./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/test-easy6.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/test-easy6.wvr.c ./goblint.2024-06-19_11-23-25.files/protection/test-easy6.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 [2024-06-27 18:04:39,163 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:04:39,245 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:04:39,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:04:39,252 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:04:39,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:04:39,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:04:39,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:04:39,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:04:39,275 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:04:39,275 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:04:39,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:04:39,276 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:04:39,277 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:04:39,277 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:04:39,278 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:04:39,278 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:04:39,278 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:04:39,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:04:39,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:04:39,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:04:39,280 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:04:39,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:04:39,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:04:39,280 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:04:39,280 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:04:39,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:04:39,281 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:04:39,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:04:39,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:04:39,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:04:39,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:04:39,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:04:39,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:04:39,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:04:39,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:04:39,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:04:39,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:04:39,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:04:39,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:04:39,284 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:04:39,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:04:39,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:04:39,284 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:04:39,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:04:39,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:04:39,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:04:39,533 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:04:39,534 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:04:39,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/test-easy6.wvr.yml/witness.yml [2024-06-27 18:04:39,661 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:04:39,662 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:04:39,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy6.wvr.c [2024-06-27 18:04:40,741 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:04:40,912 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:04:40,913 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy6.wvr.c [2024-06-27 18:04:40,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0204f9477/8c84af734dde476aaee99a7c3bb1263b/FLAGe84cd20d1 [2024-06-27 18:04:40,937 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0204f9477/8c84af734dde476aaee99a7c3bb1263b [2024-06-27 18:04:40,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:04:40,940 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:04:40,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:04:40,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:04:40,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:04:40,949 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:39" (1/2) ... [2024-06-27 18:04:40,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cc7afa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,952 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:39" (1/2) ... [2024-06-27 18:04:40,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f898b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,953 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:04:40" (2/2) ... [2024-06-27 18:04:40,954 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cc7afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:40, skipping insertion in model container [2024-06-27 18:04:40,954 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:04:40" (2/2) ... [2024-06-27 18:04:40,954 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:04:40,980 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:04:40,981 INFO L97 edCorrectnessWitness]: Location invariant before [L112-L112] ((((((! multithreaded || 0 <= tmp2) && (! multithreaded || 0 <= n1)) && (! multithreaded || 0 <= i2)) && (! multithreaded || 0 <= tmp1)) && (! multithreaded || 0 <= i)) && (! multithreaded || 0 <= i1)) && (! multithreaded || 0 <= n2) [2024-06-27 18:04:40,981 INFO L97 edCorrectnessWitness]: Location invariant before [L111-L111] ((((((! multithreaded || 0 <= tmp2) && (! multithreaded || 0 <= n1)) && (! multithreaded || 0 <= i2)) && (! multithreaded || 0 <= tmp1)) && (! multithreaded || 0 <= i)) && (! multithreaded || 0 <= i1)) && (! multithreaded || 0 <= n2) [2024-06-27 18:04:40,982 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:04:40,982 INFO L106 edCorrectnessWitness]: ghost_update [L110-L110] multithreaded = 1; [2024-06-27 18:04:41,002 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:04:41,180 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/test-easy6.wvr.c[3072,3085] [2024-06-27 18:04:41,185 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:04:41,193 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:04:41,258 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/test-easy6.wvr.c[3072,3085] [2024-06-27 18:04:41,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:04:41,273 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:04:41,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41 WrapperNode [2024-06-27 18:04:41,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:04:41,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:04:41,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:04:41,275 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:04:41,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,315 INFO L138 Inliner]: procedures = 20, calls = 49, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 117 [2024-06-27 18:04:41,316 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:04:41,316 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:04:41,316 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:04:41,316 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:04:41,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,328 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,349 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 18:04:41,350 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,350 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,359 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:04:41,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:04:41,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:04:41,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:04:41,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (1/1) ... [2024-06-27 18:04:41,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:04:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:04:41,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:04:41,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:04:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:04:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 18:04:41,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 18:04:41,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 18:04:41,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 18:04:41,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:04:41,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:04:41,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:04:41,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:04:41,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:04:41,439 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:04:41,505 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:04:41,506 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:04:41,697 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:04:41,697 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:04:41,808 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:04:41,808 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:04:41,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:04:41 BoogieIcfgContainer [2024-06-27 18:04:41,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:04:41,810 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:04:41,810 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:04:41,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:04:41,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:04:39" (1/4) ... [2024-06-27 18:04:41,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af76159 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:04:41, skipping insertion in model container [2024-06-27 18:04:41,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:04:40" (2/4) ... [2024-06-27 18:04:41,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af76159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:04:41, skipping insertion in model container [2024-06-27 18:04:41,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:04:41" (3/4) ... [2024-06-27 18:04:41,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af76159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:04:41, skipping insertion in model container [2024-06-27 18:04:41,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:04:41" (4/4) ... [2024-06-27 18:04:41,816 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy6.wvr.c [2024-06-27 18:04:41,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:04:41,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 18:04:41,829 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:04:41,866 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 18:04:41,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 39 transitions, 92 flow [2024-06-27 18:04:41,912 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 18:04:41,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 18:04:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 0/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2024-06-27 18:04:41,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 39 transitions, 92 flow [2024-06-27 18:04:41,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 36 transitions, 84 flow [2024-06-27 18:04:41,930 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:04:41,936 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;@74f8cd21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:04:41,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 18:04:41,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:04:41,943 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:04:41,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:04:41,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:41,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:04:41,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:41,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash 244599668, now seen corresponding path program 1 times [2024-06-27 18:04:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850497295] [2024-06-27 18:04:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:41,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850497295] [2024-06-27 18:04:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850497295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:04:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735347225] [2024-06-27 18:04:42,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:04:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:04:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:04:42,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:04:42,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:42,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:04:42,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,537 INFO L124 PetriNetUnfolderBase]: 161/384 cut-off events. [2024-06-27 18:04:42,537 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-27 18:04:42,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 384 events. 161/384 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1813 event pairs, 67 based on Foata normal form. 3/368 useless extension candidates. Maximal degree in co-relation 668. Up to 287 conditions per place. [2024-06-27 18:04:42,544 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 26 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2024-06-27 18:04:42,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 161 flow [2024-06-27 18:04:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:04:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:04:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 18:04:42,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-27 18:04:42,556 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 84 flow. Second operand 3 states and 82 transitions. [2024-06-27 18:04:42,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 161 flow [2024-06-27 18:04:42,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:42,564 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 97 flow [2024-06-27 18:04:42,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-06-27 18:04:42,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-27 18:04:42,569 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 97 flow [2024-06-27 18:04:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:42,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:42,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:42,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:04:42,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:42,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1675204725, now seen corresponding path program 1 times [2024-06-27 18:04:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:42,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111629444] [2024-06-27 18:04:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:42,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:42,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111629444] [2024-06-27 18:04:42,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111629444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:42,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:42,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:04:42,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749038982] [2024-06-27 18:04:42,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:42,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:04:42,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:04:42,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:04:42,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:04:42,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:42,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:42,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:04:42,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:42,892 INFO L124 PetriNetUnfolderBase]: 154/372 cut-off events. [2024-06-27 18:04:42,892 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-06-27 18:04:42,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 372 events. 154/372 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1740 event pairs, 66 based on Foata normal form. 4/358 useless extension candidates. Maximal degree in co-relation 629. Up to 257 conditions per place. [2024-06-27 18:04:42,898 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 27 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 18:04:42,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 178 flow [2024-06-27 18:04:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:04:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:04:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-27 18:04:42,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7094017094017094 [2024-06-27 18:04:42,902 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 97 flow. Second operand 3 states and 83 transitions. [2024-06-27 18:04:42,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 178 flow [2024-06-27 18:04:42,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:42,906 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 120 flow [2024-06-27 18:04:42,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-06-27 18:04:42,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-06-27 18:04:42,907 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 120 flow [2024-06-27 18:04:42,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:42,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:42,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:42,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:04:42,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:42,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -391219088, now seen corresponding path program 1 times [2024-06-27 18:04:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:42,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054958271] [2024-06-27 18:04:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:42,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054958271] [2024-06-27 18:04:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054958271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:04:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260465022] [2024-06-27 18:04:43,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:04:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:04:43,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:04:43,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 39 [2024-06-27 18:04:43,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 39 [2024-06-27 18:04:43,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,187 INFO L124 PetriNetUnfolderBase]: 232/503 cut-off events. [2024-06-27 18:04:43,187 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-06-27 18:04:43,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 503 events. 232/503 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2365 event pairs, 91 based on Foata normal form. 15/506 useless extension candidates. Maximal degree in co-relation 470. Up to 339 conditions per place. [2024-06-27 18:04:43,190 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 40 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:04:43,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 257 flow [2024-06-27 18:04:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:04:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:04:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-27 18:04:43,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-27 18:04:43,194 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 120 flow. Second operand 4 states and 103 transitions. [2024-06-27 18:04:43,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 257 flow [2024-06-27 18:04:43,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:43,196 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 158 flow [2024-06-27 18:04:43,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-06-27 18:04:43,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-27 18:04:43,197 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 158 flow [2024-06-27 18:04:43,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:43,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:04:43,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2070924242, now seen corresponding path program 1 times [2024-06-27 18:04:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152233094] [2024-06-27 18:04:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:43,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152233094] [2024-06-27 18:04:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152233094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:04:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261921541] [2024-06-27 18:04:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:04:43,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:04:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:04:43,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 39 [2024-06-27 18:04:43,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 39 [2024-06-27 18:04:43,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,483 INFO L124 PetriNetUnfolderBase]: 299/624 cut-off events. [2024-06-27 18:04:43,483 INFO L125 PetriNetUnfolderBase]: For 503/506 co-relation queries the response was YES. [2024-06-27 18:04:43,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 624 events. 299/624 cut-off events. For 503/506 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3030 event pairs, 90 based on Foata normal form. 12/619 useless extension candidates. Maximal degree in co-relation 676. Up to 340 conditions per place. [2024-06-27 18:04:43,487 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 50 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 18:04:43,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 357 flow [2024-06-27 18:04:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 18:04:43,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6461538461538462 [2024-06-27 18:04:43,490 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 158 flow. Second operand 5 states and 126 transitions. [2024-06-27 18:04:43,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 357 flow [2024-06-27 18:04:43,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 349 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:43,497 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 209 flow [2024-06-27 18:04:43,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=5, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 18:04:43,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 18:04:43,499 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 209 flow [2024-06-27 18:04:43,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:04:43,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -761277154, now seen corresponding path program 1 times [2024-06-27 18:04:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500049884] [2024-06-27 18:04:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:43,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500049884] [2024-06-27 18:04:43,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500049884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:43,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:43,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:43,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375477430] [2024-06-27 18:04:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:43,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:43,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:43,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:43,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:43,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:43,977 INFO L124 PetriNetUnfolderBase]: 433/878 cut-off events. [2024-06-27 18:04:43,978 INFO L125 PetriNetUnfolderBase]: For 1015/1021 co-relation queries the response was YES. [2024-06-27 18:04:43,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 878 events. 433/878 cut-off events. For 1015/1021 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4560 event pairs, 114 based on Foata normal form. 16/884 useless extension candidates. Maximal degree in co-relation 1333. Up to 562 conditions per place. [2024-06-27 18:04:43,984 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-06-27 18:04:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 394 flow [2024-06-27 18:04:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-27 18:04:43,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2024-06-27 18:04:43,986 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 209 flow. Second operand 5 states and 112 transitions. [2024-06-27 18:04:43,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 394 flow [2024-06-27 18:04:43,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 384 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:43,991 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 262 flow [2024-06-27 18:04:43,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 18:04:43,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 18:04:43,995 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 262 flow [2024-06-27 18:04:43,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:43,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:43,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:43,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:04:43,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:43,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1588304883, now seen corresponding path program 1 times [2024-06-27 18:04:43,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:43,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781236726] [2024-06-27 18:04:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:43,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:44,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781236726] [2024-06-27 18:04:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781236726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:44,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635491838] [2024-06-27 18:04:44,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:44,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:44,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-27 18:04:44,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-27 18:04:44,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,336 INFO L124 PetriNetUnfolderBase]: 335/679 cut-off events. [2024-06-27 18:04:44,336 INFO L125 PetriNetUnfolderBase]: For 1369/1378 co-relation queries the response was YES. [2024-06-27 18:04:44,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 679 events. 335/679 cut-off events. For 1369/1378 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3276 event pairs, 125 based on Foata normal form. 12/675 useless extension candidates. Maximal degree in co-relation 1040. Up to 495 conditions per place. [2024-06-27 18:04:44,340 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 52 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-27 18:04:44,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 437 flow [2024-06-27 18:04:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-27 18:04:44,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846153846153846 [2024-06-27 18:04:44,342 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 262 flow. Second operand 5 states and 114 transitions. [2024-06-27 18:04:44,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 437 flow [2024-06-27 18:04:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 415 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:44,345 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 292 flow [2024-06-27 18:04:44,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-27 18:04:44,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-27 18:04:44,346 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 292 flow [2024-06-27 18:04:44,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:44,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:44,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:04:44,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1623892206, now seen corresponding path program 1 times [2024-06-27 18:04:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234690817] [2024-06-27 18:04:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234690817] [2024-06-27 18:04:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234690817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:04:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037739479] [2024-06-27 18:04:44,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:04:44,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:04:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:04:44,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-27 18:04:44,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:44,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-27 18:04:44,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,571 INFO L124 PetriNetUnfolderBase]: 348/704 cut-off events. [2024-06-27 18:04:44,571 INFO L125 PetriNetUnfolderBase]: For 1564/1564 co-relation queries the response was YES. [2024-06-27 18:04:44,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 704 events. 348/704 cut-off events. For 1564/1564 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3406 event pairs, 170 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 1527. Up to 589 conditions per place. [2024-06-27 18:04:44,577 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 49 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-27 18:04:44,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 71 transitions, 463 flow [2024-06-27 18:04:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 18:04:44,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2024-06-27 18:04:44,579 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 292 flow. Second operand 5 states and 107 transitions. [2024-06-27 18:04:44,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 71 transitions, 463 flow [2024-06-27 18:04:44,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 442 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:44,583 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 314 flow [2024-06-27 18:04:44,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-27 18:04:44,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-27 18:04:44,584 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 314 flow [2024-06-27 18:04:44,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:44,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:44,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:04:44,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1500456861, now seen corresponding path program 1 times [2024-06-27 18:04:44,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542835196] [2024-06-27 18:04:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:44,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542835196] [2024-06-27 18:04:44,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542835196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:44,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260365589] [2024-06-27 18:04:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:44,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:44,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-27 18:04:44,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,862 INFO L124 PetriNetUnfolderBase]: 398/774 cut-off events. [2024-06-27 18:04:44,862 INFO L125 PetriNetUnfolderBase]: For 2122/2122 co-relation queries the response was YES. [2024-06-27 18:04:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 774 events. 398/774 cut-off events. For 2122/2122 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3618 event pairs, 204 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 1864. Up to 673 conditions per place. [2024-06-27 18:04:44,867 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 52 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-27 18:04:44,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 475 flow [2024-06-27 18:04:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:04:44,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:04:44,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 18:04:44,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5282051282051282 [2024-06-27 18:04:44,869 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 314 flow. Second operand 5 states and 103 transitions. [2024-06-27 18:04:44,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 475 flow [2024-06-27 18:04:44,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 465 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:44,873 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 346 flow [2024-06-27 18:04:44,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-06-27 18:04:44,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 18:04:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 346 flow [2024-06-27 18:04:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 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) [2024-06-27 18:04:44,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:44,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:04:44,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 220223724, now seen corresponding path program 1 times [2024-06-27 18:04:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106995613] [2024-06-27 18:04:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:44,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:44,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106995613] [2024-06-27 18:04:44,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106995613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:44,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:44,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:04:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708355504] [2024-06-27 18:04:44,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:04:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:04:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:04:44,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2024-06-27 18:04:44,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2024-06-27 18:04:44,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:44,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2024-06-27 18:04:44,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:44,954 INFO L124 PetriNetUnfolderBase]: 165/444 cut-off events. [2024-06-27 18:04:44,954 INFO L125 PetriNetUnfolderBase]: For 775/798 co-relation queries the response was YES. [2024-06-27 18:04:44,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 444 events. 165/444 cut-off events. For 775/798 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2402 event pairs, 111 based on Foata normal form. 11/440 useless extension candidates. Maximal degree in co-relation 1110. Up to 223 conditions per place. [2024-06-27 18:04:44,958 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 19 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-06-27 18:04:44,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 397 flow [2024-06-27 18:04:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:04:44,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:04:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-27 18:04:44,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2024-06-27 18:04:44,961 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 346 flow. Second operand 3 states and 85 transitions. [2024-06-27 18:04:44,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 397 flow [2024-06-27 18:04:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 389 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:44,966 INFO L231 Difference]: Finished difference. Result has 72 places, 62 transitions, 346 flow [2024-06-27 18:04:44,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=72, PETRI_TRANSITIONS=62} [2024-06-27 18:04:44,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-27 18:04:44,967 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 62 transitions, 346 flow [2024-06-27 18:04:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2024-06-27 18:04:44,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:44,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:04:44,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:44,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:44,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1520051111, now seen corresponding path program 1 times [2024-06-27 18:04:44,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356483500] [2024-06-27 18:04:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:44,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:45,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356483500] [2024-06-27 18:04:45,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356483500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:04:45,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534817578] [2024-06-27 18:04:45,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:04:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:04:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:04:45,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 39 [2024-06-27 18:04:45,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2024-06-27 18:04:45,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 39 [2024-06-27 18:04:45,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,062 INFO L124 PetriNetUnfolderBase]: 167/470 cut-off events. [2024-06-27 18:04:45,062 INFO L125 PetriNetUnfolderBase]: For 897/914 co-relation queries the response was YES. [2024-06-27 18:04:45,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 470 events. 167/470 cut-off events. For 897/914 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2526 event pairs, 107 based on Foata normal form. 6/457 useless extension candidates. Maximal degree in co-relation 1035. Up to 216 conditions per place. [2024-06-27 18:04:45,066 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 21 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-06-27 18:04:45,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 405 flow [2024-06-27 18:04:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:04:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:04:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-27 18:04:45,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7435897435897436 [2024-06-27 18:04:45,067 INFO L175 Difference]: Start difference. First operand has 72 places, 62 transitions, 346 flow. Second operand 3 states and 87 transitions. [2024-06-27 18:04:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 405 flow [2024-06-27 18:04:45,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 68 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:45,071 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 350 flow [2024-06-27 18:04:45,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-06-27 18:04:45,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 18:04:45,072 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 350 flow [2024-06-27 18:04:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2024-06-27 18:04:45,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:04:45,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,073 INFO L85 PathProgramCache]: Analyzing trace with hash 212631081, now seen corresponding path program 2 times [2024-06-27 18:04:45,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519879116] [2024-06-27 18:04:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:45,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519879116] [2024-06-27 18:04:45,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519879116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485596909] [2024-06-27 18:04:45,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:45,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:45,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-27 18:04:45,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:45,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-27 18:04:45,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,380 INFO L124 PetriNetUnfolderBase]: 365/754 cut-off events. [2024-06-27 18:04:45,381 INFO L125 PetriNetUnfolderBase]: For 2527/2536 co-relation queries the response was YES. [2024-06-27 18:04:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2593 conditions, 754 events. 365/754 cut-off events. For 2527/2536 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3580 event pairs, 154 based on Foata normal form. 8/751 useless extension candidates. Maximal degree in co-relation 1841. Up to 602 conditions per place. [2024-06-27 18:04:45,386 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 54 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-27 18:04:45,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 601 flow [2024-06-27 18:04:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 18:04:45,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-27 18:04:45,387 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 350 flow. Second operand 6 states and 130 transitions. [2024-06-27 18:04:45,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 601 flow [2024-06-27 18:04:45,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 597 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:45,392 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 450 flow [2024-06-27 18:04:45,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=450, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2024-06-27 18:04:45,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-27 18:04:45,393 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 450 flow [2024-06-27 18:04:45,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:45,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:45,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:04:45,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash -731060929, now seen corresponding path program 3 times [2024-06-27 18:04:45,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541355702] [2024-06-27 18:04:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:45,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541355702] [2024-06-27 18:04:45,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541355702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:04:45,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858315249] [2024-06-27 18:04:45,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:45,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:45,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:45,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 39 [2024-06-27 18:04:45,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:45,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 39 [2024-06-27 18:04:45,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:45,656 INFO L124 PetriNetUnfolderBase]: 359/746 cut-off events. [2024-06-27 18:04:45,656 INFO L125 PetriNetUnfolderBase]: For 3098/3107 co-relation queries the response was YES. [2024-06-27 18:04:45,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2764 conditions, 746 events. 359/746 cut-off events. For 3098/3107 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3559 event pairs, 161 based on Foata normal form. 8/743 useless extension candidates. Maximal degree in co-relation 1961. Up to 566 conditions per place. [2024-06-27 18:04:45,661 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 50 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-27 18:04:45,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 653 flow [2024-06-27 18:04:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:45,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 18:04:45,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 18:04:45,663 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 450 flow. Second operand 6 states and 126 transitions. [2024-06-27 18:04:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 653 flow [2024-06-27 18:04:45,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 637 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 18:04:45,668 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 497 flow [2024-06-27 18:04:45,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2024-06-27 18:04:45,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 18:04:45,669 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 497 flow [2024-06-27 18:04:45,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:45,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:45,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:04:45,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:45,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 419884800, now seen corresponding path program 1 times [2024-06-27 18:04:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784853628] [2024-06-27 18:04:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784853628] [2024-06-27 18:04:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784853628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:45,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:45,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413368285] [2024-06-27 18:04:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:45,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:45,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 497 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:45,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,032 INFO L124 PetriNetUnfolderBase]: 484/937 cut-off events. [2024-06-27 18:04:46,032 INFO L125 PetriNetUnfolderBase]: For 4565/4574 co-relation queries the response was YES. [2024-06-27 18:04:46,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 937 events. 484/937 cut-off events. For 4565/4574 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4547 event pairs, 140 based on Foata normal form. 12/939 useless extension candidates. Maximal degree in co-relation 2658. Up to 612 conditions per place. [2024-06-27 18:04:46,039 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 79 selfloop transitions, 27 changer transitions 0/117 dead transitions. [2024-06-27 18:04:46,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 117 transitions, 932 flow [2024-06-27 18:04:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 18:04:46,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 18:04:46,041 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 497 flow. Second operand 9 states and 189 transitions. [2024-06-27 18:04:46,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 117 transitions, 932 flow [2024-06-27 18:04:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 117 transitions, 902 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:46,048 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 644 flow [2024-06-27 18:04:46,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=644, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2024-06-27 18:04:46,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 18:04:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 644 flow [2024-06-27 18:04:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:46,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:04:46,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1702407394, now seen corresponding path program 2 times [2024-06-27 18:04:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598867343] [2024-06-27 18:04:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:46,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598867343] [2024-06-27 18:04:46,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598867343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:46,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580582008] [2024-06-27 18:04:46,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:46,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:46,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:46,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:46,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:46,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,428 INFO L124 PetriNetUnfolderBase]: 523/1010 cut-off events. [2024-06-27 18:04:46,428 INFO L125 PetriNetUnfolderBase]: For 6314/6323 co-relation queries the response was YES. [2024-06-27 18:04:46,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4175 conditions, 1010 events. 523/1010 cut-off events. For 6314/6323 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5006 event pairs, 153 based on Foata normal form. 12/1012 useless extension candidates. Maximal degree in co-relation 3242. Up to 602 conditions per place. [2024-06-27 18:04:46,436 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 83 selfloop transitions, 34 changer transitions 0/128 dead transitions. [2024-06-27 18:04:46,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 128 transitions, 1104 flow [2024-06-27 18:04:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:04:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:04:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 18:04:46,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244755244755245 [2024-06-27 18:04:46,438 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 644 flow. Second operand 11 states and 225 transitions. [2024-06-27 18:04:46,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 128 transitions, 1104 flow [2024-06-27 18:04:46,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1055 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 18:04:46,447 INFO L231 Difference]: Finished difference. Result has 105 places, 90 transitions, 726 flow [2024-06-27 18:04:46,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=726, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2024-06-27 18:04:46,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-27 18:04:46,448 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 726 flow [2024-06-27 18:04:46,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:46,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:46,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:04:46,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 433765980, now seen corresponding path program 3 times [2024-06-27 18:04:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973289326] [2024-06-27 18:04:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:46,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973289326] [2024-06-27 18:04:46,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973289326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:46,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738984649] [2024-06-27 18:04:46,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:46,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:46,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:46,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:46,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:46,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:46,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:46,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:46,812 INFO L124 PetriNetUnfolderBase]: 558/1077 cut-off events. [2024-06-27 18:04:46,812 INFO L125 PetriNetUnfolderBase]: For 7961/7970 co-relation queries the response was YES. [2024-06-27 18:04:46,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4586 conditions, 1077 events. 558/1077 cut-off events. For 7961/7970 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5453 event pairs, 148 based on Foata normal form. 12/1079 useless extension candidates. Maximal degree in co-relation 3911. Up to 539 conditions per place. [2024-06-27 18:04:46,821 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 73 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-27 18:04:46,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1158 flow [2024-06-27 18:04:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:04:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:04:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 18:04:46,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2024-06-27 18:04:46,823 INFO L175 Difference]: Start difference. First operand has 105 places, 90 transitions, 726 flow. Second operand 10 states and 200 transitions. [2024-06-27 18:04:46,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1158 flow [2024-06-27 18:04:46,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 126 transitions, 1105 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:46,833 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 822 flow [2024-06-27 18:04:46,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=822, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2024-06-27 18:04:46,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 18:04:46,834 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 822 flow [2024-06-27 18:04:46,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:46,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:46,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:04:46,835 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:46,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1425684885, now seen corresponding path program 1 times [2024-06-27 18:04:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364639698] [2024-06-27 18:04:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:46,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:46,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364639698] [2024-06-27 18:04:46,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364639698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:46,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:46,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:46,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233734513] [2024-06-27 18:04:46,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:47,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:47,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,254 INFO L124 PetriNetUnfolderBase]: 584/1146 cut-off events. [2024-06-27 18:04:47,254 INFO L125 PetriNetUnfolderBase]: For 10128/10155 co-relation queries the response was YES. [2024-06-27 18:04:47,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5045 conditions, 1146 events. 584/1146 cut-off events. For 10128/10155 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6132 event pairs, 179 based on Foata normal form. 14/1152 useless extension candidates. Maximal degree in co-relation 4364. Up to 848 conditions per place. [2024-06-27 18:04:47,263 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 95 selfloop transitions, 20 changer transitions 0/132 dead transitions. [2024-06-27 18:04:47,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 1225 flow [2024-06-27 18:04:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 18:04:47,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-27 18:04:47,265 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 822 flow. Second operand 8 states and 164 transitions. [2024-06-27 18:04:47,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 1225 flow [2024-06-27 18:04:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 132 transitions, 1171 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:47,276 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 924 flow [2024-06-27 18:04:47,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=924, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2024-06-27 18:04:47,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 18:04:47,277 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 924 flow [2024-06-27 18:04:47,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:47,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:04:47,278 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1552975603, now seen corresponding path program 2 times [2024-06-27 18:04:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763278579] [2024-06-27 18:04:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763278579] [2024-06-27 18:04:47,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763278579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:47,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:47,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042224022] [2024-06-27 18:04:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:47,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:47,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:47,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:47,704 INFO L124 PetriNetUnfolderBase]: 618/1204 cut-off events. [2024-06-27 18:04:47,704 INFO L125 PetriNetUnfolderBase]: For 11391/11400 co-relation queries the response was YES. [2024-06-27 18:04:47,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1204 events. 618/1204 cut-off events. For 11391/11400 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6491 event pairs, 197 based on Foata normal form. 14/1210 useless extension candidates. Maximal degree in co-relation 4848. Up to 839 conditions per place. [2024-06-27 18:04:47,746 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 103 selfloop transitions, 26 changer transitions 0/146 dead transitions. [2024-06-27 18:04:47,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 146 transitions, 1376 flow [2024-06-27 18:04:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 18:04:47,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5242165242165242 [2024-06-27 18:04:47,748 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 924 flow. Second operand 9 states and 184 transitions. [2024-06-27 18:04:47,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 146 transitions, 1376 flow [2024-06-27 18:04:47,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 146 transitions, 1320 flow, removed 28 selfloop flow, removed 0 redundant places. [2024-06-27 18:04:47,761 INFO L231 Difference]: Finished difference. Result has 129 places, 116 transitions, 1060 flow [2024-06-27 18:04:47,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1060, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2024-06-27 18:04:47,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 18:04:47,762 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 1060 flow [2024-06-27 18:04:47,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:47,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:47,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:04:47,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:47,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:47,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1234768981, now seen corresponding path program 3 times [2024-06-27 18:04:47,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:47,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337599811] [2024-06-27 18:04:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:47,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:47,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337599811] [2024-06-27 18:04:47,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337599811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:47,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:47,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105788776] [2024-06-27 18:04:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:47,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:47,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 116 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:47,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:47,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:47,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,164 INFO L124 PetriNetUnfolderBase]: 606/1184 cut-off events. [2024-06-27 18:04:48,165 INFO L125 PetriNetUnfolderBase]: For 11989/11995 co-relation queries the response was YES. [2024-06-27 18:04:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 1184 events. 606/1184 cut-off events. For 11989/11995 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6341 event pairs, 198 based on Foata normal form. 12/1188 useless extension candidates. Maximal degree in co-relation 4986. Up to 871 conditions per place. [2024-06-27 18:04:48,178 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 106 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-06-27 18:04:48,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 145 transitions, 1411 flow [2024-06-27 18:04:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 18:04:48,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-27 18:04:48,181 INFO L175 Difference]: Start difference. First operand has 129 places, 116 transitions, 1060 flow. Second operand 8 states and 168 transitions. [2024-06-27 18:04:48,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 145 transitions, 1411 flow [2024-06-27 18:04:48,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 145 transitions, 1362 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:48,201 INFO L231 Difference]: Finished difference. Result has 135 places, 118 transitions, 1084 flow [2024-06-27 18:04:48,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2024-06-27 18:04:48,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 18:04:48,202 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 1084 flow [2024-06-27 18:04:48,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:48,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:48,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:04:48,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash -822029264, now seen corresponding path program 1 times [2024-06-27 18:04:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036418072] [2024-06-27 18:04:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036418072] [2024-06-27 18:04:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036418072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:48,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392429249] [2024-06-27 18:04:48,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:04:48,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:48,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:04:48,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:48,515 INFO L124 PetriNetUnfolderBase]: 483/1129 cut-off events. [2024-06-27 18:04:48,516 INFO L125 PetriNetUnfolderBase]: For 8587/8647 co-relation queries the response was YES. [2024-06-27 18:04:48,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4687 conditions, 1129 events. 483/1129 cut-off events. For 8587/8647 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7162 event pairs, 111 based on Foata normal form. 16/1116 useless extension candidates. Maximal degree in co-relation 4270. Up to 251 conditions per place. [2024-06-27 18:04:48,526 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 67 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2024-06-27 18:04:48,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 156 transitions, 1407 flow [2024-06-27 18:04:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 18:04:48,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6495726495726496 [2024-06-27 18:04:48,528 INFO L175 Difference]: Start difference. First operand has 135 places, 118 transitions, 1084 flow. Second operand 9 states and 228 transitions. [2024-06-27 18:04:48,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 156 transitions, 1407 flow [2024-06-27 18:04:48,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 156 transitions, 1340 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:48,545 INFO L231 Difference]: Finished difference. Result has 141 places, 117 transitions, 1148 flow [2024-06-27 18:04:48,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1148, PETRI_PLACES=141, PETRI_TRANSITIONS=117} [2024-06-27 18:04:48,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 18:04:48,546 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 117 transitions, 1148 flow [2024-06-27 18:04:48,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:48,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:48,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:48,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:04:48,546 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:48,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1390836685, now seen corresponding path program 1 times [2024-06-27 18:04:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:48,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156306653] [2024-06-27 18:04:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:48,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:48,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156306653] [2024-06-27 18:04:48,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156306653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:48,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:48,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:48,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282185881] [2024-06-27 18:04:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:48,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:48,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2024-06-27 18:04:48,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 117 transitions, 1148 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:48,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:48,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2024-06-27 18:04:48,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,101 INFO L124 PetriNetUnfolderBase]: 1245/2347 cut-off events. [2024-06-27 18:04:49,101 INFO L125 PetriNetUnfolderBase]: For 21023/21063 co-relation queries the response was YES. [2024-06-27 18:04:49,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 2347 events. 1245/2347 cut-off events. For 21023/21063 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14158 event pairs, 384 based on Foata normal form. 6/2339 useless extension candidates. Maximal degree in co-relation 8516. Up to 1842 conditions per place. [2024-06-27 18:04:49,117 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 136 selfloop transitions, 29 changer transitions 0/180 dead transitions. [2024-06-27 18:04:49,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 180 transitions, 1970 flow [2024-06-27 18:04:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 18:04:49,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-27 18:04:49,119 INFO L175 Difference]: Start difference. First operand has 141 places, 117 transitions, 1148 flow. Second operand 9 states and 182 transitions. [2024-06-27 18:04:49,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 180 transitions, 1970 flow [2024-06-27 18:04:49,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 180 transitions, 1957 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:49,149 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1491 flow [2024-06-27 18:04:49,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1491, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2024-06-27 18:04:49,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 18:04:49,150 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1491 flow [2024-06-27 18:04:49,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:49,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:04:49,152 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 47085603, now seen corresponding path program 2 times [2024-06-27 18:04:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856796808] [2024-06-27 18:04:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856796808] [2024-06-27 18:04:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856796808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:49,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:49,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551143098] [2024-06-27 18:04:49,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:49,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:49,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:49,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1491 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:49,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:49,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:49,591 INFO L124 PetriNetUnfolderBase]: 957/1905 cut-off events. [2024-06-27 18:04:49,591 INFO L125 PetriNetUnfolderBase]: For 23880/23923 co-relation queries the response was YES. [2024-06-27 18:04:49,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9597 conditions, 1905 events. 957/1905 cut-off events. For 23880/23923 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11725 event pairs, 319 based on Foata normal form. 6/1896 useless extension candidates. Maximal degree in co-relation 8217. Up to 1205 conditions per place. [2024-06-27 18:04:49,604 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 117 selfloop transitions, 36 changer transitions 0/171 dead transitions. [2024-06-27 18:04:49,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 2058 flow [2024-06-27 18:04:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:04:49,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-27 18:04:49,605 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1491 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:04:49,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 2058 flow [2024-06-27 18:04:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 171 transitions, 2016 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 18:04:49,638 INFO L231 Difference]: Finished difference. Result has 160 places, 143 transitions, 1655 flow [2024-06-27 18:04:49,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1655, PETRI_PLACES=160, PETRI_TRANSITIONS=143} [2024-06-27 18:04:49,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 18:04:49,639 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 143 transitions, 1655 flow [2024-06-27 18:04:49,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:49,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:49,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:49,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:04:49,640 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:49,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash 338171731, now seen corresponding path program 3 times [2024-06-27 18:04:49,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:49,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10927078] [2024-06-27 18:04:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:49,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10927078] [2024-06-27 18:04:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10927078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:49,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:49,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494565172] [2024-06-27 18:04:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:49,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:49,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 143 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:49,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:49,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:49,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,073 INFO L124 PetriNetUnfolderBase]: 936/1860 cut-off events. [2024-06-27 18:04:50,073 INFO L125 PetriNetUnfolderBase]: For 26257/26304 co-relation queries the response was YES. [2024-06-27 18:04:50,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9617 conditions, 1860 events. 936/1860 cut-off events. For 26257/26304 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11343 event pairs, 343 based on Foata normal form. 15/1854 useless extension candidates. Maximal degree in co-relation 8217. Up to 1181 conditions per place. [2024-06-27 18:04:50,085 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 124 selfloop transitions, 37 changer transitions 0/179 dead transitions. [2024-06-27 18:04:50,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 179 transitions, 2190 flow [2024-06-27 18:04:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 18:04:50,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-27 18:04:50,087 INFO L175 Difference]: Start difference. First operand has 160 places, 143 transitions, 1655 flow. Second operand 8 states and 170 transitions. [2024-06-27 18:04:50,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 179 transitions, 2190 flow [2024-06-27 18:04:50,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 179 transitions, 2126 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-27 18:04:50,124 INFO L231 Difference]: Finished difference. Result has 169 places, 149 transitions, 1769 flow [2024-06-27 18:04:50,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1769, PETRI_PLACES=169, PETRI_TRANSITIONS=149} [2024-06-27 18:04:50,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 18:04:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 149 transitions, 1769 flow [2024-06-27 18:04:50,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:50,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:04:50,125 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,126 INFO L85 PathProgramCache]: Analyzing trace with hash -864699876, now seen corresponding path program 2 times [2024-06-27 18:04:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721947647] [2024-06-27 18:04:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721947647] [2024-06-27 18:04:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721947647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:50,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393306254] [2024-06-27 18:04:50,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:04:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:04:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:04:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:50,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 149 transitions, 1769 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:50,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:50,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:50,591 INFO L124 PetriNetUnfolderBase]: 912/1837 cut-off events. [2024-06-27 18:04:50,591 INFO L125 PetriNetUnfolderBase]: For 23840/23852 co-relation queries the response was YES. [2024-06-27 18:04:50,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9404 conditions, 1837 events. 912/1837 cut-off events. For 23840/23852 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11344 event pairs, 258 based on Foata normal form. 7/1823 useless extension candidates. Maximal degree in co-relation 8475. Up to 981 conditions per place. [2024-06-27 18:04:50,654 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 107 selfloop transitions, 57 changer transitions 0/183 dead transitions. [2024-06-27 18:04:50,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2305 flow [2024-06-27 18:04:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 18:04:50,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-27 18:04:50,655 INFO L175 Difference]: Start difference. First operand has 169 places, 149 transitions, 1769 flow. Second operand 9 states and 183 transitions. [2024-06-27 18:04:50,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2305 flow [2024-06-27 18:04:50,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 183 transitions, 2186 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 18:04:50,689 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1830 flow [2024-06-27 18:04:50,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2024-06-27 18:04:50,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 18:04:50,690 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1830 flow [2024-06-27 18:04:50,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:50,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:50,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:50,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:04:50,691 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:50,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2004783102, now seen corresponding path program 1 times [2024-06-27 18:04:50,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:50,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173692008] [2024-06-27 18:04:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173692008] [2024-06-27 18:04:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173692008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:50,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:50,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:50,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746092482] [2024-06-27 18:04:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:50,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:50,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:50,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:50,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1830 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:50,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:50,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:50,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:51,217 INFO L124 PetriNetUnfolderBase]: 918/1847 cut-off events. [2024-06-27 18:04:51,217 INFO L125 PetriNetUnfolderBase]: For 26199/26204 co-relation queries the response was YES. [2024-06-27 18:04:51,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9695 conditions, 1847 events. 918/1847 cut-off events. For 26199/26204 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11349 event pairs, 368 based on Foata normal form. 4/1840 useless extension candidates. Maximal degree in co-relation 8763. Up to 1586 conditions per place. [2024-06-27 18:04:51,233 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 117 selfloop transitions, 25 changer transitions 0/165 dead transitions. [2024-06-27 18:04:51,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 165 transitions, 2153 flow [2024-06-27 18:04:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 18:04:51,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-27 18:04:51,234 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1830 flow. Second operand 8 states and 151 transitions. [2024-06-27 18:04:51,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 165 transitions, 2153 flow [2024-06-27 18:04:51,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 165 transitions, 2048 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:04:51,274 INFO L231 Difference]: Finished difference. Result has 176 places, 152 transitions, 1779 flow [2024-06-27 18:04:51,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1779, PETRI_PLACES=176, PETRI_TRANSITIONS=152} [2024-06-27 18:04:51,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 18:04:51,275 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 152 transitions, 1779 flow [2024-06-27 18:04:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:51,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:51,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:04:51,275 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1926852838, now seen corresponding path program 2 times [2024-06-27 18:04:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579875203] [2024-06-27 18:04:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:51,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:51,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579875203] [2024-06-27 18:04:51,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579875203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:51,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:51,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:51,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375215119] [2024-06-27 18:04:51,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:51,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:51,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:51,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 152 transitions, 1779 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:51,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:51,748 INFO L124 PetriNetUnfolderBase]: 925/1867 cut-off events. [2024-06-27 18:04:51,748 INFO L125 PetriNetUnfolderBase]: For 25972/25977 co-relation queries the response was YES. [2024-06-27 18:04:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 1867 events. 925/1867 cut-off events. For 25972/25977 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11576 event pairs, 354 based on Foata normal form. 4/1860 useless extension candidates. Maximal degree in co-relation 8680. Up to 1561 conditions per place. [2024-06-27 18:04:51,763 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 113 selfloop transitions, 33 changer transitions 0/169 dead transitions. [2024-06-27 18:04:51,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 169 transitions, 2172 flow [2024-06-27 18:04:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:04:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:04:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 18:04:51,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-27 18:04:51,764 INFO L175 Difference]: Start difference. First operand has 176 places, 152 transitions, 1779 flow. Second operand 8 states and 150 transitions. [2024-06-27 18:04:51,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 169 transitions, 2172 flow [2024-06-27 18:04:51,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 169 transitions, 2086 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:51,799 INFO L231 Difference]: Finished difference. Result has 175 places, 155 transitions, 1789 flow [2024-06-27 18:04:51,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1789, PETRI_PLACES=175, PETRI_TRANSITIONS=155} [2024-06-27 18:04:51,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 18:04:51,800 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 155 transitions, 1789 flow [2024-06-27 18:04:51,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:51,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:51,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:04:51,801 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:51,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:51,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1825130238, now seen corresponding path program 3 times [2024-06-27 18:04:51,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:51,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563558624] [2024-06-27 18:04:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563558624] [2024-06-27 18:04:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563558624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:51,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:51,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:51,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383578867] [2024-06-27 18:04:51,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:51,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:51,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:51,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:51,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 39 [2024-06-27 18:04:51,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 155 transitions, 1789 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:51,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:51,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 39 [2024-06-27 18:04:51,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:52,248 INFO L124 PetriNetUnfolderBase]: 922/1860 cut-off events. [2024-06-27 18:04:52,248 INFO L125 PetriNetUnfolderBase]: For 26964/26969 co-relation queries the response was YES. [2024-06-27 18:04:52,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9589 conditions, 1860 events. 922/1860 cut-off events. For 26964/26969 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11482 event pairs, 358 based on Foata normal form. 4/1853 useless extension candidates. Maximal degree in co-relation 8655. Up to 1559 conditions per place. [2024-06-27 18:04:52,264 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 115 selfloop transitions, 32 changer transitions 0/170 dead transitions. [2024-06-27 18:04:52,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 170 transitions, 2122 flow [2024-06-27 18:04:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 18:04:52,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-06-27 18:04:52,273 INFO L175 Difference]: Start difference. First operand has 175 places, 155 transitions, 1789 flow. Second operand 9 states and 165 transitions. [2024-06-27 18:04:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 170 transitions, 2122 flow [2024-06-27 18:04:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 170 transitions, 2068 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:04:52,308 INFO L231 Difference]: Finished difference. Result has 181 places, 155 transitions, 1803 flow [2024-06-27 18:04:52,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1803, PETRI_PLACES=181, PETRI_TRANSITIONS=155} [2024-06-27 18:04:52,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 18:04:52,309 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 155 transitions, 1803 flow [2024-06-27 18:04:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:52,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:52,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:04:52,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:52,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1986074079, now seen corresponding path program 1 times [2024-06-27 18:04:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742309649] [2024-06-27 18:04:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:52,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742309649] [2024-06-27 18:04:52,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742309649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:52,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:52,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750719796] [2024-06-27 18:04:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:52,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:52,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 155 transitions, 1803 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:52,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:52,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:52,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:52,872 INFO L124 PetriNetUnfolderBase]: 982/1919 cut-off events. [2024-06-27 18:04:52,872 INFO L125 PetriNetUnfolderBase]: For 27651/27654 co-relation queries the response was YES. [2024-06-27 18:04:52,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9839 conditions, 1919 events. 982/1919 cut-off events. For 27651/27654 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11526 event pairs, 327 based on Foata normal form. 6/1914 useless extension candidates. Maximal degree in co-relation 8830. Up to 1371 conditions per place. [2024-06-27 18:04:52,889 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 42 changer transitions 0/191 dead transitions. [2024-06-27 18:04:52,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 191 transitions, 2298 flow [2024-06-27 18:04:52,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:04:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:04:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 18:04:52,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 18:04:52,891 INFO L175 Difference]: Start difference. First operand has 181 places, 155 transitions, 1803 flow. Second operand 11 states and 208 transitions. [2024-06-27 18:04:52,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 191 transitions, 2298 flow [2024-06-27 18:04:52,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 191 transitions, 2190 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:52,933 INFO L231 Difference]: Finished difference. Result has 183 places, 156 transitions, 1792 flow [2024-06-27 18:04:52,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1792, PETRI_PLACES=183, PETRI_TRANSITIONS=156} [2024-06-27 18:04:52,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 18:04:52,934 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 156 transitions, 1792 flow [2024-06-27 18:04:52,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:52,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:52,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:52,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:04:52,934 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:52,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:52,935 INFO L85 PathProgramCache]: Analyzing trace with hash 369541885, now seen corresponding path program 2 times [2024-06-27 18:04:52,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:52,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360408190] [2024-06-27 18:04:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:52,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:53,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:53,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360408190] [2024-06-27 18:04:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360408190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:53,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596697745] [2024-06-27 18:04:53,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:53,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:53,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 156 transitions, 1792 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:53,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:53,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:53,574 INFO L124 PetriNetUnfolderBase]: 1024/2001 cut-off events. [2024-06-27 18:04:53,575 INFO L125 PetriNetUnfolderBase]: For 31095/31098 co-relation queries the response was YES. [2024-06-27 18:04:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10347 conditions, 2001 events. 1024/2001 cut-off events. For 31095/31098 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12185 event pairs, 319 based on Foata normal form. 6/1996 useless extension candidates. Maximal degree in co-relation 9317. Up to 1316 conditions per place. [2024-06-27 18:04:53,591 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 148 selfloop transitions, 54 changer transitions 0/212 dead transitions. [2024-06-27 18:04:53,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 212 transitions, 2499 flow [2024-06-27 18:04:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:04:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:04:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 300 transitions. [2024-06-27 18:04:53,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45248868778280543 [2024-06-27 18:04:53,593 INFO L175 Difference]: Start difference. First operand has 183 places, 156 transitions, 1792 flow. Second operand 17 states and 300 transitions. [2024-06-27 18:04:53,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 212 transitions, 2499 flow [2024-06-27 18:04:53,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 212 transitions, 2388 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:53,646 INFO L231 Difference]: Finished difference. Result has 191 places, 160 transitions, 1838 flow [2024-06-27 18:04:53,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1838, PETRI_PLACES=191, PETRI_TRANSITIONS=160} [2024-06-27 18:04:53,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 18:04:53,649 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 160 transitions, 1838 flow [2024-06-27 18:04:53,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:53,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:53,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:53,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:04:53,650 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:53,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2020994091, now seen corresponding path program 3 times [2024-06-27 18:04:53,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:53,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940979508] [2024-06-27 18:04:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:53,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:53,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:53,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940979508] [2024-06-27 18:04:53,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940979508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:53,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:53,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235055637] [2024-06-27 18:04:53,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:53,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:53,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 160 transitions, 1838 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:53,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:53,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:53,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:54,284 INFO L124 PetriNetUnfolderBase]: 1015/1986 cut-off events. [2024-06-27 18:04:54,284 INFO L125 PetriNetUnfolderBase]: For 31251/31254 co-relation queries the response was YES. [2024-06-27 18:04:54,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 1986 events. 1015/1986 cut-off events. For 31251/31254 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12065 event pairs, 316 based on Foata normal form. 6/1981 useless extension candidates. Maximal degree in co-relation 9211. Up to 1314 conditions per place. [2024-06-27 18:04:54,296 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 148 selfloop transitions, 52 changer transitions 0/210 dead transitions. [2024-06-27 18:04:54,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 210 transitions, 2450 flow [2024-06-27 18:04:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:04:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:04:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 288 transitions. [2024-06-27 18:04:54,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 18:04:54,305 INFO L175 Difference]: Start difference. First operand has 191 places, 160 transitions, 1838 flow. Second operand 16 states and 288 transitions. [2024-06-27 18:04:54,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 210 transitions, 2450 flow [2024-06-27 18:04:54,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 210 transitions, 2325 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 18:04:54,345 INFO L231 Difference]: Finished difference. Result has 195 places, 160 transitions, 1821 flow [2024-06-27 18:04:54,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1821, PETRI_PLACES=195, PETRI_TRANSITIONS=160} [2024-06-27 18:04:54,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 18:04:54,346 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 160 transitions, 1821 flow [2024-06-27 18:04:54,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:54,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:54,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:04:54,347 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:54,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2020517001, now seen corresponding path program 4 times [2024-06-27 18:04:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789261201] [2024-06-27 18:04:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:54,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789261201] [2024-06-27 18:04:54,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789261201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276422080] [2024-06-27 18:04:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:54,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:54,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:54,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 160 transitions, 1821 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:54,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:54,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:54,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:54,958 INFO L124 PetriNetUnfolderBase]: 1006/1971 cut-off events. [2024-06-27 18:04:54,958 INFO L125 PetriNetUnfolderBase]: For 31388/31391 co-relation queries the response was YES. [2024-06-27 18:04:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10093 conditions, 1971 events. 1006/1971 cut-off events. For 31388/31391 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11984 event pairs, 312 based on Foata normal form. 6/1966 useless extension candidates. Maximal degree in co-relation 9038. Up to 1312 conditions per place. [2024-06-27 18:04:54,974 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 139 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-06-27 18:04:54,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 203 transitions, 2351 flow [2024-06-27 18:04:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:04:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:04:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 266 transitions. [2024-06-27 18:04:54,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547008547008547 [2024-06-27 18:04:54,975 INFO L175 Difference]: Start difference. First operand has 195 places, 160 transitions, 1821 flow. Second operand 15 states and 266 transitions. [2024-06-27 18:04:54,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 203 transitions, 2351 flow [2024-06-27 18:04:55,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 203 transitions, 2233 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-27 18:04:55,026 INFO L231 Difference]: Finished difference. Result has 195 places, 160 transitions, 1815 flow [2024-06-27 18:04:55,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1815, PETRI_PLACES=195, PETRI_TRANSITIONS=160} [2024-06-27 18:04:55,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 18:04:55,027 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 160 transitions, 1815 flow [2024-06-27 18:04:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:55,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:55,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:04:55,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:55,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 252996031, now seen corresponding path program 5 times [2024-06-27 18:04:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:55,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818857699] [2024-06-27 18:04:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:55,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818857699] [2024-06-27 18:04:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818857699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:55,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:55,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620256735] [2024-06-27 18:04:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:55,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:55,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:55,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:55,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 160 transitions, 1815 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:55,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:55,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:55,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:55,677 INFO L124 PetriNetUnfolderBase]: 1048/2054 cut-off events. [2024-06-27 18:04:55,677 INFO L125 PetriNetUnfolderBase]: For 35413/35416 co-relation queries the response was YES. [2024-06-27 18:04:55,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10575 conditions, 2054 events. 1048/2054 cut-off events. For 35413/35416 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12652 event pairs, 294 based on Foata normal form. 6/2049 useless extension candidates. Maximal degree in co-relation 9507. Up to 1147 conditions per place. [2024-06-27 18:04:55,695 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 124 selfloop transitions, 76 changer transitions 0/210 dead transitions. [2024-06-27 18:04:55,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 210 transitions, 2502 flow [2024-06-27 18:04:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:04:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:04:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 263 transitions. [2024-06-27 18:04:55,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495726495726496 [2024-06-27 18:04:55,696 INFO L175 Difference]: Start difference. First operand has 195 places, 160 transitions, 1815 flow. Second operand 15 states and 263 transitions. [2024-06-27 18:04:55,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 210 transitions, 2502 flow [2024-06-27 18:04:55,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 210 transitions, 2394 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 18:04:55,749 INFO L231 Difference]: Finished difference. Result has 196 places, 164 transitions, 1904 flow [2024-06-27 18:04:55,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1904, PETRI_PLACES=196, PETRI_TRANSITIONS=164} [2024-06-27 18:04:55,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 18:04:55,750 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 164 transitions, 1904 flow [2024-06-27 18:04:55,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:55,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:55,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:55,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:04:55,750 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:55,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:55,751 INFO L85 PathProgramCache]: Analyzing trace with hash 237802621, now seen corresponding path program 6 times [2024-06-27 18:04:55,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:55,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760138088] [2024-06-27 18:04:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:55,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:55,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:55,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760138088] [2024-06-27 18:04:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760138088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:55,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233767289] [2024-06-27 18:04:55,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:55,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:55,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 164 transitions, 1904 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:55,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:55,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:55,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:56,368 INFO L124 PetriNetUnfolderBase]: 1060/2076 cut-off events. [2024-06-27 18:04:56,368 INFO L125 PetriNetUnfolderBase]: For 37947/37950 co-relation queries the response was YES. [2024-06-27 18:04:56,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10833 conditions, 2076 events. 1060/2076 cut-off events. For 37947/37950 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12803 event pairs, 295 based on Foata normal form. 6/2071 useless extension candidates. Maximal degree in co-relation 9752. Up to 1151 conditions per place. [2024-06-27 18:04:56,385 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 134 selfloop transitions, 74 changer transitions 0/218 dead transitions. [2024-06-27 18:04:56,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 2662 flow [2024-06-27 18:04:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:04:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:04:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 297 transitions. [2024-06-27 18:04:56,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479638009049774 [2024-06-27 18:04:56,392 INFO L175 Difference]: Start difference. First operand has 196 places, 164 transitions, 1904 flow. Second operand 17 states and 297 transitions. [2024-06-27 18:04:56,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 2662 flow [2024-06-27 18:04:56,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 218 transitions, 2525 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 18:04:56,449 INFO L231 Difference]: Finished difference. Result has 204 places, 166 transitions, 1947 flow [2024-06-27 18:04:56,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1947, PETRI_PLACES=204, PETRI_TRANSITIONS=166} [2024-06-27 18:04:56,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 18:04:56,450 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 166 transitions, 1947 flow [2024-06-27 18:04:56,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:56,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:56,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:04:56,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:56,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash 397089311, now seen corresponding path program 7 times [2024-06-27 18:04:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:56,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563020703] [2024-06-27 18:04:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:56,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563020703] [2024-06-27 18:04:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563020703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:56,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:56,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:56,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058468650] [2024-06-27 18:04:56,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:56,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:56,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:56,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:56,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 166 transitions, 1947 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:56,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:56,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:57,019 INFO L124 PetriNetUnfolderBase]: 1051/2061 cut-off events. [2024-06-27 18:04:57,020 INFO L125 PetriNetUnfolderBase]: For 38104/38107 co-relation queries the response was YES. [2024-06-27 18:04:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10732 conditions, 2061 events. 1051/2061 cut-off events. For 38104/38107 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12730 event pairs, 298 based on Foata normal form. 6/2056 useless extension candidates. Maximal degree in co-relation 9638. Up to 1149 conditions per place. [2024-06-27 18:04:57,036 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 123 selfloop transitions, 78 changer transitions 0/211 dead transitions. [2024-06-27 18:04:57,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 211 transitions, 2547 flow [2024-06-27 18:04:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:04:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:04:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 262 transitions. [2024-06-27 18:04:57,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478632478632479 [2024-06-27 18:04:57,044 INFO L175 Difference]: Start difference. First operand has 204 places, 166 transitions, 1947 flow. Second operand 15 states and 262 transitions. [2024-06-27 18:04:57,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 211 transitions, 2547 flow [2024-06-27 18:04:57,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 211 transitions, 2381 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 18:04:57,099 INFO L231 Difference]: Finished difference. Result has 206 places, 166 transitions, 1941 flow [2024-06-27 18:04:57,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1941, PETRI_PLACES=206, PETRI_TRANSITIONS=166} [2024-06-27 18:04:57,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 18:04:57,100 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 166 transitions, 1941 flow [2024-06-27 18:04:57,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:57,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:57,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:04:57,100 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 968717531, now seen corresponding path program 8 times [2024-06-27 18:04:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109110462] [2024-06-27 18:04:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:57,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:57,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109110462] [2024-06-27 18:04:57,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109110462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:57,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:57,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:57,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57095917] [2024-06-27 18:04:57,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:57,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:57,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 166 transitions, 1941 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:57,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:57,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:57,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:57,576 INFO L124 PetriNetUnfolderBase]: 1058/2080 cut-off events. [2024-06-27 18:04:57,577 INFO L125 PetriNetUnfolderBase]: For 39191/39194 co-relation queries the response was YES. [2024-06-27 18:04:57,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10814 conditions, 2080 events. 1058/2080 cut-off events. For 39191/39194 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12896 event pairs, 285 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 9707. Up to 1153 conditions per place. [2024-06-27 18:04:57,593 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 122 selfloop transitions, 67 changer transitions 0/199 dead transitions. [2024-06-27 18:04:57,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 199 transitions, 2491 flow [2024-06-27 18:04:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:04:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:04:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 18:04:57,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794871794871795 [2024-06-27 18:04:57,597 INFO L175 Difference]: Start difference. First operand has 206 places, 166 transitions, 1941 flow. Second operand 10 states and 187 transitions. [2024-06-27 18:04:57,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 199 transitions, 2491 flow [2024-06-27 18:04:57,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 199 transitions, 2333 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 18:04:57,664 INFO L231 Difference]: Finished difference. Result has 202 places, 167 transitions, 1935 flow [2024-06-27 18:04:57,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1785, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1935, PETRI_PLACES=202, PETRI_TRANSITIONS=167} [2024-06-27 18:04:57,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 18:04:57,664 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 167 transitions, 1935 flow [2024-06-27 18:04:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:57,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:57,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:57,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:04:57,665 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:57,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash 744447675, now seen corresponding path program 9 times [2024-06-27 18:04:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:57,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613711176] [2024-06-27 18:04:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:57,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613711176] [2024-06-27 18:04:57,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613711176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817756580] [2024-06-27 18:04:57,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:57,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:57,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:57,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 167 transitions, 1935 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:57,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:57,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:57,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:58,266 INFO L124 PetriNetUnfolderBase]: 1079/2119 cut-off events. [2024-06-27 18:04:58,266 INFO L125 PetriNetUnfolderBase]: For 41527/41530 co-relation queries the response was YES. [2024-06-27 18:04:58,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10980 conditions, 2119 events. 1079/2119 cut-off events. For 41527/41530 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13215 event pairs, 294 based on Foata normal form. 6/2114 useless extension candidates. Maximal degree in co-relation 9860. Up to 1159 conditions per place. [2024-06-27 18:04:58,285 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 140 selfloop transitions, 78 changer transitions 0/228 dead transitions. [2024-06-27 18:04:58,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 228 transitions, 2694 flow [2024-06-27 18:04:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:04:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:04:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 328 transitions. [2024-06-27 18:04:58,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426450742240216 [2024-06-27 18:04:58,287 INFO L175 Difference]: Start difference. First operand has 202 places, 167 transitions, 1935 flow. Second operand 19 states and 328 transitions. [2024-06-27 18:04:58,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 228 transitions, 2694 flow [2024-06-27 18:04:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 228 transitions, 2575 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 18:04:58,362 INFO L231 Difference]: Finished difference. Result has 215 places, 170 transitions, 2005 flow [2024-06-27 18:04:58,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2005, PETRI_PLACES=215, PETRI_TRANSITIONS=170} [2024-06-27 18:04:58,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 18:04:58,362 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 170 transitions, 2005 flow [2024-06-27 18:04:58,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:58,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:58,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:58,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:04:58,363 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:58,363 INFO L85 PathProgramCache]: Analyzing trace with hash 743986395, now seen corresponding path program 10 times [2024-06-27 18:04:58,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:58,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444761692] [2024-06-27 18:04:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:58,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:58,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444761692] [2024-06-27 18:04:58,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444761692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:58,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:58,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:04:58,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794977882] [2024-06-27 18:04:58,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:58,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:04:58,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:58,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:04:58,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:04:58,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:58,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 170 transitions, 2005 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:58,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:58,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:58,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:58,968 INFO L124 PetriNetUnfolderBase]: 1070/2104 cut-off events. [2024-06-27 18:04:58,969 INFO L125 PetriNetUnfolderBase]: For 41506/41509 co-relation queries the response was YES. [2024-06-27 18:04:58,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10916 conditions, 2104 events. 1070/2104 cut-off events. For 41506/41509 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13109 event pairs, 291 based on Foata normal form. 6/2099 useless extension candidates. Maximal degree in co-relation 9783. Up to 1157 conditions per place. [2024-06-27 18:04:58,985 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 126 selfloop transitions, 77 changer transitions 0/213 dead transitions. [2024-06-27 18:04:58,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 213 transitions, 2607 flow [2024-06-27 18:04:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:04:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:04:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 251 transitions. [2024-06-27 18:04:58,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2024-06-27 18:04:58,986 INFO L175 Difference]: Start difference. First operand has 215 places, 170 transitions, 2005 flow. Second operand 14 states and 251 transitions. [2024-06-27 18:04:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 213 transitions, 2607 flow [2024-06-27 18:04:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 213 transitions, 2429 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-27 18:04:59,043 INFO L231 Difference]: Finished difference. Result has 212 places, 170 transitions, 1987 flow [2024-06-27 18:04:59,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1987, PETRI_PLACES=212, PETRI_TRANSITIONS=170} [2024-06-27 18:04:59,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 18:04:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 170 transitions, 1987 flow [2024-06-27 18:04:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:59,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:59,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:04:59,044 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:59,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1434445454, now seen corresponding path program 1 times [2024-06-27 18:04:59,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:59,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112314344] [2024-06-27 18:04:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:59,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:59,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112314344] [2024-06-27 18:04:59,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112314344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:59,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:59,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:04:59,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380290999] [2024-06-27 18:04:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:59,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:04:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:04:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:04:59,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:04:59,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 170 transitions, 1987 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:59,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:59,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:04:59,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:59,529 INFO L124 PetriNetUnfolderBase]: 1034/2044 cut-off events. [2024-06-27 18:04:59,529 INFO L125 PetriNetUnfolderBase]: For 38479/38482 co-relation queries the response was YES. [2024-06-27 18:04:59,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 2044 events. 1034/2044 cut-off events. For 38479/38482 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12677 event pairs, 307 based on Foata normal form. 24/2057 useless extension candidates. Maximal degree in co-relation 9281. Up to 1308 conditions per place. [2024-06-27 18:04:59,544 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 141 selfloop transitions, 49 changer transitions 0/200 dead transitions. [2024-06-27 18:04:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 2476 flow [2024-06-27 18:04:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:04:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:04:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 18:04:59,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928774928774929 [2024-06-27 18:04:59,545 INFO L175 Difference]: Start difference. First operand has 212 places, 170 transitions, 1987 flow. Second operand 9 states and 173 transitions. [2024-06-27 18:04:59,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 2476 flow [2024-06-27 18:04:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 200 transitions, 2304 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-27 18:04:59,597 INFO L231 Difference]: Finished difference. Result has 208 places, 170 transitions, 1922 flow [2024-06-27 18:04:59,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1922, PETRI_PLACES=208, PETRI_TRANSITIONS=170} [2024-06-27 18:04:59,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 18:04:59,598 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 170 transitions, 1922 flow [2024-06-27 18:04:59,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:04:59,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:04:59,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:04:59,598 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:04:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:04:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash -290588847, now seen corresponding path program 1 times [2024-06-27 18:04:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:04:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543067681] [2024-06-27 18:04:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:04:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:04:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:04:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:04:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:04:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543067681] [2024-06-27 18:04:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543067681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:04:59,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:04:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:04:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538146865] [2024-06-27 18:04:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:04:59,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:04:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:04:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:04:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:04:59,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:04:59,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 170 transitions, 1922 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:04:59,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:04:59,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:04:59,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:04:59,964 INFO L124 PetriNetUnfolderBase]: 732/1708 cut-off events. [2024-06-27 18:04:59,964 INFO L125 PetriNetUnfolderBase]: For 18482/18610 co-relation queries the response was YES. [2024-06-27 18:04:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7707 conditions, 1708 events. 732/1708 cut-off events. For 18482/18610 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11895 event pairs, 246 based on Foata normal form. 17/1669 useless extension candidates. Maximal degree in co-relation 7021. Up to 742 conditions per place. [2024-06-27 18:04:59,977 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 92 selfloop transitions, 28 changer transitions 0/198 dead transitions. [2024-06-27 18:04:59,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 198 transitions, 2258 flow [2024-06-27 18:04:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:04:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:04:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 18:04:59,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7008547008547008 [2024-06-27 18:04:59,978 INFO L175 Difference]: Start difference. First operand has 208 places, 170 transitions, 1922 flow. Second operand 6 states and 164 transitions. [2024-06-27 18:04:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 198 transitions, 2258 flow [2024-06-27 18:05:00,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 198 transitions, 2167 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:05:00,031 INFO L231 Difference]: Finished difference. Result has 211 places, 171 transitions, 1960 flow [2024-06-27 18:05:00,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1960, PETRI_PLACES=211, PETRI_TRANSITIONS=171} [2024-06-27 18:05:00,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 18:05:00,032 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 171 transitions, 1960 flow [2024-06-27 18:05:00,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:00,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:00,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:05:00,033 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:00,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash -831070201, now seen corresponding path program 2 times [2024-06-27 18:05:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:00,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934344591] [2024-06-27 18:05:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:00,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934344591] [2024-06-27 18:05:00,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934344591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:00,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:00,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:00,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55778330] [2024-06-27 18:05:00,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:00,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:00,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:00,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:05:00,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 171 transitions, 1960 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:00,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:05:00,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:00,394 INFO L124 PetriNetUnfolderBase]: 644/1549 cut-off events. [2024-06-27 18:05:00,394 INFO L125 PetriNetUnfolderBase]: For 16513/16516 co-relation queries the response was YES. [2024-06-27 18:05:00,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6948 conditions, 1549 events. 644/1549 cut-off events. For 16513/16516 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10710 event pairs, 213 based on Foata normal form. 20/1540 useless extension candidates. Maximal degree in co-relation 6412. Up to 738 conditions per place. [2024-06-27 18:05:00,403 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 91 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-27 18:05:00,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 186 transitions, 2110 flow [2024-06-27 18:05:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:05:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:05:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:05:00,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474358974358975 [2024-06-27 18:05:00,404 INFO L175 Difference]: Start difference. First operand has 211 places, 171 transitions, 1960 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:05:00,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 186 transitions, 2110 flow [2024-06-27 18:05:00,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 186 transitions, 1991 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:00,451 INFO L231 Difference]: Finished difference. Result has 210 places, 155 transitions, 1721 flow [2024-06-27 18:05:00,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1721, PETRI_PLACES=210, PETRI_TRANSITIONS=155} [2024-06-27 18:05:00,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 18:05:00,451 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 155 transitions, 1721 flow [2024-06-27 18:05:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:00,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:05:00,452 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:00,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:00,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1808306338, now seen corresponding path program 1 times [2024-06-27 18:05:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133559229] [2024-06-27 18:05:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133559229] [2024-06-27 18:05:00,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133559229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:00,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:00,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:00,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557238941] [2024-06-27 18:05:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:00,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 39 [2024-06-27 18:05:00,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 155 transitions, 1721 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:00,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 39 [2024-06-27 18:05:00,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:00,717 INFO L124 PetriNetUnfolderBase]: 575/1422 cut-off events. [2024-06-27 18:05:00,718 INFO L125 PetriNetUnfolderBase]: For 15219/15222 co-relation queries the response was YES. [2024-06-27 18:05:00,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6255 conditions, 1422 events. 575/1422 cut-off events. For 15219/15222 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9740 event pairs, 183 based on Foata normal form. 16/1414 useless extension candidates. Maximal degree in co-relation 5814. Up to 281 conditions per place. [2024-06-27 18:05:00,728 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 61 selfloop transitions, 55 changer transitions 0/170 dead transitions. [2024-06-27 18:05:00,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 170 transitions, 1938 flow [2024-06-27 18:05:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:05:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:05:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 18:05:00,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182336182336182 [2024-06-27 18:05:00,729 INFO L175 Difference]: Start difference. First operand has 210 places, 155 transitions, 1721 flow. Second operand 9 states and 217 transitions. [2024-06-27 18:05:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 170 transitions, 1938 flow [2024-06-27 18:05:00,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 170 transitions, 1832 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 18:05:00,768 INFO L231 Difference]: Finished difference. Result has 208 places, 141 transitions, 1627 flow [2024-06-27 18:05:00,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=208, PETRI_TRANSITIONS=141} [2024-06-27 18:05:00,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 18:05:00,769 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 141 transitions, 1627 flow [2024-06-27 18:05:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:00,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:00,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:05:00,770 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:00,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1395898795, now seen corresponding path program 1 times [2024-06-27 18:05:00,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:00,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751494449] [2024-06-27 18:05:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:00,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:00,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751494449] [2024-06-27 18:05:00,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751494449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:00,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:00,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203139044] [2024-06-27 18:05:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:00,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:00,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:00,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 141 transitions, 1627 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:00,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:00,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:01,296 INFO L124 PetriNetUnfolderBase]: 808/1746 cut-off events. [2024-06-27 18:05:01,296 INFO L125 PetriNetUnfolderBase]: For 29406/29409 co-relation queries the response was YES. [2024-06-27 18:05:01,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8206 conditions, 1746 events. 808/1746 cut-off events. For 29406/29409 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11192 event pairs, 271 based on Foata normal form. 4/1739 useless extension candidates. Maximal degree in co-relation 7442. Up to 1225 conditions per place. [2024-06-27 18:05:01,309 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 143 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-27 18:05:01,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 188 transitions, 2234 flow [2024-06-27 18:05:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-27 18:05:01,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635108481262327 [2024-06-27 18:05:01,310 INFO L175 Difference]: Start difference. First operand has 208 places, 141 transitions, 1627 flow. Second operand 13 states and 235 transitions. [2024-06-27 18:05:01,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 188 transitions, 2234 flow [2024-06-27 18:05:01,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 188 transitions, 2144 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:05:01,359 INFO L231 Difference]: Finished difference. Result has 216 places, 145 transitions, 1668 flow [2024-06-27 18:05:01,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1668, PETRI_PLACES=216, PETRI_TRANSITIONS=145} [2024-06-27 18:05:01,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 18:05:01,359 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 145 transitions, 1668 flow [2024-06-27 18:05:01,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:01,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:01,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:01,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:05:01,360 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:01,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:01,360 INFO L85 PathProgramCache]: Analyzing trace with hash -375049531, now seen corresponding path program 2 times [2024-06-27 18:05:01,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:01,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607956688] [2024-06-27 18:05:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:01,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:01,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607956688] [2024-06-27 18:05:01,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607956688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:01,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:01,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189661959] [2024-06-27 18:05:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:01,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:01,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:01,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 145 transitions, 1668 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:01,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:01,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:01,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:01,930 INFO L124 PetriNetUnfolderBase]: 887/1916 cut-off events. [2024-06-27 18:05:01,930 INFO L125 PetriNetUnfolderBase]: For 39010/39013 co-relation queries the response was YES. [2024-06-27 18:05:01,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9428 conditions, 1916 events. 887/1916 cut-off events. For 39010/39013 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12488 event pairs, 279 based on Foata normal form. 4/1909 useless extension candidates. Maximal degree in co-relation 8919. Up to 1136 conditions per place. [2024-06-27 18:05:01,945 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 163 selfloop transitions, 41 changer transitions 0/214 dead transitions. [2024-06-27 18:05:01,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 214 transitions, 2624 flow [2024-06-27 18:05:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 296 transitions. [2024-06-27 18:05:01,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 18:05:01,946 INFO L175 Difference]: Start difference. First operand has 216 places, 145 transitions, 1668 flow. Second operand 16 states and 296 transitions. [2024-06-27 18:05:01,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 214 transitions, 2624 flow [2024-06-27 18:05:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 214 transitions, 2546 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:05:02,011 INFO L231 Difference]: Finished difference. Result has 231 places, 152 transitions, 1793 flow [2024-06-27 18:05:02,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1793, PETRI_PLACES=231, PETRI_TRANSITIONS=152} [2024-06-27 18:05:02,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-27 18:05:02,012 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 152 transitions, 1793 flow [2024-06-27 18:05:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:02,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:02,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:02,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:05:02,012 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:02,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1144245683, now seen corresponding path program 3 times [2024-06-27 18:05:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235185443] [2024-06-27 18:05:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235185443] [2024-06-27 18:05:02,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235185443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:02,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:02,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:02,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106585141] [2024-06-27 18:05:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:02,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:02,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:02,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:02,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:02,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 152 transitions, 1793 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:02,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:02,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:02,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:02,574 INFO L124 PetriNetUnfolderBase]: 890/1932 cut-off events. [2024-06-27 18:05:02,574 INFO L125 PetriNetUnfolderBase]: For 41124/41127 co-relation queries the response was YES. [2024-06-27 18:05:02,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 1932 events. 890/1932 cut-off events. For 41124/41127 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12669 event pairs, 280 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 9125. Up to 1136 conditions per place. [2024-06-27 18:05:02,590 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 161 selfloop transitions, 41 changer transitions 0/212 dead transitions. [2024-06-27 18:05:02,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 212 transitions, 2606 flow [2024-06-27 18:05:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 279 transitions. [2024-06-27 18:05:02,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-06-27 18:05:02,591 INFO L175 Difference]: Start difference. First operand has 231 places, 152 transitions, 1793 flow. Second operand 15 states and 279 transitions. [2024-06-27 18:05:02,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 212 transitions, 2606 flow [2024-06-27 18:05:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 212 transitions, 2499 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 18:05:02,669 INFO L231 Difference]: Finished difference. Result has 242 places, 155 transitions, 1815 flow [2024-06-27 18:05:02,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1815, PETRI_PLACES=242, PETRI_TRANSITIONS=155} [2024-06-27 18:05:02,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 18:05:02,670 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 155 transitions, 1815 flow [2024-06-27 18:05:02,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:02,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:02,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:02,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:05:02,670 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:02,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash 972350439, now seen corresponding path program 4 times [2024-06-27 18:05:02,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:02,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956351449] [2024-06-27 18:05:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:02,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:02,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956351449] [2024-06-27 18:05:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956351449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:02,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:02,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:02,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122582794] [2024-06-27 18:05:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:02,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 155 transitions, 1815 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:02,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:02,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:02,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:03,216 INFO L124 PetriNetUnfolderBase]: 884/1922 cut-off events. [2024-06-27 18:05:03,217 INFO L125 PetriNetUnfolderBase]: For 40846/40849 co-relation queries the response was YES. [2024-06-27 18:05:03,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1922 events. 884/1922 cut-off events. For 40846/40849 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12594 event pairs, 288 based on Foata normal form. 4/1915 useless extension candidates. Maximal degree in co-relation 9011. Up to 1136 conditions per place. [2024-06-27 18:05:03,232 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 154 selfloop transitions, 40 changer transitions 0/204 dead transitions. [2024-06-27 18:05:03,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 204 transitions, 2497 flow [2024-06-27 18:05:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-27 18:05:03,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48520710059171596 [2024-06-27 18:05:03,233 INFO L175 Difference]: Start difference. First operand has 242 places, 155 transitions, 1815 flow. Second operand 13 states and 246 transitions. [2024-06-27 18:05:03,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 204 transitions, 2497 flow [2024-06-27 18:05:03,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 204 transitions, 2401 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:03,310 INFO L231 Difference]: Finished difference. Result has 247 places, 155 transitions, 1803 flow [2024-06-27 18:05:03,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1803, PETRI_PLACES=247, PETRI_TRANSITIONS=155} [2024-06-27 18:05:03,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 18:05:03,311 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 155 transitions, 1803 flow [2024-06-27 18:05:03,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:03,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:03,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:03,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:05:03,312 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:03,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash 757942733, now seen corresponding path program 5 times [2024-06-27 18:05:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:03,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942240362] [2024-06-27 18:05:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:03,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:03,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942240362] [2024-06-27 18:05:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942240362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:03,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:03,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:03,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764149883] [2024-06-27 18:05:03,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:03,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:03,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:03,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 155 transitions, 1803 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:03,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:03,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:03,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:03,761 INFO L124 PetriNetUnfolderBase]: 887/1940 cut-off events. [2024-06-27 18:05:03,761 INFO L125 PetriNetUnfolderBase]: For 43098/43101 co-relation queries the response was YES. [2024-06-27 18:05:03,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9566 conditions, 1940 events. 887/1940 cut-off events. For 43098/43101 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12768 event pairs, 214 based on Foata normal form. 4/1931 useless extension candidates. Maximal degree in co-relation 8871. Up to 535 conditions per place. [2024-06-27 18:05:03,777 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 145 selfloop transitions, 49 changer transitions 0/204 dead transitions. [2024-06-27 18:05:03,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 204 transitions, 2559 flow [2024-06-27 18:05:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:05:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:05:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-27 18:05:03,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49145299145299143 [2024-06-27 18:05:03,780 INFO L175 Difference]: Start difference. First operand has 247 places, 155 transitions, 1803 flow. Second operand 12 states and 230 transitions. [2024-06-27 18:05:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 204 transitions, 2559 flow [2024-06-27 18:05:03,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 204 transitions, 2471 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:03,876 INFO L231 Difference]: Finished difference. Result has 247 places, 156 transitions, 1845 flow [2024-06-27 18:05:03,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1845, PETRI_PLACES=247, PETRI_TRANSITIONS=156} [2024-06-27 18:05:03,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 18:05:03,877 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 156 transitions, 1845 flow [2024-06-27 18:05:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:03,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:03,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:03,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:05:03,877 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:03,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:03,878 INFO L85 PathProgramCache]: Analyzing trace with hash -738481, now seen corresponding path program 6 times [2024-06-27 18:05:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718840803] [2024-06-27 18:05:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:03,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718840803] [2024-06-27 18:05:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718840803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:04,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022767967] [2024-06-27 18:05:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:04,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:04,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:04,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 156 transitions, 1845 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:04,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:04,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:04,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:04,511 INFO L124 PetriNetUnfolderBase]: 957/2092 cut-off events. [2024-06-27 18:05:04,511 INFO L125 PetriNetUnfolderBase]: For 48261/48264 co-relation queries the response was YES. [2024-06-27 18:05:04,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10452 conditions, 2092 events. 957/2092 cut-off events. For 48261/48264 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14131 event pairs, 260 based on Foata normal form. 4/2083 useless extension candidates. Maximal degree in co-relation 9741. Up to 808 conditions per place. [2024-06-27 18:05:04,529 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 158 selfloop transitions, 64 changer transitions 0/232 dead transitions. [2024-06-27 18:05:04,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 232 transitions, 2987 flow [2024-06-27 18:05:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 311 transitions. [2024-06-27 18:05:04,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46907993966817496 [2024-06-27 18:05:04,531 INFO L175 Difference]: Start difference. First operand has 247 places, 156 transitions, 1845 flow. Second operand 17 states and 311 transitions. [2024-06-27 18:05:04,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 232 transitions, 2987 flow [2024-06-27 18:05:04,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 232 transitions, 2841 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:04,634 INFO L231 Difference]: Finished difference. Result has 258 places, 165 transitions, 1974 flow [2024-06-27 18:05:04,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1974, PETRI_PLACES=258, PETRI_TRANSITIONS=165} [2024-06-27 18:05:04,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 18:05:04,635 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 165 transitions, 1974 flow [2024-06-27 18:05:04,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:04,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:04,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:04,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:05:04,636 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:04,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash -704407979, now seen corresponding path program 7 times [2024-06-27 18:05:04,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:04,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950149847] [2024-06-27 18:05:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950149847] [2024-06-27 18:05:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950149847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:04,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:04,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572199186] [2024-06-27 18:05:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:04,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:04,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:04,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 165 transitions, 1974 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:04,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:04,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:04,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:05,273 INFO L124 PetriNetUnfolderBase]: 984/2153 cut-off events. [2024-06-27 18:05:05,273 INFO L125 PetriNetUnfolderBase]: For 54958/54961 co-relation queries the response was YES. [2024-06-27 18:05:05,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 2153 events. 984/2153 cut-off events. For 54958/54961 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14647 event pairs, 271 based on Foata normal form. 4/2144 useless extension candidates. Maximal degree in co-relation 10484. Up to 924 conditions per place. [2024-06-27 18:05:05,292 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 149 selfloop transitions, 72 changer transitions 0/231 dead transitions. [2024-06-27 18:05:05,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 231 transitions, 2975 flow [2024-06-27 18:05:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 293 transitions. [2024-06-27 18:05:05,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46955128205128205 [2024-06-27 18:05:05,293 INFO L175 Difference]: Start difference. First operand has 258 places, 165 transitions, 1974 flow. Second operand 16 states and 293 transitions. [2024-06-27 18:05:05,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 231 transitions, 2975 flow [2024-06-27 18:05:05,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 231 transitions, 2801 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:05,437 INFO L231 Difference]: Finished difference. Result has 266 places, 170 transitions, 2023 flow [2024-06-27 18:05:05,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2023, PETRI_PLACES=266, PETRI_TRANSITIONS=170} [2024-06-27 18:05:05,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 18:05:05,438 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 170 transitions, 2023 flow [2024-06-27 18:05:05,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:05,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:05,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:05:05,439 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:05,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash 194692241, now seen corresponding path program 8 times [2024-06-27 18:05:05,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222783107] [2024-06-27 18:05:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:05,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:05,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222783107] [2024-06-27 18:05:05,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222783107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:05,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:05,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:05,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43601831] [2024-06-27 18:05:05,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:05,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:05,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:05,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:05,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:05,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:05,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 170 transitions, 2023 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:05,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:05,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:05,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:06,057 INFO L124 PetriNetUnfolderBase]: 995/2181 cut-off events. [2024-06-27 18:05:06,058 INFO L125 PetriNetUnfolderBase]: For 58256/58259 co-relation queries the response was YES. [2024-06-27 18:05:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11053 conditions, 2181 events. 995/2181 cut-off events. For 58256/58259 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14843 event pairs, 286 based on Foata normal form. 4/2172 useless extension candidates. Maximal degree in co-relation 10503. Up to 808 conditions per place. [2024-06-27 18:05:06,076 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 164 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-06-27 18:05:06,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 236 transitions, 3015 flow [2024-06-27 18:05:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 288 transitions. [2024-06-27 18:05:06,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-27 18:05:06,078 INFO L175 Difference]: Start difference. First operand has 266 places, 170 transitions, 2023 flow. Second operand 15 states and 288 transitions. [2024-06-27 18:05:06,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 236 transitions, 3015 flow [2024-06-27 18:05:06,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 236 transitions, 2889 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:05:06,188 INFO L231 Difference]: Finished difference. Result has 275 places, 173 transitions, 2071 flow [2024-06-27 18:05:06,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2071, PETRI_PLACES=275, PETRI_TRANSITIONS=173} [2024-06-27 18:05:06,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 18:05:06,189 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 173 transitions, 2071 flow [2024-06-27 18:05:06,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:06,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:06,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:06,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:05:06,189 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:06,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash -876303223, now seen corresponding path program 9 times [2024-06-27 18:05:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:06,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108435228] [2024-06-27 18:05:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108435228] [2024-06-27 18:05:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108435228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:06,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:06,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836138672] [2024-06-27 18:05:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:06,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:06,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:06,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 173 transitions, 2071 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:06,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:06,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:06,827 INFO L124 PetriNetUnfolderBase]: 998/2200 cut-off events. [2024-06-27 18:05:06,828 INFO L125 PetriNetUnfolderBase]: For 61406/61409 co-relation queries the response was YES. [2024-06-27 18:05:06,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11142 conditions, 2200 events. 998/2200 cut-off events. For 61406/61409 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15068 event pairs, 281 based on Foata normal form. 4/2191 useless extension candidates. Maximal degree in co-relation 10590. Up to 975 conditions per place. [2024-06-27 18:05:06,850 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 147 selfloop transitions, 72 changer transitions 0/229 dead transitions. [2024-06-27 18:05:06,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 229 transitions, 2928 flow [2024-06-27 18:05:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 265 transitions. [2024-06-27 18:05:06,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48534798534798534 [2024-06-27 18:05:06,852 INFO L175 Difference]: Start difference. First operand has 275 places, 173 transitions, 2071 flow. Second operand 14 states and 265 transitions. [2024-06-27 18:05:06,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 229 transitions, 2928 flow [2024-06-27 18:05:07,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 229 transitions, 2803 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:07,030 INFO L231 Difference]: Finished difference. Result has 280 places, 173 transitions, 2094 flow [2024-06-27 18:05:07,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2094, PETRI_PLACES=280, PETRI_TRANSITIONS=173} [2024-06-27 18:05:07,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 18:05:07,031 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 173 transitions, 2094 flow [2024-06-27 18:05:07,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:07,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:07,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:07,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:05:07,032 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:07,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash 360331375, now seen corresponding path program 10 times [2024-06-27 18:05:07,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:07,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685546374] [2024-06-27 18:05:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:07,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685546374] [2024-06-27 18:05:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685546374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406684153] [2024-06-27 18:05:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:07,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:07,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 173 transitions, 2094 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:07,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:07,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:07,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:07,711 INFO L124 PetriNetUnfolderBase]: 992/2189 cut-off events. [2024-06-27 18:05:07,711 INFO L125 PetriNetUnfolderBase]: For 61296/61299 co-relation queries the response was YES. [2024-06-27 18:05:07,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11053 conditions, 2189 events. 992/2189 cut-off events. For 61296/61299 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14986 event pairs, 282 based on Foata normal form. 4/2180 useless extension candidates. Maximal degree in co-relation 10494. Up to 808 conditions per place. [2024-06-27 18:05:07,733 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 169 selfloop transitions, 63 changer transitions 0/242 dead transitions. [2024-06-27 18:05:07,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 242 transitions, 3026 flow [2024-06-27 18:05:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 319 transitions. [2024-06-27 18:05:07,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48114630467571645 [2024-06-27 18:05:07,734 INFO L175 Difference]: Start difference. First operand has 280 places, 173 transitions, 2094 flow. Second operand 17 states and 319 transitions. [2024-06-27 18:05:07,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 242 transitions, 3026 flow [2024-06-27 18:05:07,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 242 transitions, 2854 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 18:05:07,927 INFO L231 Difference]: Finished difference. Result has 285 places, 173 transitions, 2052 flow [2024-06-27 18:05:07,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2052, PETRI_PLACES=285, PETRI_TRANSITIONS=173} [2024-06-27 18:05:07,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 18:05:07,928 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 173 transitions, 2052 flow [2024-06-27 18:05:07,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:07,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:07,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:07,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:05:07,929 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:07,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:07,930 INFO L85 PathProgramCache]: Analyzing trace with hash 816298105, now seen corresponding path program 11 times [2024-06-27 18:05:07,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:07,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620088732] [2024-06-27 18:05:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620088732] [2024-06-27 18:05:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620088732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:08,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:08,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072153790] [2024-06-27 18:05:08,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:08,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:08,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:08,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:08,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 173 transitions, 2052 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:08,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:08,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:08,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:08,483 INFO L124 PetriNetUnfolderBase]: 986/2175 cut-off events. [2024-06-27 18:05:08,483 INFO L125 PetriNetUnfolderBase]: For 60837/60840 co-relation queries the response was YES. [2024-06-27 18:05:08,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10806 conditions, 2175 events. 986/2175 cut-off events. For 60837/60840 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14817 event pairs, 430 based on Foata normal form. 4/2168 useless extension candidates. Maximal degree in co-relation 9960. Up to 1500 conditions per place. [2024-06-27 18:05:08,502 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 159 selfloop transitions, 39 changer transitions 0/208 dead transitions. [2024-06-27 18:05:08,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 208 transitions, 2646 flow [2024-06-27 18:05:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 18:05:08,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4948717948717949 [2024-06-27 18:05:08,503 INFO L175 Difference]: Start difference. First operand has 285 places, 173 transitions, 2052 flow. Second operand 10 states and 193 transitions. [2024-06-27 18:05:08,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 208 transitions, 2646 flow [2024-06-27 18:05:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 208 transitions, 2502 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-27 18:05:08,644 INFO L231 Difference]: Finished difference. Result has 281 places, 173 transitions, 1992 flow [2024-06-27 18:05:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1992, PETRI_PLACES=281, PETRI_TRANSITIONS=173} [2024-06-27 18:05:08,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 18:05:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 173 transitions, 1992 flow [2024-06-27 18:05:08,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:08,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:08,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:05:08,645 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:08,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1844801825, now seen corresponding path program 1 times [2024-06-27 18:05:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:08,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320930004] [2024-06-27 18:05:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:08,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:08,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320930004] [2024-06-27 18:05:08,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320930004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:08,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:08,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143574346] [2024-06-27 18:05:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:08,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:08,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 173 transitions, 1992 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:08,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:08,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:08,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:09,279 INFO L124 PetriNetUnfolderBase]: 1003/2218 cut-off events. [2024-06-27 18:05:09,279 INFO L125 PetriNetUnfolderBase]: For 66711/66714 co-relation queries the response was YES. [2024-06-27 18:05:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 2218 events. 1003/2218 cut-off events. For 66711/66714 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15222 event pairs, 466 based on Foata normal form. 4/2211 useless extension candidates. Maximal degree in co-relation 10449. Up to 1684 conditions per place. [2024-06-27 18:05:09,295 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 169 selfloop transitions, 35 changer transitions 0/214 dead transitions. [2024-06-27 18:05:09,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 214 transitions, 2637 flow [2024-06-27 18:05:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-27 18:05:09,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 18:05:09,296 INFO L175 Difference]: Start difference. First operand has 281 places, 173 transitions, 1992 flow. Second operand 13 states and 234 transitions. [2024-06-27 18:05:09,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 214 transitions, 2637 flow [2024-06-27 18:05:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 214 transitions, 2495 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:09,461 INFO L231 Difference]: Finished difference. Result has 281 places, 174 transitions, 1939 flow [2024-06-27 18:05:09,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1939, PETRI_PLACES=281, PETRI_TRANSITIONS=174} [2024-06-27 18:05:09,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 18:05:09,462 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 174 transitions, 1939 flow [2024-06-27 18:05:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:09,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:09,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:05:09,462 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:09,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash 144372605, now seen corresponding path program 2 times [2024-06-27 18:05:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:09,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777929513] [2024-06-27 18:05:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:09,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777929513] [2024-06-27 18:05:09,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777929513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:09,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:09,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:09,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575131520] [2024-06-27 18:05:09,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:09,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:09,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:09,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:09,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:09,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:09,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 174 transitions, 1939 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:09,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:09,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:09,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:10,083 INFO L124 PetriNetUnfolderBase]: 1043/2312 cut-off events. [2024-06-27 18:05:10,083 INFO L125 PetriNetUnfolderBase]: For 73375/73378 co-relation queries the response was YES. [2024-06-27 18:05:10,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11548 conditions, 2312 events. 1043/2312 cut-off events. For 73375/73378 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15990 event pairs, 466 based on Foata normal form. 4/2305 useless extension candidates. Maximal degree in co-relation 11014. Up to 1577 conditions per place. [2024-06-27 18:05:10,103 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 178 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-27 18:05:10,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 231 transitions, 2843 flow [2024-06-27 18:05:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 300 transitions. [2024-06-27 18:05:10,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45248868778280543 [2024-06-27 18:05:10,104 INFO L175 Difference]: Start difference. First operand has 281 places, 174 transitions, 1939 flow. Second operand 17 states and 300 transitions. [2024-06-27 18:05:10,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 231 transitions, 2843 flow [2024-06-27 18:05:10,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 231 transitions, 2770 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-27 18:05:10,263 INFO L231 Difference]: Finished difference. Result has 289 places, 176 transitions, 1989 flow [2024-06-27 18:05:10,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1989, PETRI_PLACES=289, PETRI_TRANSITIONS=176} [2024-06-27 18:05:10,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 18:05:10,264 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 176 transitions, 1989 flow [2024-06-27 18:05:10,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:10,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:10,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:05:10,269 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -995925701, now seen corresponding path program 3 times [2024-06-27 18:05:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527985204] [2024-06-27 18:05:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:10,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527985204] [2024-06-27 18:05:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527985204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:10,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:10,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432224454] [2024-06-27 18:05:10,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:10,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:10,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:10,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:10,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:10,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 176 transitions, 1989 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:10,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:10,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:10,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:10,975 INFO L124 PetriNetUnfolderBase]: 1060/2354 cut-off events. [2024-06-27 18:05:10,976 INFO L125 PetriNetUnfolderBase]: For 80436/80439 co-relation queries the response was YES. [2024-06-27 18:05:10,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11997 conditions, 2354 events. 1060/2354 cut-off events. For 80436/80439 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16402 event pairs, 466 based on Foata normal form. 4/2347 useless extension candidates. Maximal degree in co-relation 11461. Up to 1577 conditions per place. [2024-06-27 18:05:10,998 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 185 selfloop transitions, 44 changer transitions 0/239 dead transitions. [2024-06-27 18:05:10,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 239 transitions, 2944 flow [2024-06-27 18:05:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:05:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:05:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 331 transitions. [2024-06-27 18:05:10,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446693657219973 [2024-06-27 18:05:10,999 INFO L175 Difference]: Start difference. First operand has 289 places, 176 transitions, 1989 flow. Second operand 19 states and 331 transitions. [2024-06-27 18:05:10,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 239 transitions, 2944 flow [2024-06-27 18:05:11,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 239 transitions, 2833 flow, removed 16 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:11,164 INFO L231 Difference]: Finished difference. Result has 297 places, 179 transitions, 2027 flow [2024-06-27 18:05:11,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2027, PETRI_PLACES=297, PETRI_TRANSITIONS=179} [2024-06-27 18:05:11,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 18:05:11,165 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 179 transitions, 2027 flow [2024-06-27 18:05:11,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:11,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:11,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:11,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:05:11,165 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:11,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1212464729, now seen corresponding path program 4 times [2024-06-27 18:05:11,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:11,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185855083] [2024-06-27 18:05:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:11,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185855083] [2024-06-27 18:05:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185855083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735639790] [2024-06-27 18:05:11,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:11,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:11,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 179 transitions, 2027 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:11,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:11,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:11,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:11,854 INFO L124 PetriNetUnfolderBase]: 1054/2344 cut-off events. [2024-06-27 18:05:11,854 INFO L125 PetriNetUnfolderBase]: For 80175/80178 co-relation queries the response was YES. [2024-06-27 18:05:11,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11844 conditions, 2344 events. 1054/2344 cut-off events. For 80175/80178 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16293 event pairs, 467 based on Foata normal form. 4/2337 useless extension candidates. Maximal degree in co-relation 11017. Up to 1577 conditions per place. [2024-06-27 18:05:11,873 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 185 selfloop transitions, 45 changer transitions 0/240 dead transitions. [2024-06-27 18:05:11,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 240 transitions, 2868 flow [2024-06-27 18:05:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:05:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:05:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 333 transitions. [2024-06-27 18:05:11,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4493927125506073 [2024-06-27 18:05:11,875 INFO L175 Difference]: Start difference. First operand has 297 places, 179 transitions, 2027 flow. Second operand 19 states and 333 transitions. [2024-06-27 18:05:11,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 240 transitions, 2868 flow [2024-06-27 18:05:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 240 transitions, 2765 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-27 18:05:12,058 INFO L231 Difference]: Finished difference. Result has 303 places, 181 transitions, 2047 flow [2024-06-27 18:05:12,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2047, PETRI_PLACES=303, PETRI_TRANSITIONS=181} [2024-06-27 18:05:12,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 18:05:12,059 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 181 transitions, 2047 flow [2024-06-27 18:05:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:05:12,060 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:12,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2084490727, now seen corresponding path program 5 times [2024-06-27 18:05:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:12,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885717165] [2024-06-27 18:05:12,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:12,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:12,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:12,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885717165] [2024-06-27 18:05:12,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885717165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:12,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:12,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:05:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328238651] [2024-06-27 18:05:12,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:12,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:05:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:12,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:05:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:05:12,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:12,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 181 transitions, 2047 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:12,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:12,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:12,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:12,638 INFO L124 PetriNetUnfolderBase]: 1048/2328 cut-off events. [2024-06-27 18:05:12,638 INFO L125 PetriNetUnfolderBase]: For 79602/79605 co-relation queries the response was YES. [2024-06-27 18:05:12,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 2328 events. 1048/2328 cut-off events. For 79602/79605 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16135 event pairs, 352 based on Foata normal form. 4/2321 useless extension candidates. Maximal degree in co-relation 11146. Up to 1082 conditions per place. [2024-06-27 18:05:12,661 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 163 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-27 18:05:12,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 228 transitions, 2911 flow [2024-06-27 18:05:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 18:05:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 18:05:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-27 18:05:12,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893162393162393 [2024-06-27 18:05:12,662 INFO L175 Difference]: Start difference. First operand has 303 places, 181 transitions, 2047 flow. Second operand 12 states and 229 transitions. [2024-06-27 18:05:12,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 228 transitions, 2911 flow [2024-06-27 18:05:12,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 228 transitions, 2814 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-27 18:05:12,888 INFO L231 Difference]: Finished difference. Result has 302 places, 182 transitions, 2098 flow [2024-06-27 18:05:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2098, PETRI_PLACES=302, PETRI_TRANSITIONS=182} [2024-06-27 18:05:12,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 18:05:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 182 transitions, 2098 flow [2024-06-27 18:05:12,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:12,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:12,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:05:12,890 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:12,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1146086887, now seen corresponding path program 6 times [2024-06-27 18:05:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709038239] [2024-06-27 18:05:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709038239] [2024-06-27 18:05:13,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709038239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:13,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:13,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852849828] [2024-06-27 18:05:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:13,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:13,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:13,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 182 transitions, 2098 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:13,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:13,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:13,544 INFO L124 PetriNetUnfolderBase]: 1065/2375 cut-off events. [2024-06-27 18:05:13,544 INFO L125 PetriNetUnfolderBase]: For 87912/87915 co-relation queries the response was YES. [2024-06-27 18:05:13,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12163 conditions, 2375 events. 1065/2375 cut-off events. For 87912/87915 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16570 event pairs, 425 based on Foata normal form. 4/2368 useless extension candidates. Maximal degree in co-relation 11385. Up to 1437 conditions per place. [2024-06-27 18:05:13,565 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 173 selfloop transitions, 56 changer transitions 0/239 dead transitions. [2024-06-27 18:05:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 239 transitions, 3116 flow [2024-06-27 18:05:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 301 transitions. [2024-06-27 18:05:13,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539969834087481 [2024-06-27 18:05:13,566 INFO L175 Difference]: Start difference. First operand has 302 places, 182 transitions, 2098 flow. Second operand 17 states and 301 transitions. [2024-06-27 18:05:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 239 transitions, 3116 flow [2024-06-27 18:05:13,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 239 transitions, 2993 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:13,823 INFO L231 Difference]: Finished difference. Result has 311 places, 184 transitions, 2136 flow [2024-06-27 18:05:13,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2136, PETRI_PLACES=311, PETRI_TRANSITIONS=184} [2024-06-27 18:05:13,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 18:05:13,824 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 184 transitions, 2136 flow [2024-06-27 18:05:13,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:13,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:13,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:13,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:05:13,824 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:13,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:13,825 INFO L85 PathProgramCache]: Analyzing trace with hash 40012571, now seen corresponding path program 7 times [2024-06-27 18:05:13,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:13,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713875301] [2024-06-27 18:05:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:13,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:13,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:13,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713875301] [2024-06-27 18:05:13,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713875301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:13,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:13,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998865387] [2024-06-27 18:05:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:13,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:13,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:14,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:14,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 184 transitions, 2136 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:14,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:14,539 INFO L124 PetriNetUnfolderBase]: 1089/2430 cut-off events. [2024-06-27 18:05:14,540 INFO L125 PetriNetUnfolderBase]: For 97380/97383 co-relation queries the response was YES. [2024-06-27 18:05:14,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12719 conditions, 2430 events. 1089/2430 cut-off events. For 97380/97383 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17046 event pairs, 429 based on Foata normal form. 4/2423 useless extension candidates. Maximal degree in co-relation 12169. Up to 1437 conditions per place. [2024-06-27 18:05:14,561 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 185 selfloop transitions, 58 changer transitions 0/253 dead transitions. [2024-06-27 18:05:14,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 253 transitions, 3231 flow [2024-06-27 18:05:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-27 18:05:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-27 18:05:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 364 transitions. [2024-06-27 18:05:14,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 18:05:14,562 INFO L175 Difference]: Start difference. First operand has 311 places, 184 transitions, 2136 flow. Second operand 21 states and 364 transitions. [2024-06-27 18:05:14,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 253 transitions, 3231 flow [2024-06-27 18:05:14,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 253 transitions, 3051 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:14,802 INFO L231 Difference]: Finished difference. Result has 316 places, 187 transitions, 2123 flow [2024-06-27 18:05:14,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1967, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2123, PETRI_PLACES=316, PETRI_TRANSITIONS=187} [2024-06-27 18:05:14,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 18:05:14,803 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 187 transitions, 2123 flow [2024-06-27 18:05:14,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:14,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:14,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:14,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:05:14,803 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:14,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:14,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2082293573, now seen corresponding path program 8 times [2024-06-27 18:05:14,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:14,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634095674] [2024-06-27 18:05:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:14,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:14,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:14,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634095674] [2024-06-27 18:05:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634095674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:14,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:14,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:14,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619837038] [2024-06-27 18:05:14,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:14,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:14,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:15,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:15,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 187 transitions, 2123 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:15,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:15,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:15,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:15,521 INFO L124 PetriNetUnfolderBase]: 1099/2459 cut-off events. [2024-06-27 18:05:15,521 INFO L125 PetriNetUnfolderBase]: For 102611/102614 co-relation queries the response was YES. [2024-06-27 18:05:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 2459 events. 1099/2459 cut-off events. For 102611/102614 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17314 event pairs, 435 based on Foata normal form. 4/2452 useless extension candidates. Maximal degree in co-relation 12060. Up to 1437 conditions per place. [2024-06-27 18:05:15,546 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 179 selfloop transitions, 58 changer transitions 0/247 dead transitions. [2024-06-27 18:05:15,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 247 transitions, 3073 flow [2024-06-27 18:05:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 18:05:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 18:05:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 332 transitions. [2024-06-27 18:05:15,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44804318488529016 [2024-06-27 18:05:15,547 INFO L175 Difference]: Start difference. First operand has 316 places, 187 transitions, 2123 flow. Second operand 19 states and 332 transitions. [2024-06-27 18:05:15,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 247 transitions, 3073 flow [2024-06-27 18:05:15,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 247 transitions, 2929 flow, removed 9 selfloop flow, removed 18 redundant places. [2024-06-27 18:05:15,858 INFO L231 Difference]: Finished difference. Result has 317 places, 188 transitions, 2119 flow [2024-06-27 18:05:15,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2119, PETRI_PLACES=317, PETRI_TRANSITIONS=188} [2024-06-27 18:05:15,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 18:05:15,858 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 188 transitions, 2119 flow [2024-06-27 18:05:15,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:15,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:15,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:15,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:05:15,859 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:15,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1596328833, now seen corresponding path program 9 times [2024-06-27 18:05:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:15,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451632685] [2024-06-27 18:05:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451632685] [2024-06-27 18:05:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451632685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:16,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:16,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:16,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771641989] [2024-06-27 18:05:16,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:16,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:16,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:16,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 188 transitions, 2119 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:16,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:16,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:16,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:16,578 INFO L124 PetriNetUnfolderBase]: 1116/2501 cut-off events. [2024-06-27 18:05:16,578 INFO L125 PetriNetUnfolderBase]: For 111515/111518 co-relation queries the response was YES. [2024-06-27 18:05:16,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13208 conditions, 2501 events. 1116/2501 cut-off events. For 111515/111518 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17715 event pairs, 436 based on Foata normal form. 4/2494 useless extension candidates. Maximal degree in co-relation 12679. Up to 1592 conditions per place. [2024-06-27 18:05:16,607 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 164 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-06-27 18:05:16,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 236 transitions, 2935 flow [2024-06-27 18:05:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 279 transitions. [2024-06-27 18:05:16,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2024-06-27 18:05:16,608 INFO L175 Difference]: Start difference. First operand has 317 places, 188 transitions, 2119 flow. Second operand 16 states and 279 transitions. [2024-06-27 18:05:16,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 236 transitions, 2935 flow [2024-06-27 18:05:16,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 236 transitions, 2813 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-27 18:05:16,901 INFO L231 Difference]: Finished difference. Result has 319 places, 190 transitions, 2161 flow [2024-06-27 18:05:16,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2161, PETRI_PLACES=319, PETRI_TRANSITIONS=190} [2024-06-27 18:05:16,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 18:05:16,902 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 190 transitions, 2161 flow [2024-06-27 18:05:16,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:16,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:16,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:16,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:05:16,902 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:16,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1987714301, now seen corresponding path program 10 times [2024-06-27 18:05:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417394806] [2024-06-27 18:05:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:16,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:17,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417394806] [2024-06-27 18:05:17,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417394806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:17,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:17,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:17,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144567239] [2024-06-27 18:05:17,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:17,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:17,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:17,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:17,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 190 transitions, 2161 flow. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:17,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:17,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:17,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:17,485 INFO L124 PetriNetUnfolderBase]: 1110/2491 cut-off events. [2024-06-27 18:05:17,485 INFO L125 PetriNetUnfolderBase]: For 111153/111156 co-relation queries the response was YES. [2024-06-27 18:05:17,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13080 conditions, 2491 events. 1110/2491 cut-off events. For 111153/111156 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17625 event pairs, 442 based on Foata normal form. 4/2484 useless extension candidates. Maximal degree in co-relation 12549. Up to 1585 conditions per place. [2024-06-27 18:05:17,509 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 163 selfloop transitions, 62 changer transitions 0/235 dead transitions. [2024-06-27 18:05:17,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 235 transitions, 2849 flow [2024-06-27 18:05:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 278 transitions. [2024-06-27 18:05:17,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-27 18:05:17,511 INFO L175 Difference]: Start difference. First operand has 319 places, 190 transitions, 2161 flow. Second operand 16 states and 278 transitions. [2024-06-27 18:05:17,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 235 transitions, 2849 flow [2024-06-27 18:05:17,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 235 transitions, 2701 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-27 18:05:17,786 INFO L231 Difference]: Finished difference. Result has 322 places, 190 transitions, 2141 flow [2024-06-27 18:05:17,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2141, PETRI_PLACES=322, PETRI_TRANSITIONS=190} [2024-06-27 18:05:17,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 18:05:17,787 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 190 transitions, 2141 flow [2024-06-27 18:05:17,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 11 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:17,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:17,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:17,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:05:17,787 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:17,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 151550612, now seen corresponding path program 1 times [2024-06-27 18:05:17,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:17,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926646182] [2024-06-27 18:05:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:17,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:17,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:17,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926646182] [2024-06-27 18:05:17,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926646182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:17,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:17,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:17,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970598374] [2024-06-27 18:05:17,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:17,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:17,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:17,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:17,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 190 transitions, 2141 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:17,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:17,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:17,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:18,393 INFO L124 PetriNetUnfolderBase]: 1094/2457 cut-off events. [2024-06-27 18:05:18,393 INFO L125 PetriNetUnfolderBase]: For 111178/111181 co-relation queries the response was YES. [2024-06-27 18:05:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12254 conditions, 2457 events. 1094/2457 cut-off events. For 111178/111181 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17350 event pairs, 425 based on Foata normal form. 16/2462 useless extension candidates. Maximal degree in co-relation 11722. Up to 1627 conditions per place. [2024-06-27 18:05:18,414 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 172 selfloop transitions, 50 changer transitions 0/232 dead transitions. [2024-06-27 18:05:18,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 232 transitions, 2720 flow [2024-06-27 18:05:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:18,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-27 18:05:18,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46548323471400394 [2024-06-27 18:05:18,415 INFO L175 Difference]: Start difference. First operand has 322 places, 190 transitions, 2141 flow. Second operand 13 states and 236 transitions. [2024-06-27 18:05:18,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 232 transitions, 2720 flow [2024-06-27 18:05:18,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 232 transitions, 2586 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-27 18:05:18,703 INFO L231 Difference]: Finished difference. Result has 320 places, 190 transitions, 2113 flow [2024-06-27 18:05:18,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2113, PETRI_PLACES=320, PETRI_TRANSITIONS=190} [2024-06-27 18:05:18,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 18:05:18,704 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 190 transitions, 2113 flow [2024-06-27 18:05:18,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:18,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:18,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:18,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:05:18,705 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:18,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:18,705 INFO L85 PathProgramCache]: Analyzing trace with hash 967639052, now seen corresponding path program 2 times [2024-06-27 18:05:18,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:18,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530557190] [2024-06-27 18:05:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:18,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530557190] [2024-06-27 18:05:18,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530557190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:18,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:18,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251789470] [2024-06-27 18:05:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:18,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:18,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 190 transitions, 2113 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:18,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:18,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:18,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:19,328 INFO L124 PetriNetUnfolderBase]: 1081/2426 cut-off events. [2024-06-27 18:05:19,328 INFO L125 PetriNetUnfolderBase]: For 89602/89605 co-relation queries the response was YES. [2024-06-27 18:05:19,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11838 conditions, 2426 events. 1081/2426 cut-off events. For 89602/89605 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17119 event pairs, 318 based on Foata normal form. 4/2417 useless extension candidates. Maximal degree in co-relation 11306. Up to 818 conditions per place. [2024-06-27 18:05:19,349 INFO L140 encePairwiseOnDemand]: 29/39 looper letters, 170 selfloop transitions, 58 changer transitions 0/238 dead transitions. [2024-06-27 18:05:19,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 238 transitions, 2816 flow [2024-06-27 18:05:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 18:05:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 18:05:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2024-06-27 18:05:19,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2024-06-27 18:05:19,350 INFO L175 Difference]: Start difference. First operand has 320 places, 190 transitions, 2113 flow. Second operand 13 states and 242 transitions. [2024-06-27 18:05:19,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 238 transitions, 2816 flow [2024-06-27 18:05:19,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 238 transitions, 2738 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:19,611 INFO L231 Difference]: Finished difference. Result has 324 places, 190 transitions, 2154 flow [2024-06-27 18:05:19,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2154, PETRI_PLACES=324, PETRI_TRANSITIONS=190} [2024-06-27 18:05:19,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 18:05:19,612 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 190 transitions, 2154 flow [2024-06-27 18:05:19,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:19,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:19,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:19,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:05:19,613 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:19,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:19,613 INFO L85 PathProgramCache]: Analyzing trace with hash 826966286, now seen corresponding path program 3 times [2024-06-27 18:05:19,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:19,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681393810] [2024-06-27 18:05:19,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:19,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681393810] [2024-06-27 18:05:19,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681393810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:19,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:19,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357059610] [2024-06-27 18:05:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:19,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:19,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:19,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:19,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:19,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:19,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 190 transitions, 2154 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:19,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:19,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:19,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:20,309 INFO L124 PetriNetUnfolderBase]: 1069/2400 cut-off events. [2024-06-27 18:05:20,309 INFO L125 PetriNetUnfolderBase]: For 87606/87609 co-relation queries the response was YES. [2024-06-27 18:05:20,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11312 conditions, 2400 events. 1069/2400 cut-off events. For 87606/87609 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16897 event pairs, 351 based on Foata normal form. 12/2399 useless extension candidates. Maximal degree in co-relation 10769. Up to 1044 conditions per place. [2024-06-27 18:05:20,329 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 175 selfloop transitions, 66 changer transitions 0/251 dead transitions. [2024-06-27 18:05:20,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 251 transitions, 2935 flow [2024-06-27 18:05:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 18:05:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 18:05:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 295 transitions. [2024-06-27 18:05:20,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47275641025641024 [2024-06-27 18:05:20,330 INFO L175 Difference]: Start difference. First operand has 324 places, 190 transitions, 2154 flow. Second operand 16 states and 295 transitions. [2024-06-27 18:05:20,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 251 transitions, 2935 flow [2024-06-27 18:05:20,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 251 transitions, 2778 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 18:05:20,545 INFO L231 Difference]: Finished difference. Result has 328 places, 190 transitions, 2134 flow [2024-06-27 18:05:20,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2134, PETRI_PLACES=328, PETRI_TRANSITIONS=190} [2024-06-27 18:05:20,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 18:05:20,546 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 190 transitions, 2134 flow [2024-06-27 18:05:20,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:20,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:20,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:05:20,546 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:20,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash -561876314, now seen corresponding path program 4 times [2024-06-27 18:05:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:20,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195648106] [2024-06-27 18:05:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195648106] [2024-06-27 18:05:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195648106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:20,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:20,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502212119] [2024-06-27 18:05:20,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:20,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:20,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:20,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 190 transitions, 2134 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:20,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:20,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:20,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:21,233 INFO L124 PetriNetUnfolderBase]: 1061/2387 cut-off events. [2024-06-27 18:05:21,234 INFO L125 PetriNetUnfolderBase]: For 73893/73896 co-relation queries the response was YES. [2024-06-27 18:05:21,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10839 conditions, 2387 events. 1061/2387 cut-off events. For 73893/73896 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16831 event pairs, 344 based on Foata normal form. 8/2382 useless extension candidates. Maximal degree in co-relation 10013. Up to 1140 conditions per place. [2024-06-27 18:05:21,254 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 160 selfloop transitions, 74 changer transitions 0/244 dead transitions. [2024-06-27 18:05:21,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 244 transitions, 2777 flow [2024-06-27 18:05:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 18:05:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 18:05:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 272 transitions. [2024-06-27 18:05:21,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46495726495726497 [2024-06-27 18:05:21,255 INFO L175 Difference]: Start difference. First operand has 328 places, 190 transitions, 2134 flow. Second operand 15 states and 272 transitions. [2024-06-27 18:05:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 244 transitions, 2777 flow [2024-06-27 18:05:21,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 244 transitions, 2638 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 18:05:21,451 INFO L231 Difference]: Finished difference. Result has 331 places, 190 transitions, 2147 flow [2024-06-27 18:05:21,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2147, PETRI_PLACES=331, PETRI_TRANSITIONS=190} [2024-06-27 18:05:21,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 18:05:21,452 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 190 transitions, 2147 flow [2024-06-27 18:05:21,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:21,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:21,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:21,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:05:21,452 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:21,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1508608022, now seen corresponding path program 5 times [2024-06-27 18:05:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:21,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349527595] [2024-06-27 18:05:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:21,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349527595] [2024-06-27 18:05:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349527595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839100263] [2024-06-27 18:05:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:21,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:21,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 190 transitions, 2147 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:21,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:21,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:21,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:22,100 INFO L124 PetriNetUnfolderBase]: 1057/2372 cut-off events. [2024-06-27 18:05:22,101 INFO L125 PetriNetUnfolderBase]: For 64452/64455 co-relation queries the response was YES. [2024-06-27 18:05:22,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10683 conditions, 2372 events. 1057/2372 cut-off events. For 64452/64455 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16659 event pairs, 368 based on Foata normal form. 4/2365 useless extension candidates. Maximal degree in co-relation 10040. Up to 1362 conditions per place. [2024-06-27 18:05:22,119 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 173 selfloop transitions, 47 changer transitions 0/230 dead transitions. [2024-06-27 18:05:22,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 230 transitions, 2719 flow [2024-06-27 18:05:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:05:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:05:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 18:05:22,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-27 18:05:22,120 INFO L175 Difference]: Start difference. First operand has 331 places, 190 transitions, 2147 flow. Second operand 10 states and 198 transitions. [2024-06-27 18:05:22,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 230 transitions, 2719 flow [2024-06-27 18:05:22,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 230 transitions, 2577 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-27 18:05:22,379 INFO L231 Difference]: Finished difference. Result has 329 places, 190 transitions, 2103 flow [2024-06-27 18:05:22,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2103, PETRI_PLACES=329, PETRI_TRANSITIONS=190} [2024-06-27 18:05:22,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 18:05:22,379 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 190 transitions, 2103 flow [2024-06-27 18:05:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:22,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:22,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:05:22,380 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:22,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1422413310, now seen corresponding path program 6 times [2024-06-27 18:05:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914569864] [2024-06-27 18:05:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:22,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:22,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:22,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914569864] [2024-06-27 18:05:22,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914569864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:22,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:22,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256896114] [2024-06-27 18:05:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:22,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:22,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 190 transitions, 2103 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:22,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:22,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:22,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:23,033 INFO L124 PetriNetUnfolderBase]: 1041/2346 cut-off events. [2024-06-27 18:05:23,034 INFO L125 PetriNetUnfolderBase]: For 60506/60509 co-relation queries the response was YES. [2024-06-27 18:05:23,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9687 conditions, 2346 events. 1041/2346 cut-off events. For 60506/60509 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16532 event pairs, 437 based on Foata normal form. 16/2351 useless extension candidates. Maximal degree in co-relation 9311. Up to 1608 conditions per place. [2024-06-27 18:05:23,057 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 172 selfloop transitions, 52 changer transitions 0/234 dead transitions. [2024-06-27 18:05:23,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 234 transitions, 2691 flow [2024-06-27 18:05:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 288 transitions. [2024-06-27 18:05:23,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343891402714932 [2024-06-27 18:05:23,058 INFO L175 Difference]: Start difference. First operand has 329 places, 190 transitions, 2103 flow. Second operand 17 states and 288 transitions. [2024-06-27 18:05:23,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 234 transitions, 2691 flow [2024-06-27 18:05:23,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 234 transitions, 2534 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 18:05:23,171 INFO L231 Difference]: Finished difference. Result has 337 places, 190 transitions, 2056 flow [2024-06-27 18:05:23,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2056, PETRI_PLACES=337, PETRI_TRANSITIONS=190} [2024-06-27 18:05:23,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 18:05:23,171 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 190 transitions, 2056 flow [2024-06-27 18:05:23,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:23,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:23,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:23,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:05:23,172 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:23,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1740793160, now seen corresponding path program 7 times [2024-06-27 18:05:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320874743] [2024-06-27 18:05:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:23,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:23,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:23,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320874743] [2024-06-27 18:05:23,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320874743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:23,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:23,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:05:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968325190] [2024-06-27 18:05:23,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:23,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:05:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:05:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:05:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:23,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 190 transitions, 2056 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:23,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:23,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:23,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:23,780 INFO L124 PetriNetUnfolderBase]: 1037/2332 cut-off events. [2024-06-27 18:05:23,780 INFO L125 PetriNetUnfolderBase]: For 36052/36055 co-relation queries the response was YES. [2024-06-27 18:05:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9300 conditions, 2332 events. 1037/2332 cut-off events. For 36052/36055 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16396 event pairs, 313 based on Foata normal form. 4/2325 useless extension candidates. Maximal degree in co-relation 8905. Up to 994 conditions per place. [2024-06-27 18:05:23,796 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 167 selfloop transitions, 60 changer transitions 0/237 dead transitions. [2024-06-27 18:05:23,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 237 transitions, 2658 flow [2024-06-27 18:05:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 18:05:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 18:05:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-06-27 18:05:23,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 18:05:23,797 INFO L175 Difference]: Start difference. First operand has 337 places, 190 transitions, 2056 flow. Second operand 14 states and 252 transitions. [2024-06-27 18:05:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 237 transitions, 2658 flow [2024-06-27 18:05:23,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 237 transitions, 2566 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 18:05:23,897 INFO L231 Difference]: Finished difference. Result has 337 places, 190 transitions, 2087 flow [2024-06-27 18:05:23,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2087, PETRI_PLACES=337, PETRI_TRANSITIONS=190} [2024-06-27 18:05:23,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 18:05:23,898 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 190 transitions, 2087 flow [2024-06-27 18:05:23,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:23,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:23,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:23,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:05:23,898 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:23,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:23,899 INFO L85 PathProgramCache]: Analyzing trace with hash -193577254, now seen corresponding path program 8 times [2024-06-27 18:05:23,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:23,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923474703] [2024-06-27 18:05:23,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:23,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:24,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923474703] [2024-06-27 18:05:24,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923474703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:24,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:24,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:24,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450265356] [2024-06-27 18:05:24,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:24,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:24,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:24,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:24,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 190 transitions, 2087 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:24,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:24,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:24,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:24,561 INFO L124 PetriNetUnfolderBase]: 1025/2313 cut-off events. [2024-06-27 18:05:24,561 INFO L125 PetriNetUnfolderBase]: For 31155/31158 co-relation queries the response was YES. [2024-06-27 18:05:24,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8679 conditions, 2313 events. 1025/2313 cut-off events. For 31155/31158 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16307 event pairs, 365 based on Foata normal form. 12/2314 useless extension candidates. Maximal degree in co-relation 8302. Up to 1309 conditions per place. [2024-06-27 18:05:24,580 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 172 selfloop transitions, 64 changer transitions 0/246 dead transitions. [2024-06-27 18:05:24,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 246 transitions, 2723 flow [2024-06-27 18:05:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 18:05:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 18:05:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-06-27 18:05:24,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 18:05:24,581 INFO L175 Difference]: Start difference. First operand has 337 places, 190 transitions, 2087 flow. Second operand 20 states and 338 transitions. [2024-06-27 18:05:24,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 246 transitions, 2723 flow [2024-06-27 18:05:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 246 transitions, 2529 flow, removed 4 selfloop flow, removed 16 redundant places. [2024-06-27 18:05:24,650 INFO L231 Difference]: Finished difference. Result has 341 places, 190 transitions, 2026 flow [2024-06-27 18:05:24,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2026, PETRI_PLACES=341, PETRI_TRANSITIONS=190} [2024-06-27 18:05:24,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 18:05:24,651 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 190 transitions, 2026 flow [2024-06-27 18:05:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:24,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:24,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:05:24,651 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:24,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -768648290, now seen corresponding path program 9 times [2024-06-27 18:05:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077801001] [2024-06-27 18:05:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:24,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:24,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077801001] [2024-06-27 18:05:24,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077801001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:24,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:24,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 18:05:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52935931] [2024-06-27 18:05:24,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 18:05:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 18:05:24,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 18:05:24,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-06-27 18:05:24,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 190 transitions, 2026 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:24,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:24,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-06-27 18:05:24,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:25,301 INFO L124 PetriNetUnfolderBase]: 1021/2305 cut-off events. [2024-06-27 18:05:25,301 INFO L125 PetriNetUnfolderBase]: For 11913/11916 co-relation queries the response was YES. [2024-06-27 18:05:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8290 conditions, 2305 events. 1021/2305 cut-off events. For 11913/11916 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16269 event pairs, 369 based on Foata normal form. 4/2298 useless extension candidates. Maximal degree in co-relation 8156. Up to 1396 conditions per place. [2024-06-27 18:05:25,328 INFO L140 encePairwiseOnDemand]: 27/39 looper letters, 158 selfloop transitions, 65 changer transitions 0/233 dead transitions. [2024-06-27 18:05:25,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 233 transitions, 2488 flow [2024-06-27 18:05:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 18:05:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 18:05:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 285 transitions. [2024-06-27 18:05:25,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298642533936652 [2024-06-27 18:05:25,329 INFO L175 Difference]: Start difference. First operand has 341 places, 190 transitions, 2026 flow. Second operand 17 states and 285 transitions. [2024-06-27 18:05:25,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 233 transitions, 2488 flow [2024-06-27 18:05:25,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 233 transitions, 2130 flow, removed 0 selfloop flow, removed 73 redundant places. [2024-06-27 18:05:25,355 INFO L231 Difference]: Finished difference. Result has 283 places, 189 transitions, 1682 flow [2024-06-27 18:05:25,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1682, PETRI_PLACES=283, PETRI_TRANSITIONS=189} [2024-06-27 18:05:25,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 18:05:25,356 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 189 transitions, 1682 flow [2024-06-27 18:05:25,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:25,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:25,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:05:25,357 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:25,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:25,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1154710143, now seen corresponding path program 1 times [2024-06-27 18:05:25,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:25,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193981743] [2024-06-27 18:05:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:25,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:25,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193981743] [2024-06-27 18:05:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193981743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:25,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:25,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:25,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478555145] [2024-06-27 18:05:25,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:25,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:25,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-06-27 18:05:25,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 189 transitions, 1682 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:25,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-06-27 18:05:25,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:25,665 INFO L124 PetriNetUnfolderBase]: 797/2067 cut-off events. [2024-06-27 18:05:25,665 INFO L125 PetriNetUnfolderBase]: For 3290/3314 co-relation queries the response was YES. [2024-06-27 18:05:25,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6883 conditions, 2067 events. 797/2067 cut-off events. For 3290/3314 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15937 event pairs, 242 based on Foata normal form. 12/2034 useless extension candidates. Maximal degree in co-relation 6497. Up to 431 conditions per place. [2024-06-27 18:05:25,674 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 32 selfloop transitions, 17 changer transitions 114/210 dead transitions. [2024-06-27 18:05:25,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 210 transitions, 1967 flow [2024-06-27 18:05:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:05:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:05:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:05:25,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-06-27 18:05:25,676 INFO L175 Difference]: Start difference. First operand has 283 places, 189 transitions, 1682 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:05:25,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 210 transitions, 1967 flow [2024-06-27 18:05:25,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 210 transitions, 1810 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-27 18:05:25,685 INFO L231 Difference]: Finished difference. Result has 276 places, 92 transitions, 604 flow [2024-06-27 18:05:25,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=276, PETRI_TRANSITIONS=92} [2024-06-27 18:05:25,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 18:05:25,687 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 92 transitions, 604 flow [2024-06-27 18:05:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:05:25,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:25,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:05:25,688 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 18:05:25,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:05:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1461223033, now seen corresponding path program 2 times [2024-06-27 18:05:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:05:25,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626176982] [2024-06-27 18:05:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:05:25,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:05:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:05:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:05:25,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:05:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626176982] [2024-06-27 18:05:25,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626176982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:05:25,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:05:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:05:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390844981] [2024-06-27 18:05:25,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:05:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:05:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:05:25,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:05:25,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:05:25,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 39 [2024-06-27 18:05:25,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 92 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:05:25,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 39 [2024-06-27 18:05:25,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:05:25,870 INFO L124 PetriNetUnfolderBase]: 286/777 cut-off events. [2024-06-27 18:05:25,870 INFO L125 PetriNetUnfolderBase]: For 835/850 co-relation queries the response was YES. [2024-06-27 18:05:25,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 777 events. 286/777 cut-off events. For 835/850 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4893 event pairs, 68 based on Foata normal form. 9/767 useless extension candidates. Maximal degree in co-relation 2346. Up to 251 conditions per place. [2024-06-27 18:05:25,873 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 0 selfloop transitions, 0 changer transitions 96/96 dead transitions. [2024-06-27 18:05:25,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 96 transitions, 712 flow [2024-06-27 18:05:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:05:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:05:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 18:05:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594017094017094 [2024-06-27 18:05:25,874 INFO L175 Difference]: Start difference. First operand has 276 places, 92 transitions, 604 flow. Second operand 6 states and 139 transitions. [2024-06-27 18:05:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 96 transitions, 712 flow [2024-06-27 18:05:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 96 transitions, 558 flow, removed 6 selfloop flow, removed 31 redundant places. [2024-06-27 18:05:25,877 INFO L231 Difference]: Finished difference. Result has 134 places, 0 transitions, 0 flow [2024-06-27 18:05:25,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=134, PETRI_TRANSITIONS=0} [2024-06-27 18:05:25,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-27 18:05:25,878 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 0 transitions, 0 flow [2024-06-27 18:05:25,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:05:25,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 18:05:25,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 18:05:25,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 18:05:25,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 18:05:25,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 18:05:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:05:25,884 INFO L445 BasicCegarLoop]: Path program histogram: [11, 10, 10, 9, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:05:25,887 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 18:05:25,887 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 18:05:25,890 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 18:05:25,890 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 18:05:25,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 06:05:25 BasicIcfg [2024-06-27 18:05:25,891 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 18:05:25,891 INFO L158 Benchmark]: Toolchain (without parser) took 44952.24ms. Allocated memory was 186.6MB in the beginning and 1.1GB in the end (delta: 866.1MB). Free memory was 147.4MB in the beginning and 856.4MB in the end (delta: -709.0MB). Peak memory consumption was 158.2MB. Max. memory is 16.1GB. [2024-06-27 18:05:25,892 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:05:25,892 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 71.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:05:25,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.49ms. Allocated memory is still 186.6MB. Free memory was 147.0MB in the beginning and 132.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-27 18:05:25,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.05ms. Allocated memory is still 186.6MB. Free memory was 132.3MB in the beginning and 130.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 18:05:25,893 INFO L158 Benchmark]: Boogie Preprocessor took 51.27ms. Allocated memory is still 186.6MB. Free memory was 130.6MB in the beginning and 128.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 18:05:25,893 INFO L158 Benchmark]: RCFGBuilder took 440.24ms. Allocated memory is still 186.6MB. Free memory was 128.5MB in the beginning and 104.6MB in the end (delta: 23.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-27 18:05:25,893 INFO L158 Benchmark]: TraceAbstraction took 44080.87ms. Allocated memory was 186.6MB in the beginning and 1.1GB in the end (delta: 866.1MB). Free memory was 104.2MB in the beginning and 856.4MB in the end (delta: -752.2MB). Peak memory consumption was 114.1MB. Max. memory is 16.1GB. [2024-06-27 18:05:25,895 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.15ms. Allocated memory is still 121.6MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory was 93.2MB in the beginning and 93.1MB in the end (delta: 71.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.49ms. Allocated memory is still 186.6MB. Free memory was 147.0MB in the beginning and 132.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.05ms. Allocated memory is still 186.6MB. Free memory was 132.3MB in the beginning and 130.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.27ms. Allocated memory is still 186.6MB. Free memory was 130.6MB in the beginning and 128.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.24ms. Allocated memory is still 186.6MB. Free memory was 128.5MB in the beginning and 104.6MB in the end (delta: 23.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 44080.87ms. Allocated memory was 186.6MB in the beginning and 1.1GB in the end (delta: 866.1MB). Free memory was 104.2MB in the beginning and 856.4MB in the end (delta: -752.2MB). Peak memory consumption was 114.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 111]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 112]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 116]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 66 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 44.0s, OverallIterations: 72, TraceHistogramMax: 1, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 34.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6527 SdHoareTripleChecker+Valid, 9.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5894 mSDsluCounter, 1516 SdHoareTripleChecker+Invalid, 7.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1024 mSDsCounter, 968 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21358 IncrementalHoareTripleChecker+Invalid, 22326 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 968 mSolverCounterUnsat, 492 mSDtfsCounter, 21358 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 934 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 924 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2161occurred in iteration=60, InterpolantAutomatonStates: 830, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 1645 NumberOfCodeBlocks, 1645 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 1573 ConstructedInterpolants, 0 QuantifiedInterpolants, 17722 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 72 InterpolantComputations, 72 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 18:05:25,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE