 95 transitions, 812 flow [2024-06-27 17:58:30,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 95 transitions, 754 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:30,860 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 519 flow [2024-06-27 17:58:30,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=519, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2024-06-27 17:58:30,861 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2024-06-27 17:58:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 519 flow [2024-06-27 17:58:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:30,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 17:58:30,861 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:30,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash -492329469, now seen corresponding path program 10 times [2024-06-27 17:58:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200133387] [2024-06-27 17:58:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:30,938 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 17:58:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200133387] [2024-06-27 17:58:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200133387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182876043] [2024-06-27 17:58:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:30,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:30,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:30,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:30,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:30,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:31,114 INFO L124 PetriNetUnfolderBase]: 501/1187 cut-off events. [2024-06-27 17:58:31,114 INFO L125 PetriNetUnfolderBase]: For 10569/10578 co-relation queries the response was YES. [2024-06-27 17:58:31,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 1187 events. 501/1187 cut-off events. For 10569/10578 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8578 event pairs, 303 based on Foata normal form. 8/1134 useless extension candidates. Maximal degree in co-relation 3293. Up to 892 conditions per place. [2024-06-27 17:58:31,119 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 65 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-27 17:58:31,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 89 transitions, 715 flow [2024-06-27 17:58:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:31,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 17:58:31,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 17:58:31,120 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 519 flow. Second operand 8 states and 171 transitions. [2024-06-27 17:58:31,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 89 transitions, 715 flow [2024-06-27 17:58:31,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 89 transitions, 656 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:31,134 INFO L231 Difference]: Finished difference. Result has 121 places, 74 transitions, 486 flow [2024-06-27 17:58:31,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=486, PETRI_PLACES=121, PETRI_TRANSITIONS=74} [2024-06-27 17:58:31,134 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-27 17:58:31,134 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 74 transitions, 486 flow [2024-06-27 17:58:31,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:31,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 17:58:31,134 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:31,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2123793537, now seen corresponding path program 2 times [2024-06-27 17:58:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421840996] [2024-06-27 17:58:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:31,209 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 17:58:31,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:31,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421840996] [2024-06-27 17:58:31,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421840996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:31,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:31,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497454337] [2024-06-27 17:58:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:31,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:31,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 74 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:31,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:31,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:31,383 INFO L124 PetriNetUnfolderBase]: 523/1237 cut-off events. [2024-06-27 17:58:31,383 INFO L125 PetriNetUnfolderBase]: For 9496/9505 co-relation queries the response was YES. [2024-06-27 17:58:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1237 events. 523/1237 cut-off events. For 9496/9505 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9163 event pairs, 311 based on Foata normal form. 6/1178 useless extension candidates. Maximal degree in co-relation 3389. Up to 750 conditions per place. [2024-06-27 17:58:31,390 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 52 selfloop transitions, 29 changer transitions 0/94 dead transitions. [2024-06-27 17:58:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 94 transitions, 710 flow [2024-06-27 17:58:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 17:58:31,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-06-27 17:58:31,393 INFO L175 Difference]: Start difference. First operand has 121 places, 74 transitions, 486 flow. Second operand 8 states and 183 transitions. [2024-06-27 17:58:31,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 94 transitions, 710 flow [2024-06-27 17:58:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 94 transitions, 690 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:31,411 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 527 flow [2024-06-27 17:58:31,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=527, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-06-27 17:58:31,412 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 85 predicate places. [2024-06-27 17:58:31,412 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 527 flow [2024-06-27 17:58:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:31,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 17:58:31,413 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:31,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1402159015, now seen corresponding path program 3 times [2024-06-27 17:58:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975964222] [2024-06-27 17:58:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:31,490 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 17:58:31,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975964222] [2024-06-27 17:58:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975964222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:31,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:31,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706437223] [2024-06-27 17:58:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:31,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:31,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:31,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 527 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:31,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:31,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:31,724 INFO L124 PetriNetUnfolderBase]: 545/1295 cut-off events. [2024-06-27 17:58:31,724 INFO L125 PetriNetUnfolderBase]: For 10107/10116 co-relation queries the response was YES. [2024-06-27 17:58:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 1295 events. 545/1295 cut-off events. For 10107/10116 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9656 event pairs, 327 based on Foata normal form. 6/1240 useless extension candidates. Maximal degree in co-relation 3575. Up to 918 conditions per place. [2024-06-27 17:58:31,731 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 70 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-06-27 17:58:31,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 94 transitions, 751 flow [2024-06-27 17:58:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 17:58:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 17:58:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 17:58:31,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 17:58:31,732 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 527 flow. Second operand 8 states and 176 transitions. [2024-06-27 17:58:31,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 94 transitions, 751 flow [2024-06-27 17:58:31,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 694 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:31,754 INFO L231 Difference]: Finished difference. Result has 125 places, 74 transitions, 495 flow [2024-06-27 17:58:31,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=495, PETRI_PLACES=125, PETRI_TRANSITIONS=74} [2024-06-27 17:58:31,754 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2024-06-27 17:58:31,755 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 74 transitions, 495 flow [2024-06-27 17:58:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:31,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:31,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 17:58:31,755 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:31,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -196864315, now seen corresponding path program 4 times [2024-06-27 17:58:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:31,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881481894] [2024-06-27 17:58:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:31,840 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 17:58:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:31,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881481894] [2024-06-27 17:58:31,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881481894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:31,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336761357] [2024-06-27 17:58:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 17:58:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 17:58:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 17:58:31,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 36 [2024-06-27 17:58:31,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 74 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:31,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:31,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 36 [2024-06-27 17:58:31,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,032 INFO L124 PetriNetUnfolderBase]: 538/1282 cut-off events. [2024-06-27 17:58:32,033 INFO L125 PetriNetUnfolderBase]: For 5823/5832 co-relation queries the response was YES. [2024-06-27 17:58:32,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 1282 events. 538/1282 cut-off events. For 5823/5832 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9529 event pairs, 312 based on Foata normal form. 6/1227 useless extension candidates. Maximal degree in co-relation 3281. Up to 821 conditions per place. [2024-06-27 17:58:32,039 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 72 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-06-27 17:58:32,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 97 transitions, 653 flow [2024-06-27 17:58:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 17:58:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 17:58:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-27 17:58:32,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-06-27 17:58:32,040 INFO L175 Difference]: Start difference. First operand has 125 places, 74 transitions, 495 flow. Second operand 9 states and 196 transitions. [2024-06-27 17:58:32,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 97 transitions, 653 flow [2024-06-27 17:58:32,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 97 transitions, 524 flow, removed 8 selfloop flow, removed 46 redundant places. [2024-06-27 17:58:32,046 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 318 flow [2024-06-27 17:58:32,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=318, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-06-27 17:58:32,047 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-06-27 17:58:32,047 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 318 flow [2024-06-27 17:58:32,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 17:58:32,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 17:58:32,047 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:32,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -389926156, now seen corresponding path program 1 times [2024-06-27 17:58:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509324054] [2024-06-27 17:58:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,119 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 17:58:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509324054] [2024-06-27 17:58:32,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509324054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:58:32,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739880315] [2024-06-27 17:58:32,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:58:32,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:58:32,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:58:32,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 36 [2024-06-27 17:58:32,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 17:58:32,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:32,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 36 [2024-06-27 17:58:32,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,200 INFO L124 PetriNetUnfolderBase]: 410/1182 cut-off events. [2024-06-27 17:58:32,200 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2024-06-27 17:58:32,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1182 events. 410/1182 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8651 event pairs, 20 based on Foata normal form. 96/1226 useless extension candidates. Maximal degree in co-relation 2419. Up to 344 conditions per place. [2024-06-27 17:58:32,203 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 18 selfloop transitions, 24 changer transitions 1/83 dead transitions. [2024-06-27 17:58:32,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 83 transitions, 427 flow [2024-06-27 17:58:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:58:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:58:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 17:58:32,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-06-27 17:58:32,204 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 318 flow. Second operand 5 states and 132 transitions. [2024-06-27 17:58:32,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 83 transitions, 427 flow [2024-06-27 17:58:32,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 404 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 17:58:32,206 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 372 flow [2024-06-27 17:58:32,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-06-27 17:58:32,206 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2024-06-27 17:58:32,206 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 372 flow [2024-06-27 17:58:32,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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 17:58:32,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 17:58:32,207 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:32,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash 83925683, now seen corresponding path program 1 times [2024-06-27 17:58:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430617631] [2024-06-27 17:58:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,307 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 17:58:32,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430617631] [2024-06-27 17:58:32,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430617631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:32,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975617094] [2024-06-27 17:58:32,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:32,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:32,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-06-27 17:58:32,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:32,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-06-27 17:58:32,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,432 INFO L124 PetriNetUnfolderBase]: 344/966 cut-off events. [2024-06-27 17:58:32,432 INFO L125 PetriNetUnfolderBase]: For 515/515 co-relation queries the response was YES. [2024-06-27 17:58:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2316 conditions, 966 events. 344/966 cut-off events. For 515/515 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6524 event pairs, 126 based on Foata normal form. 28/920 useless extension candidates. Maximal degree in co-relation 2301. Up to 398 conditions per place. [2024-06-27 17:58:32,434 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 23 selfloop transitions, 10 changer transitions 30/88 dead transitions. [2024-06-27 17:58:32,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 512 flow [2024-06-27 17:58:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 17:58:32,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2024-06-27 17:58:32,435 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 372 flow. Second operand 6 states and 147 transitions. [2024-06-27 17:58:32,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 512 flow [2024-06-27 17:58:32,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 406 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:32,438 INFO L231 Difference]: Finished difference. Result has 87 places, 51 transitions, 206 flow [2024-06-27 17:58:32,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=87, PETRI_TRANSITIONS=51} [2024-06-27 17:58:32,438 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-06-27 17:58:32,438 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 51 transitions, 206 flow [2024-06-27 17:58:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 17:58:32,439 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash -941048551, now seen corresponding path program 2 times [2024-06-27 17:58:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782983567] [2024-06-27 17:58:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,509 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 17:58:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782983567] [2024-06-27 17:58:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782983567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359996936] [2024-06-27 17:58:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:32,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 36 [2024-06-27 17:58:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 51 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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 17:58:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 36 [2024-06-27 17:58:32,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,598 INFO L124 PetriNetUnfolderBase]: 153/447 cut-off events. [2024-06-27 17:58:32,599 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-06-27 17:58:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 975 conditions, 447 events. 153/447 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2428 event pairs, 70 based on Foata normal form. 16/419 useless extension candidates. Maximal degree in co-relation 961. Up to 152 conditions per place. [2024-06-27 17:58:32,600 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 15 selfloop transitions, 2 changer transitions 28/66 dead transitions. [2024-06-27 17:58:32,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 310 flow [2024-06-27 17:58:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 17:58:32,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-06-27 17:58:32,601 INFO L175 Difference]: Start difference. First operand has 87 places, 51 transitions, 206 flow. Second operand 6 states and 151 transitions. [2024-06-27 17:58:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 310 flow [2024-06-27 17:58:32,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 274 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 17:58:32,603 INFO L231 Difference]: Finished difference. Result has 68 places, 36 transitions, 118 flow [2024-06-27 17:58:32,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=118, PETRI_PLACES=68, PETRI_TRANSITIONS=36} [2024-06-27 17:58:32,604 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2024-06-27 17:58:32,604 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 36 transitions, 118 flow [2024-06-27 17:58:32,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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 17:58:32,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:58:32,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 17:58:32,605 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:58:32,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:58:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1277497301, now seen corresponding path program 3 times [2024-06-27 17:58:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:58:32,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883166340] [2024-06-27 17:58:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:58:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:58:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:58:32,673 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 17:58:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:58:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883166340] [2024-06-27 17:58:32,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883166340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:58:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:58:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 17:58:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934821728] [2024-06-27 17:58:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:58:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 17:58:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:58:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 17:58:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 17:58:32,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2024-06-27 17:58:32,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 36 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:58:32,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2024-06-27 17:58:32,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:58:32,756 INFO L124 PetriNetUnfolderBase]: 65/195 cut-off events. [2024-06-27 17:58:32,756 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 17:58:32,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 195 events. 65/195 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 759 event pairs, 10 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 413. Up to 73 conditions per place. [2024-06-27 17:58:32,756 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-06-27 17:58:32,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 172 flow [2024-06-27 17:58:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 17:58:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 17:58:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 17:58:32,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-27 17:58:32,757 INFO L175 Difference]: Start difference. First operand has 68 places, 36 transitions, 118 flow. Second operand 6 states and 136 transitions. [2024-06-27 17:58:32,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 172 flow [2024-06-27 17:58:32,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 162 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 17:58:32,758 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-27 17:58:32,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=50, PETRI_TRANSITIONS=0} [2024-06-27 17:58:32,759 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-06-27 17:58:32,759 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-27 17:58:32,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:58:32,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 17:58:32,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 17:58:32,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 17:58:32,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 17:58:32,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 17:58:32,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 17:58:32,765 INFO L445 BasicCegarLoop]: Path program histogram: [10, 6, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:58:32,767 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:58:32,767 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:58:32,770 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 17:58:32,770 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 17:58:32,771 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:58:32 BasicIcfg [2024-06-27 17:58:32,771 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:58:32,771 INFO L158 Benchmark]: Toolchain (without parser) took 11238.68ms. Allocated memory was 155.2MB in the beginning and 427.8MB in the end (delta: 272.6MB). Free memory was 77.3MB in the beginning and 266.6MB in the end (delta: -189.3MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,772 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory was 107.2MB in the beginning and 107.0MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:58:32,772 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 155.2MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:58:32,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.93ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 77.0MB in the beginning and 158.7MB in the end (delta: -81.8MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,772 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.09ms. Allocated memory is still 203.4MB. Free memory was 158.7MB in the beginning and 156.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,772 INFO L158 Benchmark]: Boogie Preprocessor took 29.22ms. Allocated memory is still 203.4MB. Free memory was 156.6MB in the beginning and 154.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,773 INFO L158 Benchmark]: RCFGBuilder took 400.35ms. Allocated memory is still 203.4MB. Free memory was 154.5MB in the beginning and 134.6MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,773 INFO L158 Benchmark]: TraceAbstraction took 10275.49ms. Allocated memory was 203.4MB in the beginning and 427.8MB in the end (delta: 224.4MB). Free memory was 133.6MB in the beginning and 266.6MB in the end (delta: -133.0MB). Peak memory consumption was 91.4MB. Max. memory is 16.1GB. [2024-06-27 17:58:32,774 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 155.2MB. Free memory was 107.2MB in the beginning and 107.0MB in the end (delta: 159.6kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 155.2MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 499.93ms. Allocated memory was 155.2MB in the beginning and 203.4MB in the end (delta: 48.2MB). Free memory was 77.0MB in the beginning and 158.7MB in the end (delta: -81.8MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.09ms. Allocated memory is still 203.4MB. Free memory was 158.7MB in the beginning and 156.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.22ms. Allocated memory is still 203.4MB. Free memory was 156.6MB in the beginning and 154.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.35ms. Allocated memory is still 203.4MB. Free memory was 154.5MB in the beginning and 134.6MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 10275.49ms. Allocated memory was 203.4MB in the beginning and 427.8MB in the end (delta: 224.4MB). Free memory was 133.6MB in the beginning and 266.6MB in the end (delta: -133.0MB). Peak memory consumption was 91.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 767]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 768]: 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, 54 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: 10.2s, OverallIterations: 46, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2100 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1589 mSDsluCounter, 497 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 325 mSDsCounter, 211 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7098 IncrementalHoareTripleChecker+Invalid, 7309 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 211 mSolverCounterUnsat, 172 mSDtfsCounter, 7098 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=550occurred in iteration=23, InterpolantAutomatonStates: 310, 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, 748 NumberOfCodeBlocks, 748 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 702 ConstructedInterpolants, 0 QuantifiedInterpolants, 5922 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 46 InterpolantComputations, 46 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 17:58:32,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE