./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/chl-chromosome-opt-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/chl-chromosome-opt-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:06:26,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:06:26,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:06:26,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:06:26,268 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:06:26,289 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:06:26,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:06:26,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:06:26,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:06:26,299 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:06:26,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:06:26,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:06:26,301 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:06:26,302 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:06:26,302 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:06:26,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:06:26,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:06:26,303 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:06:26,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:06:26,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:06:26,304 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:06:26,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:06:26,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:06:26,305 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:06:26,305 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:06:26,305 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:06:26,306 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:06:26,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:06:26,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:06:26,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:06:26,307 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:06:26,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:06:26,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:26,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:06:26,308 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:06:26,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:06:26,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:06:26,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:06:26,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:06:26,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:06:26,309 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:06:26,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:06:26,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:06:26,310 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:06:26,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:06:26,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:06:26,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:06:26,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:06:26,622 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:06:26,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-06-28 01:06:27,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:06:27,869 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:06:27,870 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c [2024-06-28 01:06:27,878 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08a07fcb2/18faf7945d7040b181e84d1055b15f28/FLAG95640e7f1 [2024-06-28 01:06:27,895 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08a07fcb2/18faf7945d7040b181e84d1055b15f28 [2024-06-28 01:06:27,897 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:06:27,898 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:06:27,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/chl-chromosome-opt-symm.wvr.yml/witness.yml [2024-06-28 01:06:27,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:06:27,979 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:06:27,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:27,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:06:27,985 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:06:27,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:27" (1/2) ... [2024-06-28 01:06:27,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33464d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:27, skipping insertion in model container [2024-06-28 01:06:27,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:27" (1/2) ... [2024-06-28 01:06:27,989 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50fa8071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:27, skipping insertion in model container [2024-06-28 01:06:27,989 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:27" (2/2) ... [2024-06-28 01:06:27,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33464d61 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:27, skipping insertion in model container [2024-06-28 01:06:27,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:27" (2/2) ... [2024-06-28 01:06:27,990 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:06:28,007 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:06:28,008 INFO L97 edCorrectnessWitness]: Location invariant before [L88-L88] (! multithreaded || ((res1 == -1 || res1 == 0) || res1 == 1)) && (! multithreaded || ((res2 == -1 || res2 == 0) || res2 == 1)) [2024-06-28 01:06:28,008 INFO L97 edCorrectnessWitness]: Location invariant before [L89-L89] (! multithreaded || ((res1 == -1 || res1 == 0) || res1 == 1)) && (! multithreaded || ((res2 == -1 || res2 == 0) || res2 == 1)) [2024-06-28 01:06:28,008 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:06:28,008 INFO L106 edCorrectnessWitness]: ghost_update [L87-L87] multithreaded = 1; [2024-06-28 01:06:28,028 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:06:28,193 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-06-28 01:06:28,207 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:28,215 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:06:28,261 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-opt-symm.wvr.c[2592,2605] [2024-06-28 01:06:28,266 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:28,278 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:06:28,279 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28 WrapperNode [2024-06-28 01:06:28,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:28,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:28,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:06:28,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:06:28,285 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 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,291 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 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,328 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 174 [2024-06-28 01:06:28,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:28,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:06:28,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:06:28,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:06:28,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,360 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-28 01:06:28,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,381 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,385 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:06:28,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:06:28,386 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:06:28,386 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:06:28,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (1/1) ... [2024-06-28 01:06:28,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:28,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 01:06:28,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 01:06:28,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:06:28,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:06:28,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:06:28,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-28 01:06:28,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:06:28,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:06:28,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:06:28,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:06:28,451 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:06:28,531 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:06:28,533 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:06:28,764 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:06:28,764 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:06:28,942 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:06:28,942 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-28 01:06:28,943 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:28 BoogieIcfgContainer [2024-06-28 01:06:28,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:06:28,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:06:28,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:06:28,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:06:28,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:06:27" (1/4) ... [2024-06-28 01:06:28,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cfaaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:06:28, skipping insertion in model container [2024-06-28 01:06:28,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:27" (2/4) ... [2024-06-28 01:06:28,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cfaaf1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:06:28, skipping insertion in model container [2024-06-28 01:06:28,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:28" (3/4) ... [2024-06-28 01:06:28,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cfaaf1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:06:28, skipping insertion in model container [2024-06-28 01:06:28,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:28" (4/4) ... [2024-06-28 01:06:28,953 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-06-28 01:06:28,996 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:06:28,996 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:06:28,996 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:06:29,075 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 01:06:29,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2024-06-28 01:06:29,134 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2024-06-28 01:06:29,134 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 01:06:29,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-28 01:06:29,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2024-06-28 01:06:29,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2024-06-28 01:06:29,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:06:29,159 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;@c55df71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:06:29,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:06:29,168 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:06:29,168 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2024-06-28 01:06:29,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:06:29,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:29,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:29,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:29,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1968923665, now seen corresponding path program 1 times [2024-06-28 01:06:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:29,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998211472] [2024-06-28 01:06:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:29,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998211472] [2024-06-28 01:06:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998211472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:29,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:29,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:06:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089214657] [2024-06-28 01:06:29,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:29,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:29,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-28 01:06:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:29,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:29,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-28 01:06:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:29,630 INFO L124 PetriNetUnfolderBase]: 206/350 cut-off events. [2024-06-28 01:06:29,630 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-28 01:06:29,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 350 events. 206/350 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1175 event pairs, 81 based on Foata normal form. 26/297 useless extension candidates. Maximal degree in co-relation 643. Up to 172 conditions per place. [2024-06-28 01:06:29,634 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 3 changer transitions 1/48 dead transitions. [2024-06-28 01:06:29,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 48 transitions, 207 flow [2024-06-28 01:06:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-06-28 01:06:29,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-28 01:06:29,644 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 63 transitions. [2024-06-28 01:06:29,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 48 transitions, 207 flow [2024-06-28 01:06:29,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 193 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:29,648 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 87 flow [2024-06-28 01:06:29,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-06-28 01:06:29,652 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-28 01:06:29,652 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 87 flow [2024-06-28 01:06:29,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:29,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:29,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:29,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:06:29,653 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)] === [2024-06-28 01:06:29,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash 165957982, now seen corresponding path program 1 times [2024-06-28 01:06:29,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:29,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771378357] [2024-06-28 01:06:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:29,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:29,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:29,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771378357] [2024-06-28 01:06:29,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771378357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:29,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:29,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:06:29,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489259062] [2024-06-28 01:06:29,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:29,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:29,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:29,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:29,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:29,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:29,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:29,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:29,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:29,790 INFO L124 PetriNetUnfolderBase]: 178/318 cut-off events. [2024-06-28 01:06:29,790 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-28 01:06:29,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 318 events. 178/318 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1078 event pairs, 122 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 358. Up to 300 conditions per place. [2024-06-28 01:06:29,792 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2024-06-28 01:06:29,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 149 flow [2024-06-28 01:06:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-28 01:06:29,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5050505050505051 [2024-06-28 01:06:29,794 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 87 flow. Second operand 3 states and 50 transitions. [2024-06-28 01:06:29,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 149 flow [2024-06-28 01:06:29,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:29,795 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 106 flow [2024-06-28 01:06:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2024-06-28 01:06:29,796 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-28 01:06:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 106 flow [2024-06-28 01:06:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:29,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:29,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:29,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:06:29,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:29,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1355476768, now seen corresponding path program 1 times [2024-06-28 01:06:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:29,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267790141] [2024-06-28 01:06:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:29,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:29,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267790141] [2024-06-28 01:06:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267790141] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:29,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938825906] [2024-06-28 01:06:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:29,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:29,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:06:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:29,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-28 01:06:29,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:29,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:29,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938825906] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:29,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:29,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-06-28 01:06:29,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226277642] [2024-06-28 01:06:29,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:29,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:29,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:29,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:29,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:29,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 106 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:29,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:29,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:29,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:30,057 INFO L124 PetriNetUnfolderBase]: 178/324 cut-off events. [2024-06-28 01:06:30,058 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-06-28 01:06:30,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 324 events. 178/324 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1076 event pairs, 122 based on Foata normal form. 3/288 useless extension candidates. Maximal degree in co-relation 674. Up to 300 conditions per place. [2024-06-28 01:06:30,060 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2024-06-28 01:06:30,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 200 flow [2024-06-28 01:06:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:06:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:06:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2024-06-28 01:06:30,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-28 01:06:30,061 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 106 flow. Second operand 6 states and 81 transitions. [2024-06-28 01:06:30,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 200 flow [2024-06-28 01:06:30,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:30,063 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 168 flow [2024-06-28 01:06:30,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=168, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2024-06-28 01:06:30,064 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-06-28 01:06:30,064 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 168 flow [2024-06-28 01:06:30,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:30,065 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:30,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:30,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:30,277 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)] === [2024-06-28 01:06:30,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:30,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1316824994, now seen corresponding path program 2 times [2024-06-28 01:06:30,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:30,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125768796] [2024-06-28 01:06:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:30,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-28 01:06:30,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125768796] [2024-06-28 01:06:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125768796] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:30,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209497577] [2024-06-28 01:06:30,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:06:30,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:30,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:30,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:30,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:06:30,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-28 01:06:30,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:30,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-28 01:06:30,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:30,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:30,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 33 [2024-06-28 01:06:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-06-28 01:06:30,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:06:30,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209497577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:30,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:06:30,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-06-28 01:06:30,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178672892] [2024-06-28 01:06:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:06:30,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-28 01:06:30,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:30,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-28 01:06:30,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:30,794 INFO L124 PetriNetUnfolderBase]: 263/464 cut-off events. [2024-06-28 01:06:30,795 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-28 01:06:30,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 464 events. 263/464 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1788 event pairs, 61 based on Foata normal form. 12/419 useless extension candidates. Maximal degree in co-relation 966. Up to 148 conditions per place. [2024-06-28 01:06:30,797 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 65 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2024-06-28 01:06:30,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 76 transitions, 396 flow [2024-06-28 01:06:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-28 01:06:30,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-06-28 01:06:30,799 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 168 flow. Second operand 5 states and 92 transitions. [2024-06-28 01:06:30,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 76 transitions, 396 flow [2024-06-28 01:06:30,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:30,801 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 175 flow [2024-06-28 01:06:30,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-06-28 01:06:30,802 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-28 01:06:30,802 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 175 flow [2024-06-28 01:06:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:30,803 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:30,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:31,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-28 01:06:31,015 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)] === [2024-06-28 01:06:31,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1696489113, now seen corresponding path program 1 times [2024-06-28 01:06:31,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:31,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642804919] [2024-06-28 01:06:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-28 01:06:31,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642804919] [2024-06-28 01:06:31,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642804919] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:31,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168543567] [2024-06-28 01:06:31,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:31,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:31,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:31,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:06:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:31,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:06:31,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-28 01:06:31,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-06-28 01:06:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168543567] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:31,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:31,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-06-28 01:06:31,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805558401] [2024-06-28 01:06:31,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:06:31,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:06:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:06:31,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:31,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 175 flow. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 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) [2024-06-28 01:06:31,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:31,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:31,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:31,446 INFO L124 PetriNetUnfolderBase]: 247/453 cut-off events. [2024-06-28 01:06:31,446 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-06-28 01:06:31,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 453 events. 247/453 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1705 event pairs, 184 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 1022. Up to 426 conditions per place. [2024-06-28 01:06:31,449 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 27 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-06-28 01:06:31,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 265 flow [2024-06-28 01:06:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-28 01:06:31,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722943722943723 [2024-06-28 01:06:31,450 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 175 flow. Second operand 7 states and 86 transitions. [2024-06-28 01:06:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 265 flow [2024-06-28 01:06:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 257 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:31,452 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 213 flow [2024-06-28 01:06:31,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-06-28 01:06:31,453 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-28 01:06:31,453 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 213 flow [2024-06-28 01:06:31,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 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) [2024-06-28 01:06:31,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:31,454 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:31,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:31,666 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)] === [2024-06-28 01:06:31,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 556217701, now seen corresponding path program 2 times [2024-06-28 01:06:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:31,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654013007] [2024-06-28 01:06:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:31,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654013007] [2024-06-28 01:06:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654013007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:32,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:06:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345488109] [2024-06-28 01:06:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:32,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:06:32,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-28 01:06:32,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:32,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-28 01:06:32,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:32,229 INFO L124 PetriNetUnfolderBase]: 339/609 cut-off events. [2024-06-28 01:06:32,229 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-06-28 01:06:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1428 conditions, 609 events. 339/609 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2481 event pairs, 113 based on Foata normal form. 10/576 useless extension candidates. Maximal degree in co-relation 1350. Up to 224 conditions per place. [2024-06-28 01:06:32,232 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 66 selfloop transitions, 7 changer transitions 2/78 dead transitions. [2024-06-28 01:06:32,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 453 flow [2024-06-28 01:06:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 01:06:32,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 01:06:32,243 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 213 flow. Second operand 5 states and 88 transitions. [2024-06-28 01:06:32,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 453 flow [2024-06-28 01:06:32,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 429 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:32,245 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 221 flow [2024-06-28 01:06:32,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-06-28 01:06:32,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2024-06-28 01:06:32,246 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 221 flow [2024-06-28 01:06:32,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:32,246 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:32,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:06:32,246 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)] === [2024-06-28 01:06:32,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:32,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356830, now seen corresponding path program 1 times [2024-06-28 01:06:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:32,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102168552] [2024-06-28 01:06:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:32,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:32,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102168552] [2024-06-28 01:06:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102168552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:32,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 01:06:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984086518] [2024-06-28 01:06:32,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:32,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:06:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:06:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 01:06:32,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2024-06-28 01:06:32,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:32,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2024-06-28 01:06:32,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:32,782 INFO L124 PetriNetUnfolderBase]: 363/660 cut-off events. [2024-06-28 01:06:32,783 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-28 01:06:32,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 660 events. 363/660 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2846 event pairs, 45 based on Foata normal form. 4/663 useless extension candidates. Maximal degree in co-relation 1572. Up to 172 conditions per place. [2024-06-28 01:06:32,786 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 81 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2024-06-28 01:06:32,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 536 flow [2024-06-28 01:06:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:06:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:06:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-28 01:06:32,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-28 01:06:32,790 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 221 flow. Second operand 8 states and 122 transitions. [2024-06-28 01:06:32,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 536 flow [2024-06-28 01:06:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 96 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 01:06:32,795 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 250 flow [2024-06-28 01:06:32,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-28 01:06:32,797 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2024-06-28 01:06:32,797 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 250 flow [2024-06-28 01:06:32,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:32,797 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:32,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:06:32,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:32,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash 385130435, now seen corresponding path program 1 times [2024-06-28 01:06:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:32,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282193629] [2024-06-28 01:06:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:32,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:32,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:32,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282193629] [2024-06-28 01:06:32,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282193629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:32,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:32,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:32,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514725102] [2024-06-28 01:06:32,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:32,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:32,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:32,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:32,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:32,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:32,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:32,991 INFO L124 PetriNetUnfolderBase]: 467/852 cut-off events. [2024-06-28 01:06:32,991 INFO L125 PetriNetUnfolderBase]: For 464/466 co-relation queries the response was YES. [2024-06-28 01:06:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 852 events. 467/852 cut-off events. For 464/466 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4039 event pairs, 193 based on Foata normal form. 5/857 useless extension candidates. Maximal degree in co-relation 2166. Up to 445 conditions per place. [2024-06-28 01:06:32,995 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 74 selfloop transitions, 5 changer transitions 4/86 dead transitions. [2024-06-28 01:06:32,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 570 flow [2024-06-28 01:06:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-28 01:06:32,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2024-06-28 01:06:32,996 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 250 flow. Second operand 5 states and 92 transitions. [2024-06-28 01:06:32,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 570 flow [2024-06-28 01:06:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 561 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:32,999 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 267 flow [2024-06-28 01:06:32,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-06-28 01:06:32,999 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-28 01:06:33,000 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 267 flow [2024-06-28 01:06:33,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 01:06:33,000 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2067495451, now seen corresponding path program 1 times [2024-06-28 01:06:33,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105328150] [2024-06-28 01:06:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105328150] [2024-06-28 01:06:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105328150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889287219] [2024-06-28 01:06:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:33,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:33,189 INFO L124 PetriNetUnfolderBase]: 592/1101 cut-off events. [2024-06-28 01:06:33,189 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2024-06-28 01:06:33,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1101 events. 592/1101 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5484 event pairs, 268 based on Foata normal form. 4/1105 useless extension candidates. Maximal degree in co-relation 2994. Up to 606 conditions per place. [2024-06-28 01:06:33,194 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 76 selfloop transitions, 5 changer transitions 2/86 dead transitions. [2024-06-28 01:06:33,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 86 transitions, 598 flow [2024-06-28 01:06:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-28 01:06:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2024-06-28 01:06:33,196 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 267 flow. Second operand 5 states and 86 transitions. [2024-06-28 01:06:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 86 transitions, 598 flow [2024-06-28 01:06:33,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:33,198 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 285 flow [2024-06-28 01:06:33,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-28 01:06:33,199 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-28 01:06:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 285 flow [2024-06-28 01:06:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 01:06:33,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1159540353, now seen corresponding path program 2 times [2024-06-28 01:06:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379176718] [2024-06-28 01:06:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379176718] [2024-06-28 01:06:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379176718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318304333] [2024-06-28 01:06:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:33,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:33,396 INFO L124 PetriNetUnfolderBase]: 752/1361 cut-off events. [2024-06-28 01:06:33,396 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-28 01:06:33,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 1361 events. 752/1361 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7011 event pairs, 250 based on Foata normal form. 28/1389 useless extension candidates. Maximal degree in co-relation 4075. Up to 1038 conditions per place. [2024-06-28 01:06:33,404 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 76 selfloop transitions, 4 changer transitions 2/85 dead transitions. [2024-06-28 01:06:33,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 613 flow [2024-06-28 01:06:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:06:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:06:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-28 01:06:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-28 01:06:33,405 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 285 flow. Second operand 4 states and 76 transitions. [2024-06-28 01:06:33,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 613 flow [2024-06-28 01:06:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 605 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:33,408 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 328 flow [2024-06-28 01:06:33,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-06-28 01:06:33,409 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2024-06-28 01:06:33,409 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 328 flow [2024-06-28 01:06:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,409 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:06:33,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -85164881, now seen corresponding path program 2 times [2024-06-28 01:06:33,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391290330] [2024-06-28 01:06:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391290330] [2024-06-28 01:06:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391290330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:33,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357907880] [2024-06-28 01:06:33,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:33,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:33,617 INFO L124 PetriNetUnfolderBase]: 788/1425 cut-off events. [2024-06-28 01:06:33,617 INFO L125 PetriNetUnfolderBase]: For 1732/1732 co-relation queries the response was YES. [2024-06-28 01:06:33,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4467 conditions, 1425 events. 788/1425 cut-off events. For 1732/1732 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7334 event pairs, 310 based on Foata normal form. 24/1449 useless extension candidates. Maximal degree in co-relation 4391. Up to 1087 conditions per place. [2024-06-28 01:06:33,625 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 78 selfloop transitions, 6 changer transitions 3/90 dead transitions. [2024-06-28 01:06:33,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 681 flow [2024-06-28 01:06:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:06:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:06:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-28 01:06:33,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 01:06:33,626 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 328 flow. Second operand 4 states and 77 transitions. [2024-06-28 01:06:33,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 681 flow [2024-06-28 01:06:33,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 681 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 01:06:33,629 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 393 flow [2024-06-28 01:06:33,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-06-28 01:06:33,630 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-28 01:06:33,630 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 393 flow [2024-06-28 01:06:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,630 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:06:33,631 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2118369909, now seen corresponding path program 3 times [2024-06-28 01:06:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417032391] [2024-06-28 01:06:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:33,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417032391] [2024-06-28 01:06:33,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417032391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066165582] [2024-06-28 01:06:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:33,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:33,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 393 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:33,830 INFO L124 PetriNetUnfolderBase]: 718/1300 cut-off events. [2024-06-28 01:06:33,830 INFO L125 PetriNetUnfolderBase]: For 2101/2101 co-relation queries the response was YES. [2024-06-28 01:06:33,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4253 conditions, 1300 events. 718/1300 cut-off events. For 2101/2101 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6630 event pairs, 300 based on Foata normal form. 20/1320 useless extension candidates. Maximal degree in co-relation 4174. Up to 740 conditions per place. [2024-06-28 01:06:33,839 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 85 selfloop transitions, 10 changer transitions 3/101 dead transitions. [2024-06-28 01:06:33,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 799 flow [2024-06-28 01:06:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:06:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:06:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-28 01:06:33,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2024-06-28 01:06:33,840 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 393 flow. Second operand 4 states and 85 transitions. [2024-06-28 01:06:33,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 799 flow [2024-06-28 01:06:33,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 793 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 01:06:33,844 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 435 flow [2024-06-28 01:06:33,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-28 01:06:33,844 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-28 01:06:33,845 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 435 flow [2024-06-28 01:06:33,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,845 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 01:06:33,845 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1440946237, now seen corresponding path program 3 times [2024-06-28 01:06:33,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968669631] [2024-06-28 01:06:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968669631] [2024-06-28 01:06:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968669631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413875656] [2024-06-28 01:06:33,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:33,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:34,047 INFO L124 PetriNetUnfolderBase]: 644/1161 cut-off events. [2024-06-28 01:06:34,047 INFO L125 PetriNetUnfolderBase]: For 2300/2301 co-relation queries the response was YES. [2024-06-28 01:06:34,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 1161 events. 644/1161 cut-off events. For 2300/2301 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5580 event pairs, 256 based on Foata normal form. 23/1184 useless extension candidates. Maximal degree in co-relation 3864. Up to 680 conditions per place. [2024-06-28 01:06:34,054 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 81 selfloop transitions, 10 changer transitions 2/96 dead transitions. [2024-06-28 01:06:34,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 820 flow [2024-06-28 01:06:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:06:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:06:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-06-28 01:06:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-06-28 01:06:34,056 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 435 flow. Second operand 4 states and 79 transitions. [2024-06-28 01:06:34,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 820 flow [2024-06-28 01:06:34,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 794 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 01:06:34,060 INFO L231 Difference]: Finished difference. Result has 77 places, 64 transitions, 469 flow [2024-06-28 01:06:34,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=469, PETRI_PLACES=77, PETRI_TRANSITIONS=64} [2024-06-28 01:06:34,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-28 01:06:34,060 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 64 transitions, 469 flow [2024-06-28 01:06:34,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:34,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:34,061 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:06:34,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:34,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 872518883, now seen corresponding path program 1 times [2024-06-28 01:06:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:34,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524112445] [2024-06-28 01:06:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:34,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524112445] [2024-06-28 01:06:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524112445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:34,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:34,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:34,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492493744] [2024-06-28 01:06:34,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:34,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:34,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:34,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 64 transitions, 469 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:34,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:34,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:34,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:35,330 INFO L124 PetriNetUnfolderBase]: 657/1191 cut-off events. [2024-06-28 01:06:35,331 INFO L125 PetriNetUnfolderBase]: For 2150/2150 co-relation queries the response was YES. [2024-06-28 01:06:35,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4089 conditions, 1191 events. 657/1191 cut-off events. For 2150/2150 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6026 event pairs, 108 based on Foata normal form. 6/1197 useless extension candidates. Maximal degree in co-relation 4008. Up to 271 conditions per place. [2024-06-28 01:06:35,338 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 115 selfloop transitions, 31 changer transitions 18/167 dead transitions. [2024-06-28 01:06:35,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 167 transitions, 1301 flow [2024-06-28 01:06:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:06:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:06:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 223 transitions. [2024-06-28 01:06:35,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505050505050505 [2024-06-28 01:06:35,353 INFO L175 Difference]: Start difference. First operand has 77 places, 64 transitions, 469 flow. Second operand 15 states and 223 transitions. [2024-06-28 01:06:35,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 167 transitions, 1301 flow [2024-06-28 01:06:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 167 transitions, 1261 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 01:06:35,358 INFO L231 Difference]: Finished difference. Result has 92 places, 75 transitions, 618 flow [2024-06-28 01:06:35,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=618, PETRI_PLACES=92, PETRI_TRANSITIONS=75} [2024-06-28 01:06:35,358 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-28 01:06:35,359 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 75 transitions, 618 flow [2024-06-28 01:06:35,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:35,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:35,359 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:35,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:06:35,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:35,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:35,359 INFO L85 PathProgramCache]: Analyzing trace with hash -608623867, now seen corresponding path program 2 times [2024-06-28 01:06:35,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:35,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572167697] [2024-06-28 01:06:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:35,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:36,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572167697] [2024-06-28 01:06:36,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572167697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:36,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:36,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542982951] [2024-06-28 01:06:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:36,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:36,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:36,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 75 transitions, 618 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:36,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:36,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:36,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:37,177 INFO L124 PetriNetUnfolderBase]: 1111/1998 cut-off events. [2024-06-28 01:06:37,177 INFO L125 PetriNetUnfolderBase]: For 4626/4626 co-relation queries the response was YES. [2024-06-28 01:06:37,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7312 conditions, 1998 events. 1111/1998 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11380 event pairs, 131 based on Foata normal form. 3/2001 useless extension candidates. Maximal degree in co-relation 7226. Up to 370 conditions per place. [2024-06-28 01:06:37,188 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 192 selfloop transitions, 96 changer transitions 13/304 dead transitions. [2024-06-28 01:06:37,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 304 transitions, 2396 flow [2024-06-28 01:06:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-28 01:06:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-28 01:06:37,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 467 transitions. [2024-06-28 01:06:37,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45650048875855326 [2024-06-28 01:06:37,191 INFO L175 Difference]: Start difference. First operand has 92 places, 75 transitions, 618 flow. Second operand 31 states and 467 transitions. [2024-06-28 01:06:37,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 304 transitions, 2396 flow [2024-06-28 01:06:37,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 304 transitions, 2217 flow, removed 72 selfloop flow, removed 9 redundant places. [2024-06-28 01:06:37,202 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 1405 flow [2024-06-28 01:06:37,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1405, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2024-06-28 01:06:37,203 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-28 01:06:37,203 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 1405 flow [2024-06-28 01:06:37,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:37,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:37,204 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 01:06:37,204 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -904049727, now seen corresponding path program 3 times [2024-06-28 01:06:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:37,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826034617] [2024-06-28 01:06:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:37,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:37,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826034617] [2024-06-28 01:06:37,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826034617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:37,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:37,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833211577] [2024-06-28 01:06:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:37,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:37,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 1405 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:37,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:38,715 INFO L124 PetriNetUnfolderBase]: 1475/2662 cut-off events. [2024-06-28 01:06:38,715 INFO L125 PetriNetUnfolderBase]: For 6979/6979 co-relation queries the response was YES. [2024-06-28 01:06:38,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10304 conditions, 2662 events. 1475/2662 cut-off events. For 6979/6979 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 16320 event pairs, 116 based on Foata normal form. 1/2663 useless extension candidates. Maximal degree in co-relation 10212. Up to 438 conditions per place. [2024-06-28 01:06:38,730 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 165 selfloop transitions, 141 changer transitions 10/319 dead transitions. [2024-06-28 01:06:38,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 319 transitions, 2925 flow [2024-06-28 01:06:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-28 01:06:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-28 01:06:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 393 transitions. [2024-06-28 01:06:38,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44107744107744107 [2024-06-28 01:06:38,732 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 1405 flow. Second operand 27 states and 393 transitions. [2024-06-28 01:06:38,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 319 transitions, 2925 flow [2024-06-28 01:06:38,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 319 transitions, 2786 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:38,752 INFO L231 Difference]: Finished difference. Result has 147 places, 200 transitions, 2213 flow [2024-06-28 01:06:38,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2213, PETRI_PLACES=147, PETRI_TRANSITIONS=200} [2024-06-28 01:06:38,753 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 116 predicate places. [2024-06-28 01:06:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 200 transitions, 2213 flow [2024-06-28 01:06:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:38,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:38,753 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:38,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:06:38,753 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:38,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2042887547, now seen corresponding path program 4 times [2024-06-28 01:06:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743623009] [2024-06-28 01:06:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:38,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:39,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:39,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743623009] [2024-06-28 01:06:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743623009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:39,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:39,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:39,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319624218] [2024-06-28 01:06:39,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:39,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:39,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:39,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 200 transitions, 2213 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:39,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:39,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:39,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:40,551 INFO L124 PetriNetUnfolderBase]: 1466/2637 cut-off events. [2024-06-28 01:06:40,564 INFO L125 PetriNetUnfolderBase]: For 9007/9007 co-relation queries the response was YES. [2024-06-28 01:06:40,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11503 conditions, 2637 events. 1466/2637 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16008 event pairs, 83 based on Foata normal form. 1/2638 useless extension candidates. Maximal degree in co-relation 11405. Up to 434 conditions per place. [2024-06-28 01:06:40,588 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 159 selfloop transitions, 152 changer transitions 10/324 dead transitions. [2024-06-28 01:06:40,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 324 transitions, 3281 flow [2024-06-28 01:06:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-28 01:06:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-28 01:06:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 436 transitions. [2024-06-28 01:06:40,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426197458455523 [2024-06-28 01:06:40,590 INFO L175 Difference]: Start difference. First operand has 147 places, 200 transitions, 2213 flow. Second operand 31 states and 436 transitions. [2024-06-28 01:06:40,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 324 transitions, 3281 flow [2024-06-28 01:06:40,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 324 transitions, 3081 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-28 01:06:40,629 INFO L231 Difference]: Finished difference. Result has 166 places, 200 transitions, 2332 flow [2024-06-28 01:06:40,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2332, PETRI_PLACES=166, PETRI_TRANSITIONS=200} [2024-06-28 01:06:40,630 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-28 01:06:40,630 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 200 transitions, 2332 flow [2024-06-28 01:06:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:06:40,631 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:40,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1494422147, now seen corresponding path program 5 times [2024-06-28 01:06:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942669761] [2024-06-28 01:06:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:41,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:41,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942669761] [2024-06-28 01:06:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942669761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:41,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:41,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633390697] [2024-06-28 01:06:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:41,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 200 transitions, 2332 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:41,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:41,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:41,939 INFO L124 PetriNetUnfolderBase]: 1486/2684 cut-off events. [2024-06-28 01:06:41,939 INFO L125 PetriNetUnfolderBase]: For 9642/9644 co-relation queries the response was YES. [2024-06-28 01:06:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11941 conditions, 2684 events. 1486/2684 cut-off events. For 9642/9644 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16460 event pairs, 336 based on Foata normal form. 1/2685 useless extension candidates. Maximal degree in co-relation 11844. Up to 912 conditions per place. [2024-06-28 01:06:41,959 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 194 selfloop transitions, 84 changer transitions 10/291 dead transitions. [2024-06-28 01:06:41,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3421 flow [2024-06-28 01:06:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:06:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:06:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 260 transitions. [2024-06-28 01:06:41,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46345811051693403 [2024-06-28 01:06:41,961 INFO L175 Difference]: Start difference. First operand has 166 places, 200 transitions, 2332 flow. Second operand 17 states and 260 transitions. [2024-06-28 01:06:41,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3421 flow [2024-06-28 01:06:41,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 291 transitions, 3016 flow, removed 16 selfloop flow, removed 33 redundant places. [2024-06-28 01:06:41,990 INFO L231 Difference]: Finished difference. Result has 157 places, 218 transitions, 2408 flow [2024-06-28 01:06:41,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2408, PETRI_PLACES=157, PETRI_TRANSITIONS=218} [2024-06-28 01:06:41,990 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 126 predicate places. [2024-06-28 01:06:41,991 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 218 transitions, 2408 flow [2024-06-28 01:06:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:41,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:41,991 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 01:06:41,991 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:41,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -645673997, now seen corresponding path program 6 times [2024-06-28 01:06:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094093915] [2024-06-28 01:06:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094093915] [2024-06-28 01:06:42,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094093915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:42,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:42,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997171019] [2024-06-28 01:06:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:42,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:42,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:42,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 218 transitions, 2408 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:42,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:42,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:42,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:43,365 INFO L124 PetriNetUnfolderBase]: 1601/2893 cut-off events. [2024-06-28 01:06:43,365 INFO L125 PetriNetUnfolderBase]: For 9904/9908 co-relation queries the response was YES. [2024-06-28 01:06:43,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12384 conditions, 2893 events. 1601/2893 cut-off events. For 9904/9908 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18098 event pairs, 233 based on Foata normal form. 1/2894 useless extension candidates. Maximal degree in co-relation 12283. Up to 908 conditions per place. [2024-06-28 01:06:43,391 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 192 selfloop transitions, 139 changer transitions 11/345 dead transitions. [2024-06-28 01:06:43,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 345 transitions, 3704 flow [2024-06-28 01:06:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 01:06:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 01:06:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 384 transitions. [2024-06-28 01:06:43,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46545454545454545 [2024-06-28 01:06:43,395 INFO L175 Difference]: Start difference. First operand has 157 places, 218 transitions, 2408 flow. Second operand 25 states and 384 transitions. [2024-06-28 01:06:43,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 345 transitions, 3704 flow [2024-06-28 01:06:43,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 345 transitions, 3633 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:43,427 INFO L231 Difference]: Finished difference. Result has 181 places, 234 transitions, 2897 flow [2024-06-28 01:06:43,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2897, PETRI_PLACES=181, PETRI_TRANSITIONS=234} [2024-06-28 01:06:43,427 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2024-06-28 01:06:43,427 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 234 transitions, 2897 flow [2024-06-28 01:06:43,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:43,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:43,428 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:06:43,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:43,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2017937983, now seen corresponding path program 7 times [2024-06-28 01:06:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991233895] [2024-06-28 01:06:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:43,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:43,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991233895] [2024-06-28 01:06:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991233895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:43,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:43,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:43,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024592726] [2024-06-28 01:06:43,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:43,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:43,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:43,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 234 transitions, 2897 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:43,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:43,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:43,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:44,892 INFO L124 PetriNetUnfolderBase]: 1880/3451 cut-off events. [2024-06-28 01:06:44,892 INFO L125 PetriNetUnfolderBase]: For 14295/14295 co-relation queries the response was YES. [2024-06-28 01:06:44,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14896 conditions, 3451 events. 1880/3451 cut-off events. For 14295/14295 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22743 event pairs, 230 based on Foata normal form. 5/3456 useless extension candidates. Maximal degree in co-relation 14791. Up to 1083 conditions per place. [2024-06-28 01:06:44,926 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 227 selfloop transitions, 136 changer transitions 12/378 dead transitions. [2024-06-28 01:06:44,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 378 transitions, 4540 flow [2024-06-28 01:06:44,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-28 01:06:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-28 01:06:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 339 transitions. [2024-06-28 01:06:44,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2024-06-28 01:06:44,928 INFO L175 Difference]: Start difference. First operand has 181 places, 234 transitions, 2897 flow. Second operand 22 states and 339 transitions. [2024-06-28 01:06:44,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 378 transitions, 4540 flow [2024-06-28 01:06:44,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 378 transitions, 4316 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-28 01:06:44,983 INFO L231 Difference]: Finished difference. Result has 196 places, 268 transitions, 3497 flow [2024-06-28 01:06:44,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3497, PETRI_PLACES=196, PETRI_TRANSITIONS=268} [2024-06-28 01:06:44,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2024-06-28 01:06:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 268 transitions, 3497 flow [2024-06-28 01:06:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:44,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:44,984 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:06:44,985 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:44,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 48480717, now seen corresponding path program 8 times [2024-06-28 01:06:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:44,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535270797] [2024-06-28 01:06:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:45,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:45,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535270797] [2024-06-28 01:06:45,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535270797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:45,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:45,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:45,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810734983] [2024-06-28 01:06:45,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:45,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:45,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:45,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:45,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:45,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 268 transitions, 3497 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:45,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:46,641 INFO L124 PetriNetUnfolderBase]: 2068/3791 cut-off events. [2024-06-28 01:06:46,641 INFO L125 PetriNetUnfolderBase]: For 17286/17286 co-relation queries the response was YES. [2024-06-28 01:06:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 3791 events. 2068/3791 cut-off events. For 17286/17286 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 25617 event pairs, 195 based on Foata normal form. 4/3795 useless extension candidates. Maximal degree in co-relation 16733. Up to 764 conditions per place. [2024-06-28 01:06:46,668 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 226 selfloop transitions, 167 changer transitions 16/412 dead transitions. [2024-06-28 01:06:46,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 412 transitions, 5055 flow [2024-06-28 01:06:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-28 01:06:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-28 01:06:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 403 transitions. [2024-06-28 01:06:46,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-28 01:06:46,670 INFO L175 Difference]: Start difference. First operand has 196 places, 268 transitions, 3497 flow. Second operand 26 states and 403 transitions. [2024-06-28 01:06:46,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 412 transitions, 5055 flow [2024-06-28 01:06:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 412 transitions, 4797 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:46,744 INFO L231 Difference]: Finished difference. Result has 219 places, 284 transitions, 3938 flow [2024-06-28 01:06:46,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3289, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3938, PETRI_PLACES=219, PETRI_TRANSITIONS=284} [2024-06-28 01:06:46,744 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-28 01:06:46,745 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 284 transitions, 3938 flow [2024-06-28 01:06:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:46,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:46,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:46,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:06:46,745 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:46,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:46,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1786280131, now seen corresponding path program 9 times [2024-06-28 01:06:46,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:46,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871797711] [2024-06-28 01:06:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:46,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:47,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:47,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871797711] [2024-06-28 01:06:47,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871797711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:47,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:47,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:47,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505779526] [2024-06-28 01:06:47,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:47,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:47,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 284 transitions, 3938 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:47,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:47,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:47,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:48,142 INFO L124 PetriNetUnfolderBase]: 2059/3780 cut-off events. [2024-06-28 01:06:48,142 INFO L125 PetriNetUnfolderBase]: For 19078/19085 co-relation queries the response was YES. [2024-06-28 01:06:48,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17620 conditions, 3780 events. 2059/3780 cut-off events. For 19078/19085 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25589 event pairs, 313 based on Foata normal form. 1/3781 useless extension candidates. Maximal degree in co-relation 17504. Up to 1147 conditions per place. [2024-06-28 01:06:48,170 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 197 selfloop transitions, 171 changer transitions 11/382 dead transitions. [2024-06-28 01:06:48,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 5081 flow [2024-06-28 01:06:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 01:06:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 01:06:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 349 transitions. [2024-06-28 01:06:48,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4598155467720685 [2024-06-28 01:06:48,172 INFO L175 Difference]: Start difference. First operand has 219 places, 284 transitions, 3938 flow. Second operand 23 states and 349 transitions. [2024-06-28 01:06:48,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 5081 flow [2024-06-28 01:06:48,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 382 transitions, 4899 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-06-28 01:06:48,240 INFO L231 Difference]: Finished difference. Result has 226 places, 283 transitions, 4100 flow [2024-06-28 01:06:48,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4100, PETRI_PLACES=226, PETRI_TRANSITIONS=283} [2024-06-28 01:06:48,241 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 195 predicate places. [2024-06-28 01:06:48,241 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 283 transitions, 4100 flow [2024-06-28 01:06:48,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:48,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:48,241 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:48,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 01:06:48,242 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:48,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 935005355, now seen corresponding path program 10 times [2024-06-28 01:06:48,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:48,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514683392] [2024-06-28 01:06:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:48,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514683392] [2024-06-28 01:06:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514683392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:48,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:48,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:48,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009481755] [2024-06-28 01:06:48,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:48,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 283 transitions, 4100 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:48,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:49,657 INFO L124 PetriNetUnfolderBase]: 2050/3755 cut-off events. [2024-06-28 01:06:49,657 INFO L125 PetriNetUnfolderBase]: For 21499/21499 co-relation queries the response was YES. [2024-06-28 01:06:49,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17936 conditions, 3755 events. 2050/3755 cut-off events. For 21499/21499 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 25356 event pairs, 230 based on Foata normal form. 1/3756 useless extension candidates. Maximal degree in co-relation 17825. Up to 764 conditions per place. [2024-06-28 01:06:49,684 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 198 selfloop transitions, 156 changer transitions 11/368 dead transitions. [2024-06-28 01:06:49,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 368 transitions, 5148 flow [2024-06-28 01:06:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 01:06:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 01:06:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 312 transitions. [2024-06-28 01:06:49,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-28 01:06:49,686 INFO L175 Difference]: Start difference. First operand has 226 places, 283 transitions, 4100 flow. Second operand 21 states and 312 transitions. [2024-06-28 01:06:49,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 368 transitions, 5148 flow [2024-06-28 01:06:49,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 368 transitions, 4794 flow, removed 5 selfloop flow, removed 22 redundant places. [2024-06-28 01:06:49,757 INFO L231 Difference]: Finished difference. Result has 224 places, 282 transitions, 4059 flow [2024-06-28 01:06:49,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4059, PETRI_PLACES=224, PETRI_TRANSITIONS=282} [2024-06-28 01:06:49,757 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-06-28 01:06:49,758 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 282 transitions, 4059 flow [2024-06-28 01:06:49,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:49,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:49,758 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:49,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 01:06:49,758 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:49,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 265630793, now seen corresponding path program 11 times [2024-06-28 01:06:49,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:49,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426211304] [2024-06-28 01:06:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:49,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426211304] [2024-06-28 01:06:50,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426211304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:50,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505557444] [2024-06-28 01:06:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:50,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:50,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:50,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:50,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:50,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 282 transitions, 4059 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:50,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:50,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:50,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:50,992 INFO L124 PetriNetUnfolderBase]: 2070/3791 cut-off events. [2024-06-28 01:06:50,992 INFO L125 PetriNetUnfolderBase]: For 22117/22118 co-relation queries the response was YES. [2024-06-28 01:06:51,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17980 conditions, 3791 events. 2070/3791 cut-off events. For 22117/22118 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25555 event pairs, 438 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 17869. Up to 1211 conditions per place. [2024-06-28 01:06:51,020 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 206 selfloop transitions, 164 changer transitions 8/381 dead transitions. [2024-06-28 01:06:51,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 381 transitions, 5599 flow [2024-06-28 01:06:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:06:51,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:06:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 249 transitions. [2024-06-28 01:06:51,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44385026737967914 [2024-06-28 01:06:51,036 INFO L175 Difference]: Start difference. First operand has 224 places, 282 transitions, 4059 flow. Second operand 17 states and 249 transitions. [2024-06-28 01:06:51,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 381 transitions, 5599 flow [2024-06-28 01:06:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 381 transitions, 5215 flow, removed 6 selfloop flow, removed 21 redundant places. [2024-06-28 01:06:51,155 INFO L231 Difference]: Finished difference. Result has 230 places, 316 transitions, 4782 flow [2024-06-28 01:06:51,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4782, PETRI_PLACES=230, PETRI_TRANSITIONS=316} [2024-06-28 01:06:51,156 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 199 predicate places. [2024-06-28 01:06:51,157 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 316 transitions, 4782 flow [2024-06-28 01:06:51,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:51,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:51,157 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:51,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 01:06:51,158 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:51,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2132747899, now seen corresponding path program 12 times [2024-06-28 01:06:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215875831] [2024-06-28 01:06:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:51,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:51,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215875831] [2024-06-28 01:06:51,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215875831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:51,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:51,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173987891] [2024-06-28 01:06:51,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:51,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:51,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:51,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:51,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 316 transitions, 4782 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:51,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:51,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:51,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:52,669 INFO L124 PetriNetUnfolderBase]: 2188/4003 cut-off events. [2024-06-28 01:06:52,670 INFO L125 PetriNetUnfolderBase]: For 25902/25902 co-relation queries the response was YES. [2024-06-28 01:06:52,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19626 conditions, 4003 events. 2188/4003 cut-off events. For 25902/25902 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27277 event pairs, 322 based on Foata normal form. 1/4004 useless extension candidates. Maximal degree in co-relation 19505. Up to 1145 conditions per place. [2024-06-28 01:06:52,708 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 203 selfloop transitions, 207 changer transitions 7/420 dead transitions. [2024-06-28 01:06:52,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 420 transitions, 6322 flow [2024-06-28 01:06:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:06:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:06:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 304 transitions. [2024-06-28 01:06:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2024-06-28 01:06:52,709 INFO L175 Difference]: Start difference. First operand has 230 places, 316 transitions, 4782 flow. Second operand 20 states and 304 transitions. [2024-06-28 01:06:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 420 transitions, 6322 flow [2024-06-28 01:06:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 420 transitions, 6236 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:52,830 INFO L231 Difference]: Finished difference. Result has 251 places, 338 transitions, 5537 flow [2024-06-28 01:06:52,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5537, PETRI_PLACES=251, PETRI_TRANSITIONS=338} [2024-06-28 01:06:52,831 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 220 predicate places. [2024-06-28 01:06:52,831 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 338 transitions, 5537 flow [2024-06-28 01:06:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:52,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:52,832 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 01:06:52,833 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:52,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1333707895, now seen corresponding path program 13 times [2024-06-28 01:06:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557418297] [2024-06-28 01:06:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:53,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557418297] [2024-06-28 01:06:53,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557418297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:53,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:53,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:53,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428422301] [2024-06-28 01:06:53,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:53,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:53,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:53,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 338 transitions, 5537 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:53,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:53,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:53,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:54,669 INFO L124 PetriNetUnfolderBase]: 2298/4209 cut-off events. [2024-06-28 01:06:54,670 INFO L125 PetriNetUnfolderBase]: For 32772/32772 co-relation queries the response was YES. [2024-06-28 01:06:54,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 4209 events. 2298/4209 cut-off events. For 32772/32772 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28991 event pairs, 144 based on Foata normal form. 1/4210 useless extension candidates. Maximal degree in co-relation 21604. Up to 719 conditions per place. [2024-06-28 01:06:54,701 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 180 selfloop transitions, 271 changer transitions 7/461 dead transitions. [2024-06-28 01:06:54,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 461 transitions, 7212 flow [2024-06-28 01:06:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 01:06:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 01:06:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 384 transitions. [2024-06-28 01:06:54,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46545454545454545 [2024-06-28 01:06:54,703 INFO L175 Difference]: Start difference. First operand has 251 places, 338 transitions, 5537 flow. Second operand 25 states and 384 transitions. [2024-06-28 01:06:54,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 461 transitions, 7212 flow [2024-06-28 01:06:54,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 461 transitions, 6787 flow, removed 39 selfloop flow, removed 11 redundant places. [2024-06-28 01:06:54,810 INFO L231 Difference]: Finished difference. Result has 270 places, 357 transitions, 6101 flow [2024-06-28 01:06:54,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6101, PETRI_PLACES=270, PETRI_TRANSITIONS=357} [2024-06-28 01:06:54,811 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 239 predicate places. [2024-06-28 01:06:54,811 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 357 transitions, 6101 flow [2024-06-28 01:06:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:54,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:54,811 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:54,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 01:06:54,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:54,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1535866569, now seen corresponding path program 14 times [2024-06-28 01:06:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:54,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871773758] [2024-06-28 01:06:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:54,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871773758] [2024-06-28 01:06:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871773758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:55,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:55,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:55,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346101346] [2024-06-28 01:06:55,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:55,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:55,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:55,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 357 transitions, 6101 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:55,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:55,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:55,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:56,388 INFO L124 PetriNetUnfolderBase]: 2334/4276 cut-off events. [2024-06-28 01:06:56,389 INFO L125 PetriNetUnfolderBase]: For 34449/34449 co-relation queries the response was YES. [2024-06-28 01:06:56,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22527 conditions, 4276 events. 2334/4276 cut-off events. For 34449/34449 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29620 event pairs, 269 based on Foata normal form. 1/4277 useless extension candidates. Maximal degree in co-relation 22398. Up to 1199 conditions per place. [2024-06-28 01:06:56,435 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 220 selfloop transitions, 229 changer transitions 8/460 dead transitions. [2024-06-28 01:06:56,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 460 transitions, 7509 flow [2024-06-28 01:06:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 01:06:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 01:06:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 352 transitions. [2024-06-28 01:06:56,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2024-06-28 01:06:56,437 INFO L175 Difference]: Start difference. First operand has 270 places, 357 transitions, 6101 flow. Second operand 23 states and 352 transitions. [2024-06-28 01:06:56,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 460 transitions, 7509 flow [2024-06-28 01:06:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 460 transitions, 7215 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-28 01:06:56,583 INFO L231 Difference]: Finished difference. Result has 283 places, 362 transitions, 6381 flow [2024-06-28 01:06:56,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6381, PETRI_PLACES=283, PETRI_TRANSITIONS=362} [2024-06-28 01:06:56,583 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 252 predicate places. [2024-06-28 01:06:56,584 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 362 transitions, 6381 flow [2024-06-28 01:06:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:56,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:56,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:56,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 01:06:56,584 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:56,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 745962573, now seen corresponding path program 15 times [2024-06-28 01:06:56,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:56,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780017645] [2024-06-28 01:06:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:56,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780017645] [2024-06-28 01:06:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780017645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:57,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:57,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:57,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421365047] [2024-06-28 01:06:57,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:57,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:57,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:57,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:57,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 362 transitions, 6381 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:57,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:57,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:57,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:58,139 INFO L124 PetriNetUnfolderBase]: 2329/4269 cut-off events. [2024-06-28 01:06:58,139 INFO L125 PetriNetUnfolderBase]: For 36432/36432 co-relation queries the response was YES. [2024-06-28 01:06:58,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22789 conditions, 4269 events. 2329/4269 cut-off events. For 36432/36432 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 29539 event pairs, 138 based on Foata normal form. 1/4270 useless extension candidates. Maximal degree in co-relation 22659. Up to 761 conditions per place. [2024-06-28 01:06:58,185 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 164 selfloop transitions, 276 changer transitions 7/450 dead transitions. [2024-06-28 01:06:58,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 7624 flow [2024-06-28 01:06:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 01:06:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 01:06:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 342 transitions. [2024-06-28 01:06:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505928853754941 [2024-06-28 01:06:58,187 INFO L175 Difference]: Start difference. First operand has 283 places, 362 transitions, 6381 flow. Second operand 23 states and 342 transitions. [2024-06-28 01:06:58,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 7624 flow [2024-06-28 01:06:58,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 450 transitions, 7073 flow, removed 11 selfloop flow, removed 20 redundant places. [2024-06-28 01:06:58,325 INFO L231 Difference]: Finished difference. Result has 286 places, 362 transitions, 6401 flow [2024-06-28 01:06:58,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=6401, PETRI_PLACES=286, PETRI_TRANSITIONS=362} [2024-06-28 01:06:58,326 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 255 predicate places. [2024-06-28 01:06:58,326 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 362 transitions, 6401 flow [2024-06-28 01:06:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:58,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:58,327 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:58,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 01:06:58,327 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:58,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash -302394427, now seen corresponding path program 16 times [2024-06-28 01:06:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:58,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489454160] [2024-06-28 01:06:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:58,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:06:58,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489454160] [2024-06-28 01:06:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489454160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:58,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:58,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:06:58,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673145473] [2024-06-28 01:06:58,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:06:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:06:58,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:06:58,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:58,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 362 transitions, 6401 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:58,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:58,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:58,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:59,952 INFO L124 PetriNetUnfolderBase]: 2380/4353 cut-off events. [2024-06-28 01:06:59,952 INFO L125 PetriNetUnfolderBase]: For 35674/35674 co-relation queries the response was YES. [2024-06-28 01:06:59,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23199 conditions, 4353 events. 2380/4353 cut-off events. For 35674/35674 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30243 event pairs, 317 based on Foata normal form. 1/4354 useless extension candidates. Maximal degree in co-relation 23068. Up to 1297 conditions per place. [2024-06-28 01:06:59,985 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 205 selfloop transitions, 232 changer transitions 8/448 dead transitions. [2024-06-28 01:06:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 448 transitions, 7664 flow [2024-06-28 01:06:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:06:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:06:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 306 transitions. [2024-06-28 01:06:59,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-28 01:06:59,987 INFO L175 Difference]: Start difference. First operand has 286 places, 362 transitions, 6401 flow. Second operand 20 states and 306 transitions. [2024-06-28 01:06:59,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 448 transitions, 7664 flow [2024-06-28 01:07:00,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 448 transitions, 7095 flow, removed 7 selfloop flow, removed 20 redundant places. [2024-06-28 01:07:00,135 INFO L231 Difference]: Finished difference. Result has 286 places, 365 transitions, 6423 flow [2024-06-28 01:07:00,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5850, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6423, PETRI_PLACES=286, PETRI_TRANSITIONS=365} [2024-06-28 01:07:00,137 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 255 predicate places. [2024-06-28 01:07:00,137 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 365 transitions, 6423 flow [2024-06-28 01:07:00,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:00,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 01:07:00,137 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:00,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1751527113, now seen corresponding path program 17 times [2024-06-28 01:07:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839129003] [2024-06-28 01:07:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:00,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:00,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:00,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839129003] [2024-06-28 01:07:00,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839129003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:00,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:00,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:07:00,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011057397] [2024-06-28 01:07:00,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:00,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:07:00,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:07:00,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:07:00,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:00,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 365 transitions, 6423 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:00,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:00,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:00,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:01,835 INFO L124 PetriNetUnfolderBase]: 2387/4365 cut-off events. [2024-06-28 01:07:01,836 INFO L125 PetriNetUnfolderBase]: For 37249/37249 co-relation queries the response was YES. [2024-06-28 01:07:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23170 conditions, 4365 events. 2387/4365 cut-off events. For 37249/37249 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 30274 event pairs, 96 based on Foata normal form. 1/4366 useless extension candidates. Maximal degree in co-relation 23039. Up to 957 conditions per place. [2024-06-28 01:07:01,881 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 147 selfloop transitions, 293 changer transitions 7/450 dead transitions. [2024-06-28 01:07:01,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 450 transitions, 7785 flow [2024-06-28 01:07:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 01:07:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 01:07:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 292 transitions. [2024-06-28 01:07:01,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213564213564214 [2024-06-28 01:07:01,883 INFO L175 Difference]: Start difference. First operand has 286 places, 365 transitions, 6423 flow. Second operand 21 states and 292 transitions. [2024-06-28 01:07:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 450 transitions, 7785 flow [2024-06-28 01:07:02,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 450 transitions, 7340 flow, removed 6 selfloop flow, removed 20 redundant places. [2024-06-28 01:07:02,058 INFO L231 Difference]: Finished difference. Result has 289 places, 376 transitions, 6813 flow [2024-06-28 01:07:02,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6004, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6813, PETRI_PLACES=289, PETRI_TRANSITIONS=376} [2024-06-28 01:07:02,059 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 258 predicate places. [2024-06-28 01:07:02,059 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 376 transitions, 6813 flow [2024-06-28 01:07:02,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:02,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:02,059 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:02,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 01:07:02,059 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:02,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash -938529911, now seen corresponding path program 18 times [2024-06-28 01:07:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:02,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617486999] [2024-06-28 01:07:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617486999] [2024-06-28 01:07:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617486999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:07:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216430184] [2024-06-28 01:07:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:07:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:07:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:07:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:02,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 376 transitions, 6813 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:02,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:02,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:02,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:03,961 INFO L124 PetriNetUnfolderBase]: 2686/4901 cut-off events. [2024-06-28 01:07:03,961 INFO L125 PetriNetUnfolderBase]: For 38687/38687 co-relation queries the response was YES. [2024-06-28 01:07:03,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26245 conditions, 4901 events. 2686/4901 cut-off events. For 38687/38687 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34605 event pairs, 153 based on Foata normal form. 1/4902 useless extension candidates. Maximal degree in co-relation 26113. Up to 841 conditions per place. [2024-06-28 01:07:04,003 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 203 selfloop transitions, 315 changer transitions 8/529 dead transitions. [2024-06-28 01:07:04,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 529 transitions, 8777 flow [2024-06-28 01:07:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-06-28 01:07:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-06-28 01:07:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 436 transitions. [2024-06-28 01:07:04,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4404040404040404 [2024-06-28 01:07:04,006 INFO L175 Difference]: Start difference. First operand has 289 places, 376 transitions, 6813 flow. Second operand 30 states and 436 transitions. [2024-06-28 01:07:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 529 transitions, 8777 flow [2024-06-28 01:07:04,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 529 transitions, 8439 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-28 01:07:04,164 INFO L231 Difference]: Finished difference. Result has 311 places, 402 transitions, 7577 flow [2024-06-28 01:07:04,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6528, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7577, PETRI_PLACES=311, PETRI_TRANSITIONS=402} [2024-06-28 01:07:04,165 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 280 predicate places. [2024-06-28 01:07:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 402 transitions, 7577 flow [2024-06-28 01:07:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 01:07:04,165 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:04,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1564882739, now seen corresponding path program 19 times [2024-06-28 01:07:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357936898] [2024-06-28 01:07:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357936898] [2024-06-28 01:07:04,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357936898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:04,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:04,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:07:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109593063] [2024-06-28 01:07:04,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:07:04,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:04,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:07:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:07:04,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:04,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 402 transitions, 7577 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:04,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:04,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:04,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:05,798 INFO L124 PetriNetUnfolderBase]: 2732/4989 cut-off events. [2024-06-28 01:07:05,798 INFO L125 PetriNetUnfolderBase]: For 40817/40817 co-relation queries the response was YES. [2024-06-28 01:07:05,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27458 conditions, 4989 events. 2732/4989 cut-off events. For 40817/40817 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35319 event pairs, 292 based on Foata normal form. 1/4990 useless extension candidates. Maximal degree in co-relation 27325. Up to 1108 conditions per place. [2024-06-28 01:07:05,849 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 238 selfloop transitions, 235 changer transitions 7/483 dead transitions. [2024-06-28 01:07:05,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 483 transitions, 8950 flow [2024-06-28 01:07:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:07:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:07:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 281 transitions. [2024-06-28 01:07:05,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481658692185008 [2024-06-28 01:07:05,850 INFO L175 Difference]: Start difference. First operand has 311 places, 402 transitions, 7577 flow. Second operand 19 states and 281 transitions. [2024-06-28 01:07:05,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 483 transitions, 8950 flow [2024-06-28 01:07:06,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 483 transitions, 8364 flow, removed 32 selfloop flow, removed 25 redundant places. [2024-06-28 01:07:06,058 INFO L231 Difference]: Finished difference. Result has 307 places, 408 transitions, 7630 flow [2024-06-28 01:07:06,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7019, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7630, PETRI_PLACES=307, PETRI_TRANSITIONS=408} [2024-06-28 01:07:06,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-06-28 01:07:06,060 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 408 transitions, 7630 flow [2024-06-28 01:07:06,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:06,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:06,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:06,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 01:07:06,060 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:06,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1931044553, now seen corresponding path program 20 times [2024-06-28 01:07:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:06,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683015832] [2024-06-28 01:07:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:06,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683015832] [2024-06-28 01:07:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683015832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:06,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:06,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-28 01:07:06,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557081036] [2024-06-28 01:07:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:06,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 01:07:06,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 01:07:06,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:07:06,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:06,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 408 transitions, 7630 flow. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:06,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:06,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:06,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:07,911 INFO L124 PetriNetUnfolderBase]: 2723/4968 cut-off events. [2024-06-28 01:07:07,911 INFO L125 PetriNetUnfolderBase]: For 40685/40685 co-relation queries the response was YES. [2024-06-28 01:07:07,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 4968 events. 2723/4968 cut-off events. For 40685/40685 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35159 event pairs, 144 based on Foata normal form. 1/4969 useless extension candidates. Maximal degree in co-relation 27092. Up to 854 conditions per place. [2024-06-28 01:07:07,958 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 191 selfloop transitions, 334 changer transitions 8/536 dead transitions. [2024-06-28 01:07:07,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 536 transitions, 9152 flow [2024-06-28 01:07:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-28 01:07:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-28 01:07:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 468 transitions. [2024-06-28 01:07:07,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-06-28 01:07:07,963 INFO L175 Difference]: Start difference. First operand has 307 places, 408 transitions, 7630 flow. Second operand 33 states and 468 transitions. [2024-06-28 01:07:07,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 536 transitions, 9152 flow [2024-06-28 01:07:08,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 536 transitions, 8774 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-28 01:07:08,144 INFO L231 Difference]: Finished difference. Result has 327 places, 408 transitions, 7933 flow [2024-06-28 01:07:08,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7933, PETRI_PLACES=327, PETRI_TRANSITIONS=408} [2024-06-28 01:07:08,144 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 296 predicate places. [2024-06-28 01:07:08,145 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 408 transitions, 7933 flow [2024-06-28 01:07:08,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 11 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:08,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:08,145 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:08,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 01:07:08,145 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:08,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash -999425339, now seen corresponding path program 1 times [2024-06-28 01:07:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:08,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914681974] [2024-06-28 01:07:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:08,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:08,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914681974] [2024-06-28 01:07:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914681974] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:08,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298583387] [2024-06-28 01:07:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:08,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:08,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 01:07:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:08,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-28 01:07:08,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:08,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298583387] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:08,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-06-28 01:07:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308866909] [2024-06-28 01:07:08,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:08,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:08,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 408 transitions, 7933 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:08,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:08,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:08,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:09,578 INFO L124 PetriNetUnfolderBase]: 3271/5880 cut-off events. [2024-06-28 01:07:09,578 INFO L125 PetriNetUnfolderBase]: For 48440/48440 co-relation queries the response was YES. [2024-06-28 01:07:09,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34457 conditions, 5880 events. 3271/5880 cut-off events. For 48440/48440 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 40199 event pairs, 1017 based on Foata normal form. 415/6295 useless extension candidates. Maximal degree in co-relation 34332. Up to 1631 conditions per place. [2024-06-28 01:07:09,631 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 570 selfloop transitions, 122 changer transitions 0/695 dead transitions. [2024-06-28 01:07:09,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 695 transitions, 13945 flow [2024-06-28 01:07:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:07:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:07:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 01:07:09,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-28 01:07:09,633 INFO L175 Difference]: Start difference. First operand has 327 places, 408 transitions, 7933 flow. Second operand 7 states and 154 transitions. [2024-06-28 01:07:09,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 695 transitions, 13945 flow [2024-06-28 01:07:09,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 695 transitions, 12633 flow, removed 10 selfloop flow, removed 34 redundant places. [2024-06-28 01:07:09,851 INFO L231 Difference]: Finished difference. Result has 302 places, 456 transitions, 8295 flow [2024-06-28 01:07:09,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8295, PETRI_PLACES=302, PETRI_TRANSITIONS=456} [2024-06-28 01:07:09,852 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-06-28 01:07:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 456 transitions, 8295 flow [2024-06-28 01:07:09,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:09,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:09,853 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:09,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:10,055 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:10,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1359516440, now seen corresponding path program 1 times [2024-06-28 01:07:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102537118] [2024-06-28 01:07:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:10,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102537118] [2024-06-28 01:07:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102537118] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922473334] [2024-06-28 01:07:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:10,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:10,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:10,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 01:07:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:10,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-28 01:07:10,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:10,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922473334] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:10,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-06-28 01:07:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575626920] [2024-06-28 01:07:10,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 01:07:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 01:07:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 01:07:10,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:10,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 456 transitions, 8295 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:10,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:10,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:10,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:11,612 INFO L124 PetriNetUnfolderBase]: 3887/6868 cut-off events. [2024-06-28 01:07:11,613 INFO L125 PetriNetUnfolderBase]: For 51339/51339 co-relation queries the response was YES. [2024-06-28 01:07:11,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41306 conditions, 6868 events. 3887/6868 cut-off events. For 51339/51339 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 45561 event pairs, 556 based on Foata normal form. 573/7441 useless extension candidates. Maximal degree in co-relation 41183. Up to 1881 conditions per place. [2024-06-28 01:07:11,694 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 641 selfloop transitions, 99 changer transitions 0/743 dead transitions. [2024-06-28 01:07:11,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 743 transitions, 14378 flow [2024-06-28 01:07:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:07:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:07:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 01:07:11,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-28 01:07:11,695 INFO L175 Difference]: Start difference. First operand has 302 places, 456 transitions, 8295 flow. Second operand 8 states and 147 transitions. [2024-06-28 01:07:11,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 743 transitions, 14378 flow [2024-06-28 01:07:12,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 743 transitions, 14220 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 01:07:12,062 INFO L231 Difference]: Finished difference. Result has 310 places, 494 transitions, 9093 flow [2024-06-28 01:07:12,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8201, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9093, PETRI_PLACES=310, PETRI_TRANSITIONS=494} [2024-06-28 01:07:12,063 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 279 predicate places. [2024-06-28 01:07:12,064 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 494 transitions, 9093 flow [2024-06-28 01:07:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:12,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:12,064 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:12,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-28 01:07:12,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-06-28 01:07:12,276 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:12,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2055973173, now seen corresponding path program 1 times [2024-06-28 01:07:12,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919593513] [2024-06-28 01:07:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:12,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919593513] [2024-06-28 01:07:12,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919593513] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161136324] [2024-06-28 01:07:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:12,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:12,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:12,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:12,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 01:07:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:12,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 01:07:12,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:12,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:12,891 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-28 01:07:12,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-28 01:07:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161136324] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:12,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2024-06-28 01:07:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200640696] [2024-06-28 01:07:12,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-28 01:07:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-28 01:07:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-06-28 01:07:12,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:12,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 494 transitions, 9093 flow. Second operand has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:12,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:14,499 INFO L124 PetriNetUnfolderBase]: 3957/6984 cut-off events. [2024-06-28 01:07:14,499 INFO L125 PetriNetUnfolderBase]: For 61218/61218 co-relation queries the response was YES. [2024-06-28 01:07:14,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44222 conditions, 6984 events. 3957/6984 cut-off events. For 61218/61218 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 46575 event pairs, 454 based on Foata normal form. 56/7040 useless extension candidates. Maximal degree in co-relation 44095. Up to 1610 conditions per place. [2024-06-28 01:07:14,579 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 203 selfloop transitions, 377 changer transitions 1/584 dead transitions. [2024-06-28 01:07:14,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 584 transitions, 10958 flow [2024-06-28 01:07:14,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:07:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:07:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 263 transitions. [2024-06-28 01:07:14,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2024-06-28 01:07:14,581 INFO L175 Difference]: Start difference. First operand has 310 places, 494 transitions, 9093 flow. Second operand 18 states and 263 transitions. [2024-06-28 01:07:14,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 584 transitions, 10958 flow [2024-06-28 01:07:14,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 584 transitions, 10754 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 01:07:14,977 INFO L231 Difference]: Finished difference. Result has 324 places, 515 transitions, 10129 flow [2024-06-28 01:07:14,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=8832, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10129, PETRI_PLACES=324, PETRI_TRANSITIONS=515} [2024-06-28 01:07:14,977 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 293 predicate places. [2024-06-28 01:07:14,978 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 515 transitions, 10129 flow [2024-06-28 01:07:14,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.8125) internal successors, (157), 16 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:14,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:14,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:14,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:15,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:15,190 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:15,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -554357885, now seen corresponding path program 2 times [2024-06-28 01:07:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301961202] [2024-06-28 01:07:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301961202] [2024-06-28 01:07:15,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301961202] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331717755] [2024-06-28 01:07:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:15,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:15,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 01:07:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:07:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:15,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:07:15,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:15,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:15,901 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-28 01:07:15,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-28 01:07:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:15,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331717755] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:15,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:15,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-06-28 01:07:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279054293] [2024-06-28 01:07:15,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:15,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-28 01:07:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-28 01:07:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-06-28 01:07:15,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:15,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 515 transitions, 10129 flow. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:15,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:15,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:15,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:18,337 INFO L124 PetriNetUnfolderBase]: 4959/8815 cut-off events. [2024-06-28 01:07:18,338 INFO L125 PetriNetUnfolderBase]: For 78925/78925 co-relation queries the response was YES. [2024-06-28 01:07:18,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57435 conditions, 8815 events. 4959/8815 cut-off events. For 78925/78925 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 62053 event pairs, 707 based on Foata normal form. 45/8860 useless extension candidates. Maximal degree in co-relation 57304. Up to 1958 conditions per place. [2024-06-28 01:07:18,481 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 298 selfloop transitions, 399 changer transitions 2/702 dead transitions. [2024-06-28 01:07:18,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 702 transitions, 13345 flow [2024-06-28 01:07:18,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-28 01:07:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-28 01:07:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 377 transitions. [2024-06-28 01:07:18,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476010101010101 [2024-06-28 01:07:18,483 INFO L175 Difference]: Start difference. First operand has 324 places, 515 transitions, 10129 flow. Second operand 24 states and 377 transitions. [2024-06-28 01:07:18,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 702 transitions, 13345 flow [2024-06-28 01:07:19,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 702 transitions, 13019 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-28 01:07:19,081 INFO L231 Difference]: Finished difference. Result has 343 places, 578 transitions, 12199 flow [2024-06-28 01:07:19,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=9624, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=12199, PETRI_PLACES=343, PETRI_TRANSITIONS=578} [2024-06-28 01:07:19,082 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 312 predicate places. [2024-06-28 01:07:19,082 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 578 transitions, 12199 flow [2024-06-28 01:07:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 16 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:19,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:19,083 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:19,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:19,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:19,290 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:19,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1846534256, now seen corresponding path program 1 times [2024-06-28 01:07:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:19,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198103612] [2024-06-28 01:07:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:19,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:19,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198103612] [2024-06-28 01:07:19,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198103612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:19,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:19,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:07:19,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273371179] [2024-06-28 01:07:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:19,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:19,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:19,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 578 transitions, 12199 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:19,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:19,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:19,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:21,617 INFO L124 PetriNetUnfolderBase]: 5014/8953 cut-off events. [2024-06-28 01:07:21,618 INFO L125 PetriNetUnfolderBase]: For 93870/93870 co-relation queries the response was YES. [2024-06-28 01:07:21,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61585 conditions, 8953 events. 5014/8953 cut-off events. For 93870/93870 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 63697 event pairs, 1352 based on Foata normal form. 5/8958 useless extension candidates. Maximal degree in co-relation 61449. Up to 3386 conditions per place. [2024-06-28 01:07:21,781 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 368 selfloop transitions, 260 changer transitions 5/636 dead transitions. [2024-06-28 01:07:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 636 transitions, 13753 flow [2024-06-28 01:07:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 01:07:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 01:07:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 216 transitions. [2024-06-28 01:07:21,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-28 01:07:21,783 INFO L175 Difference]: Start difference. First operand has 343 places, 578 transitions, 12199 flow. Second operand 15 states and 216 transitions. [2024-06-28 01:07:21,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 636 transitions, 13753 flow [2024-06-28 01:07:22,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 636 transitions, 13343 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-28 01:07:22,718 INFO L231 Difference]: Finished difference. Result has 346 places, 580 transitions, 12363 flow [2024-06-28 01:07:22,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11762, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=12363, PETRI_PLACES=346, PETRI_TRANSITIONS=580} [2024-06-28 01:07:22,719 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 315 predicate places. [2024-06-28 01:07:22,719 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 580 transitions, 12363 flow [2024-06-28 01:07:22,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:22,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:22,719 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:22,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 01:07:22,720 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:22,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2006116005, now seen corresponding path program 3 times [2024-06-28 01:07:22,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:22,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373817979] [2024-06-28 01:07:22,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:23,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373817979] [2024-06-28 01:07:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373817979] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:23,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899599889] [2024-06-28 01:07:23,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:23,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:23,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:23,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:23,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 01:07:23,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:07:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:23,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:07:23,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:23,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:23,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-28 01:07:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:23,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:23,502 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-28 01:07:23,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-06-28 01:07:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:23,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899599889] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:23,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 18 [2024-06-28 01:07:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756820859] [2024-06-28 01:07:23,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:23,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-28 01:07:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-28 01:07:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-06-28 01:07:23,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 580 transitions, 12363 flow. Second operand has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:23,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:23,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:26,772 INFO L124 PetriNetUnfolderBase]: 6943/12137 cut-off events. [2024-06-28 01:07:26,772 INFO L125 PetriNetUnfolderBase]: For 133643/133643 co-relation queries the response was YES. [2024-06-28 01:07:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 12137 events. 6943/12137 cut-off events. For 133643/133643 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 88324 event pairs, 1021 based on Foata normal form. 36/12173 useless extension candidates. Maximal degree in co-relation 87461. Up to 3073 conditions per place. [2024-06-28 01:07:26,992 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 319 selfloop transitions, 518 changer transitions 4/844 dead transitions. [2024-06-28 01:07:26,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 844 transitions, 17674 flow [2024-06-28 01:07:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-28 01:07:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-28 01:07:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 420 transitions. [2024-06-28 01:07:26,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 01:07:26,994 INFO L175 Difference]: Start difference. First operand has 346 places, 580 transitions, 12363 flow. Second operand 28 states and 420 transitions. [2024-06-28 01:07:26,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 844 transitions, 17674 flow [2024-06-28 01:07:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 844 transitions, 17437 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:28,058 INFO L231 Difference]: Finished difference. Result has 363 places, 711 transitions, 16577 flow [2024-06-28 01:07:28,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11858, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16577, PETRI_PLACES=363, PETRI_TRANSITIONS=711} [2024-06-28 01:07:28,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 332 predicate places. [2024-06-28 01:07:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 711 transitions, 16577 flow [2024-06-28 01:07:28,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:28,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:28,060 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:28,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:28,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-06-28 01:07:28,273 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:28,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash -416939420, now seen corresponding path program 2 times [2024-06-28 01:07:28,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:28,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344201871] [2024-06-28 01:07:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:28,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:28,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344201871] [2024-06-28 01:07:28,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344201871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:07:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833480229] [2024-06-28 01:07:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:28,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:28,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:28,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 711 transitions, 16577 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:28,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:28,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:28,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:31,429 INFO L124 PetriNetUnfolderBase]: 6933/12132 cut-off events. [2024-06-28 01:07:31,429 INFO L125 PetriNetUnfolderBase]: For 154972/154972 co-relation queries the response was YES. [2024-06-28 01:07:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93493 conditions, 12132 events. 6933/12132 cut-off events. For 154972/154972 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 88224 event pairs, 1776 based on Foata normal form. 5/12137 useless extension candidates. Maximal degree in co-relation 93352. Up to 5151 conditions per place. [2024-06-28 01:07:31,860 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 426 selfloop transitions, 329 changer transitions 3/761 dead transitions. [2024-06-28 01:07:31,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 761 transitions, 18246 flow [2024-06-28 01:07:31,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 01:07:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 01:07:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2024-06-28 01:07:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-28 01:07:31,871 INFO L175 Difference]: Start difference. First operand has 363 places, 711 transitions, 16577 flow. Second operand 14 states and 207 transitions. [2024-06-28 01:07:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 761 transitions, 18246 flow [2024-06-28 01:07:33,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 761 transitions, 17981 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-28 01:07:33,423 INFO L231 Difference]: Finished difference. Result has 366 places, 708 transitions, 16905 flow [2024-06-28 01:07:33,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16268, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=329, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=16905, PETRI_PLACES=366, PETRI_TRANSITIONS=708} [2024-06-28 01:07:33,424 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 335 predicate places. [2024-06-28 01:07:33,425 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 708 transitions, 16905 flow [2024-06-28 01:07:33,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:33,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:33,425 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 01:07:33,425 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:33,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1775324299, now seen corresponding path program 4 times [2024-06-28 01:07:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508339345] [2024-06-28 01:07:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:33,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:33,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508339345] [2024-06-28 01:07:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508339345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:33,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:07:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436112168] [2024-06-28 01:07:33,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:33,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:33,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:33,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:33,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 708 transitions, 16905 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:33,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:33,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:36,881 INFO L124 PetriNetUnfolderBase]: 6863/11985 cut-off events. [2024-06-28 01:07:36,881 INFO L125 PetriNetUnfolderBase]: For 165488/165488 co-relation queries the response was YES. [2024-06-28 01:07:36,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94231 conditions, 11985 events. 6863/11985 cut-off events. For 165488/165488 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86728 event pairs, 2721 based on Foata normal form. 4/11989 useless extension candidates. Maximal degree in co-relation 94091. Up to 7466 conditions per place. [2024-06-28 01:07:37,012 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 576 selfloop transitions, 156 changer transitions 1/736 dead transitions. [2024-06-28 01:07:37,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 736 transitions, 18309 flow [2024-06-28 01:07:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 01:07:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 01:07:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 175 transitions. [2024-06-28 01:07:37,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-28 01:07:37,014 INFO L175 Difference]: Start difference. First operand has 366 places, 708 transitions, 16905 flow. Second operand 12 states and 175 transitions. [2024-06-28 01:07:37,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 736 transitions, 18309 flow [2024-06-28 01:07:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 736 transitions, 17070 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:38,322 INFO L231 Difference]: Finished difference. Result has 356 places, 699 transitions, 15747 flow [2024-06-28 01:07:38,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15458, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15747, PETRI_PLACES=356, PETRI_TRANSITIONS=699} [2024-06-28 01:07:38,323 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-06-28 01:07:38,323 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 699 transitions, 15747 flow [2024-06-28 01:07:38,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:38,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:38,324 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:38,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 01:07:38,324 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:38,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:38,325 INFO L85 PathProgramCache]: Analyzing trace with hash 247905900, now seen corresponding path program 3 times [2024-06-28 01:07:38,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:38,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123986088] [2024-06-28 01:07:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:38,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123986088] [2024-06-28 01:07:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123986088] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326418658] [2024-06-28 01:07:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:38,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:38,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:38,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-28 01:07:38,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:07:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:38,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:07:38,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:38,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:38,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-28 01:07:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:39,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:39,109 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-06-28 01:07:39,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 87 [2024-06-28 01:07:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326418658] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:39,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 01:07:39,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 9] total 18 [2024-06-28 01:07:39,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247023924] [2024-06-28 01:07:39,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:39,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:07:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:07:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-06-28 01:07:39,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:39,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 699 transitions, 15747 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:39,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:39,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:39,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:42,370 INFO L124 PetriNetUnfolderBase]: 7188/12704 cut-off events. [2024-06-28 01:07:42,370 INFO L125 PetriNetUnfolderBase]: For 152600/152600 co-relation queries the response was YES. [2024-06-28 01:07:42,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93660 conditions, 12704 events. 7188/12704 cut-off events. For 152600/152600 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 94555 event pairs, 1514 based on Foata normal form. 28/12732 useless extension candidates. Maximal degree in co-relation 93520. Up to 5333 conditions per place. [2024-06-28 01:07:42,542 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 414 selfloop transitions, 346 changer transitions 0/763 dead transitions. [2024-06-28 01:07:42,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 763 transitions, 17845 flow [2024-06-28 01:07:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:07:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:07:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 01:07:42,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-28 01:07:42,543 INFO L175 Difference]: Start difference. First operand has 356 places, 699 transitions, 15747 flow. Second operand 11 states and 177 transitions. [2024-06-28 01:07:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 763 transitions, 17845 flow [2024-06-28 01:07:44,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 763 transitions, 17644 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:07:44,039 INFO L231 Difference]: Finished difference. Result has 358 places, 712 transitions, 16629 flow [2024-06-28 01:07:44,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15564, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16629, PETRI_PLACES=358, PETRI_TRANSITIONS=712} [2024-06-28 01:07:44,040 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 327 predicate places. [2024-06-28 01:07:44,040 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 712 transitions, 16629 flow [2024-06-28 01:07:44,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:44,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:44,040 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:44,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-28 01:07:44,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:44,250 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)] === [2024-06-28 01:07:44,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1413372405, now seen corresponding path program 5 times [2024-06-28 01:07:44,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:44,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242056662] [2024-06-28 01:07:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:44,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:44,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:44,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242056662] [2024-06-28 01:07:44,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242056662] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:44,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865518950] [2024-06-28 01:07:44,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:07:44,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:44,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:44,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-28 01:07:44,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:07:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:44,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-28 01:07:44,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:44,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:44,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 74 [2024-06-28 01:07:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:44,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:44,938 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:44,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 95 [2024-06-28 01:07:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865518950] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:44,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 01:07:44,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 8] total 20 [2024-06-28 01:07:44,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863605369] [2024-06-28 01:07:44,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:44,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:07:44,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:07:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:07:44,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:44,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 712 transitions, 16629 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:44,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:44,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:44,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:48,566 INFO L124 PetriNetUnfolderBase]: 7693/13740 cut-off events. [2024-06-28 01:07:48,567 INFO L125 PetriNetUnfolderBase]: For 176021/176021 co-relation queries the response was YES. [2024-06-28 01:07:48,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102065 conditions, 13740 events. 7693/13740 cut-off events. For 176021/176021 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 105451 event pairs, 2004 based on Foata normal form. 34/13774 useless extension candidates. Maximal degree in co-relation 101924. Up to 5916 conditions per place. [2024-06-28 01:07:48,894 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 446 selfloop transitions, 341 changer transitions 0/790 dead transitions. [2024-06-28 01:07:48,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 790 transitions, 18973 flow [2024-06-28 01:07:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:07:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:07:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-28 01:07:48,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261707988980716 [2024-06-28 01:07:48,895 INFO L175 Difference]: Start difference. First operand has 358 places, 712 transitions, 16629 flow. Second operand 11 states and 191 transitions. [2024-06-28 01:07:48,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 790 transitions, 18973 flow [2024-06-28 01:07:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 790 transitions, 18668 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-28 01:07:50,438 INFO L231 Difference]: Finished difference. Result has 367 places, 725 transitions, 17734 flow [2024-06-28 01:07:50,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16282, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17734, PETRI_PLACES=367, PETRI_TRANSITIONS=725} [2024-06-28 01:07:50,440 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 336 predicate places. [2024-06-28 01:07:50,440 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 725 transitions, 17734 flow [2024-06-28 01:07:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:07:50,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:50,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:50,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:50,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-06-28 01:07:50,642 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)] === [2024-06-28 01:07:50,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:50,642 INFO L85 PathProgramCache]: Analyzing trace with hash 597071589, now seen corresponding path program 6 times [2024-06-28 01:07:50,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:50,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798282488] [2024-06-28 01:07:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:51,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:51,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798282488] [2024-06-28 01:07:51,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798282488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:51,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:51,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:07:51,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426532942] [2024-06-28 01:07:51,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:51,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:51,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:51,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:51,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 725 transitions, 17734 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:51,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:51,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:51,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:54,732 INFO L124 PetriNetUnfolderBase]: 7689/13745 cut-off events. [2024-06-28 01:07:54,732 INFO L125 PetriNetUnfolderBase]: For 192382/192382 co-relation queries the response was YES. [2024-06-28 01:07:54,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106500 conditions, 13745 events. 7689/13745 cut-off events. For 192382/192382 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 105615 event pairs, 3600 based on Foata normal form. 4/13749 useless extension candidates. Maximal degree in co-relation 106357. Up to 10861 conditions per place. [2024-06-28 01:07:54,927 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 592 selfloop transitions, 162 changer transitions 2/759 dead transitions. [2024-06-28 01:07:54,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 759 transitions, 19339 flow [2024-06-28 01:07:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 01:07:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 01:07:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 182 transitions. [2024-06-28 01:07:54,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 01:07:54,928 INFO L175 Difference]: Start difference. First operand has 367 places, 725 transitions, 17734 flow. Second operand 13 states and 182 transitions. [2024-06-28 01:07:54,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 759 transitions, 19339 flow [2024-06-28 01:07:56,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 759 transitions, 19186 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:07:56,896 INFO L231 Difference]: Finished difference. Result has 371 places, 723 transitions, 17849 flow [2024-06-28 01:07:56,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17549, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17849, PETRI_PLACES=371, PETRI_TRANSITIONS=723} [2024-06-28 01:07:56,897 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 340 predicate places. [2024-06-28 01:07:56,898 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 723 transitions, 17849 flow [2024-06-28 01:07:56,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:56,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:56,898 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:56,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 01:07:56,898 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)] === [2024-06-28 01:07:56,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:56,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1410204405, now seen corresponding path program 7 times [2024-06-28 01:07:56,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:56,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322156426] [2024-06-28 01:07:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:56,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:07:57,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:57,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322156426] [2024-06-28 01:07:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322156426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:07:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:07:57,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:07:57,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199279848] [2024-06-28 01:07:57,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:07:57,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:07:57,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:07:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:07:57,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:57,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 723 transitions, 17849 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:07:57,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:57,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:57,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:00,568 INFO L124 PetriNetUnfolderBase]: 7619/13591 cut-off events. [2024-06-28 01:08:00,569 INFO L125 PetriNetUnfolderBase]: For 195324/195324 co-relation queries the response was YES. [2024-06-28 01:08:00,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106348 conditions, 13591 events. 7619/13591 cut-off events. For 195324/195324 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 104013 event pairs, 3530 based on Foata normal form. 4/13595 useless extension candidates. Maximal degree in co-relation 106207. Up to 10717 conditions per place. [2024-06-28 01:08:00,782 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 588 selfloop transitions, 160 changer transitions 4/755 dead transitions. [2024-06-28 01:08:00,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 755 transitions, 19403 flow [2024-06-28 01:08:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 01:08:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 01:08:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2024-06-28 01:08:00,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 01:08:00,783 INFO L175 Difference]: Start difference. First operand has 371 places, 723 transitions, 17849 flow. Second operand 14 states and 187 transitions. [2024-06-28 01:08:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 755 transitions, 19403 flow [2024-06-28 01:08:02,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 755 transitions, 19230 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 01:08:02,601 INFO L231 Difference]: Finished difference. Result has 372 places, 718 transitions, 17888 flow [2024-06-28 01:08:02,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17601, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17888, PETRI_PLACES=372, PETRI_TRANSITIONS=718} [2024-06-28 01:08:02,602 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 341 predicate places. [2024-06-28 01:08:02,602 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 718 transitions, 17888 flow [2024-06-28 01:08:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:08:02,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:02,602 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:02,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 01:08:02,603 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)] === [2024-06-28 01:08:02,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:02,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1615167298, now seen corresponding path program 4 times [2024-06-28 01:08:02,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957105545] [2024-06-28 01:08:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957105545] [2024-06-28 01:08:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957105545] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143259240] [2024-06-28 01:08:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:08:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:03,004 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-28 01:08:03,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:08:03,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:03,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-28 01:08:03,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:03,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:03,329 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:03,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-28 01:08:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:03,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143259240] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:03,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:03,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-06-28 01:08:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889829792] [2024-06-28 01:08:03,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-28 01:08:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-28 01:08:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-06-28 01:08:03,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:03,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 718 transitions, 17888 flow. Second operand has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:03,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:03,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:03,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:07,067 INFO L124 PetriNetUnfolderBase]: 7644/13769 cut-off events. [2024-06-28 01:08:07,068 INFO L125 PetriNetUnfolderBase]: For 207228/207228 co-relation queries the response was YES. [2024-06-28 01:08:07,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106831 conditions, 13769 events. 7644/13769 cut-off events. For 207228/207228 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 106894 event pairs, 1371 based on Foata normal form. 52/13821 useless extension candidates. Maximal degree in co-relation 106690. Up to 4134 conditions per place. [2024-06-28 01:08:07,240 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 429 selfloop transitions, 384 changer transitions 0/816 dead transitions. [2024-06-28 01:08:07,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 816 transitions, 20463 flow [2024-06-28 01:08:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:08:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:08:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 245 transitions. [2024-06-28 01:08:07,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640151515151515 [2024-06-28 01:08:07,241 INFO L175 Difference]: Start difference. First operand has 372 places, 718 transitions, 17888 flow. Second operand 16 states and 245 transitions. [2024-06-28 01:08:07,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 816 transitions, 20463 flow [2024-06-28 01:08:08,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 816 transitions, 20001 flow, removed 10 selfloop flow, removed 17 redundant places. [2024-06-28 01:08:08,984 INFO L231 Difference]: Finished difference. Result has 370 places, 750 transitions, 19043 flow [2024-06-28 01:08:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=17366, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19043, PETRI_PLACES=370, PETRI_TRANSITIONS=750} [2024-06-28 01:08:08,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 339 predicate places. [2024-06-28 01:08:08,985 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 750 transitions, 19043 flow [2024-06-28 01:08:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:09,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:09,080 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:09,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:09,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-28 01:08:09,280 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:09,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash -352594315, now seen corresponding path program 8 times [2024-06-28 01:08:09,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:09,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614869036] [2024-06-28 01:08:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:09,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:09,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:09,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614869036] [2024-06-28 01:08:09,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614869036] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:09,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599331152] [2024-06-28 01:08:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:08:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:09,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-28 01:08:09,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:08:09,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:09,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:08:09,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:09,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:08:09,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-28 01:08:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:09,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:09,988 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:09,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-28 01:08:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599331152] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:10,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 17 [2024-06-28 01:08:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452354431] [2024-06-28 01:08:10,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-28 01:08:10,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-28 01:08:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-06-28 01:08:10,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:10,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 750 transitions, 19043 flow. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:10,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:10,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:10,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:13,953 INFO L124 PetriNetUnfolderBase]: 7770/14001 cut-off events. [2024-06-28 01:08:13,954 INFO L125 PetriNetUnfolderBase]: For 223767/223767 co-relation queries the response was YES. [2024-06-28 01:08:14,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111631 conditions, 14001 events. 7770/14001 cut-off events. For 223767/223767 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 109157 event pairs, 1791 based on Foata normal form. 36/14037 useless extension candidates. Maximal degree in co-relation 111489. Up to 5453 conditions per place. [2024-06-28 01:08:14,115 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 375 selfloop transitions, 481 changer transitions 1/860 dead transitions. [2024-06-28 01:08:14,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 860 transitions, 21758 flow [2024-06-28 01:08:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-28 01:08:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-28 01:08:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 323 transitions. [2024-06-28 01:08:14,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44490358126721763 [2024-06-28 01:08:14,116 INFO L175 Difference]: Start difference. First operand has 370 places, 750 transitions, 19043 flow. Second operand 22 states and 323 transitions. [2024-06-28 01:08:14,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 860 transitions, 21758 flow [2024-06-28 01:08:16,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 860 transitions, 21322 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 01:08:16,302 INFO L231 Difference]: Finished difference. Result has 387 places, 774 transitions, 20633 flow [2024-06-28 01:08:16,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=18531, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=20633, PETRI_PLACES=387, PETRI_TRANSITIONS=774} [2024-06-28 01:08:16,303 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 356 predicate places. [2024-06-28 01:08:16,304 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 774 transitions, 20633 flow [2024-06-28 01:08:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:16,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:16,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:16,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:16,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-28 01:08:16,516 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:16,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash -615760502, now seen corresponding path program 5 times [2024-06-28 01:08:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408442493] [2024-06-28 01:08:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:16,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408442493] [2024-06-28 01:08:16,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408442493] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:16,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343306262] [2024-06-28 01:08:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:08:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:16,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-28 01:08:17,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:08:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:17,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:08:17,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:17,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:08:17,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 70 [2024-06-28 01:08:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:17,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:17,387 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:17,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-28 01:08:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343306262] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:17,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 17 [2024-06-28 01:08:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920561903] [2024-06-28 01:08:17,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-28 01:08:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-28 01:08:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-06-28 01:08:17,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 774 transitions, 20633 flow. Second operand has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:21,668 INFO L124 PetriNetUnfolderBase]: 7664/13867 cut-off events. [2024-06-28 01:08:21,669 INFO L125 PetriNetUnfolderBase]: For 239919/239919 co-relation queries the response was YES. [2024-06-28 01:08:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115100 conditions, 13867 events. 7664/13867 cut-off events. For 239919/239919 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 108292 event pairs, 1188 based on Foata normal form. 30/13897 useless extension candidates. Maximal degree in co-relation 114956. Up to 3876 conditions per place. [2024-06-28 01:08:22,027 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 395 selfloop transitions, 479 changer transitions 1/878 dead transitions. [2024-06-28 01:08:22,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 878 transitions, 23149 flow [2024-06-28 01:08:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 01:08:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 01:08:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 329 transitions. [2024-06-28 01:08:22,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43346508563899866 [2024-06-28 01:08:22,028 INFO L175 Difference]: Start difference. First operand has 387 places, 774 transitions, 20633 flow. Second operand 23 states and 329 transitions. [2024-06-28 01:08:22,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 878 transitions, 23149 flow [2024-06-28 01:08:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 878 transitions, 22945 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-28 01:08:24,352 INFO L231 Difference]: Finished difference. Result has 398 places, 788 transitions, 22013 flow [2024-06-28 01:08:24,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20302, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=22013, PETRI_PLACES=398, PETRI_TRANSITIONS=788} [2024-06-28 01:08:24,353 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 367 predicate places. [2024-06-28 01:08:24,354 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 788 transitions, 22013 flow [2024-06-28 01:08:24,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:24,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:24,354 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:24,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-28 01:08:24,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-06-28 01:08:24,567 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:24,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1221316658, now seen corresponding path program 6 times [2024-06-28 01:08:24,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:24,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852292537] [2024-06-28 01:08:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852292537] [2024-06-28 01:08:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852292537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:08:24,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:08:24,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:08:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704697427] [2024-06-28 01:08:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:08:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:08:24,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:08:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:08:24,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:24,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 788 transitions, 22013 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:08:24,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:24,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:24,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:28,791 INFO L124 PetriNetUnfolderBase]: 7584/13704 cut-off events. [2024-06-28 01:08:28,792 INFO L125 PetriNetUnfolderBase]: For 258387/258387 co-relation queries the response was YES. [2024-06-28 01:08:28,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118458 conditions, 13704 events. 7584/13704 cut-off events. For 258387/258387 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 106694 event pairs, 3870 based on Foata normal form. 5/13709 useless extension candidates. Maximal degree in co-relation 118313. Up to 11342 conditions per place. [2024-06-28 01:08:28,982 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 721 selfloop transitions, 82 changer transitions 3/809 dead transitions. [2024-06-28 01:08:28,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 809 transitions, 23503 flow [2024-06-28 01:08:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:08:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:08:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-28 01:08:28,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43526170798898073 [2024-06-28 01:08:28,984 INFO L175 Difference]: Start difference. First operand has 398 places, 788 transitions, 22013 flow. Second operand 11 states and 158 transitions. [2024-06-28 01:08:28,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 809 transitions, 23503 flow [2024-06-28 01:08:31,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 809 transitions, 22947 flow, removed 15 selfloop flow, removed 17 redundant places. [2024-06-28 01:08:31,348 INFO L231 Difference]: Finished difference. Result has 389 places, 779 transitions, 21387 flow [2024-06-28 01:08:31,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21245, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21387, PETRI_PLACES=389, PETRI_TRANSITIONS=779} [2024-06-28 01:08:31,349 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 358 predicate places. [2024-06-28 01:08:31,350 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 779 transitions, 21387 flow [2024-06-28 01:08:31,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:08:31,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:31,350 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:31,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 01:08:31,350 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:31,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash -639006945, now seen corresponding path program 9 times [2024-06-28 01:08:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:31,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295924904] [2024-06-28 01:08:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295924904] [2024-06-28 01:08:31,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295924904] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292897059] [2024-06-28 01:08:31,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:08:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:31,742 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:31,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-28 01:08:31,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:08:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:31,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjunts are in the unsatisfiable core [2024-06-28 01:08:31,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:32,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:32,173 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:32,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-06-28 01:08:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:32,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292897059] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:32,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:32,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2024-06-28 01:08:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976956982] [2024-06-28 01:08:32,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 01:08:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 01:08:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-06-28 01:08:32,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:32,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 779 transitions, 21387 flow. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:32,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:32,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:32,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:36,135 INFO L124 PetriNetUnfolderBase]: 7332/13169 cut-off events. [2024-06-28 01:08:36,136 INFO L125 PetriNetUnfolderBase]: For 253696/253696 co-relation queries the response was YES. [2024-06-28 01:08:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113638 conditions, 13169 events. 7332/13169 cut-off events. For 253696/253696 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 100756 event pairs, 1752 based on Foata normal form. 60/13229 useless extension candidates. Maximal degree in co-relation 113497. Up to 5130 conditions per place. [2024-06-28 01:08:36,309 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 435 selfloop transitions, 435 changer transitions 0/873 dead transitions. [2024-06-28 01:08:36,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 873 transitions, 23826 flow [2024-06-28 01:08:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:08:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:08:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 277 transitions. [2024-06-28 01:08:36,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2024-06-28 01:08:36,310 INFO L175 Difference]: Start difference. First operand has 389 places, 779 transitions, 21387 flow. Second operand 18 states and 277 transitions. [2024-06-28 01:08:36,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 873 transitions, 23826 flow [2024-06-28 01:08:38,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 873 transitions, 23678 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 01:08:38,406 INFO L231 Difference]: Finished difference. Result has 400 places, 794 transitions, 22844 flow [2024-06-28 01:08:38,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21145, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22844, PETRI_PLACES=400, PETRI_TRANSITIONS=794} [2024-06-28 01:08:38,407 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 369 predicate places. [2024-06-28 01:08:38,407 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 794 transitions, 22844 flow [2024-06-28 01:08:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:08:38,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:38,408 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:38,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:38,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:38,621 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:38,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 926701827, now seen corresponding path program 10 times [2024-06-28 01:08:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505001934] [2024-06-28 01:08:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:38,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-06-28 01:08:38,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:38,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505001934] [2024-06-28 01:08:38,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505001934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:08:38,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:08:38,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 01:08:38,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118132605] [2024-06-28 01:08:38,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:08:38,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:08:38,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:08:38,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:08:38,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:38,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 794 transitions, 22844 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 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) [2024-06-28 01:08:38,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:38,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:38,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:42,770 INFO L124 PetriNetUnfolderBase]: 7264/13036 cut-off events. [2024-06-28 01:08:42,771 INFO L125 PetriNetUnfolderBase]: For 265491/265491 co-relation queries the response was YES. [2024-06-28 01:08:42,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117146 conditions, 13036 events. 7264/13036 cut-off events. For 265491/265491 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 99489 event pairs, 3598 based on Foata normal form. 4/13040 useless extension candidates. Maximal degree in co-relation 116999. Up to 10863 conditions per place. [2024-06-28 01:08:42,964 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 668 selfloop transitions, 136 changer transitions 2/809 dead transitions. [2024-06-28 01:08:42,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 809 transitions, 24298 flow [2024-06-28 01:08:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:08:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:08:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-28 01:08:42,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 01:08:42,965 INFO L175 Difference]: Start difference. First operand has 400 places, 794 transitions, 22844 flow. Second operand 11 states and 154 transitions. [2024-06-28 01:08:42,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 809 transitions, 24298 flow