./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/triangular-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/triangular-1.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:49:30,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:49:30,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:49:30,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:49:30,284 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:49:30,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:49:30,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:49:30,299 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:49:30,299 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:49:30,299 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:49:30,300 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:49:30,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:49:30,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:49:30,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:49:30,301 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:49:30,301 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:49:30,302 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:49:30,302 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:49:30,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:49:30,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:49:30,303 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:49:30,303 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:49:30,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:49:30,304 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:49:30,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:49:30,304 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:49:30,312 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:49:30,312 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:49:30,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:49:30,312 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:49:30,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:49:30,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:49:30,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:30,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:49:30,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:49:30,314 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:49:30,314 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:49:30,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:49:30,314 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:49:30,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:49:30,315 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:49:30,315 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:49:30,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:49:30,315 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:49:30,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:49:30,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:49:30,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:49:30,553 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:49:30,554 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:49:30,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/triangular-1.yml/witness.yml [2024-06-27 21:49:30,622 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:49:30,622 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:49:30,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2024-06-27 21:49:31,698 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:49:31,880 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:49:31,881 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2024-06-27 21:49:31,893 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4b7c133/c8d0cdd6041043cbb0df7b2a7140f487/FLAG7bc305b2b [2024-06-27 21:49:31,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c4b7c133/c8d0cdd6041043cbb0df7b2a7140f487 [2024-06-27 21:49:31,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:49:31,904 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:49:31,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:31,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:49:31,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:49:31,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:30" (1/2) ... [2024-06-27 21:49:31,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4cfc87 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31, skipping insertion in model container [2024-06-27 21:49:31,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:30" (1/2) ... [2024-06-27 21:49:31,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@247bf42 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31, skipping insertion in model container [2024-06-27 21:49:31,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:31" (2/2) ... [2024-06-27 21:49:31,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b4cfc87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:31, skipping insertion in model container [2024-06-27 21:49:31,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:31" (2/2) ... [2024-06-27 21:49:31,912 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:49:31,925 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:49:31,926 INFO L97 edCorrectnessWitness]: Location invariant before [L714-L714] ! multithreaded || (1LL - (long long )i) + (long long )j >= 0LL [2024-06-27 21:49:31,926 INFO L97 edCorrectnessWitness]: Location invariant before [L715-L715] ! multithreaded || (1LL - (long long )i) + (long long )j >= 0LL [2024-06-27 21:49:31,927 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:49:31,927 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] multithreaded = 1; [2024-06-27 21:49:31,960 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:49:32,226 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2024-06-27 21:49:32,229 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:32,235 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:49:32,307 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2024-06-27 21:49:32,308 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:32,330 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:49:32,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32 WrapperNode [2024-06-27 21:49:32,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:32,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:32,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:49:32,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:49:32,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,358 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-06-27 21:49:32,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:32,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:49:32,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:49:32,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:49:32,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,378 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 21:49:32,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:49:32,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:49:32,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:49:32,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:49:32,388 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (1/1) ... [2024-06-27 21:49:32,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:32,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:49:32,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:49:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 21:49:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 21:49:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 21:49:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 21:49:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:49:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:49:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:49:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:49:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:49:32,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:49:32,796 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:49:32,885 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:49:32,886 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:49:33,000 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:49:33,001 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:49:33,061 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:49:33,061 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 21:49:33,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:33 BoogieIcfgContainer [2024-06-27 21:49:33,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:49:33,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:49:33,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:49:33,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:49:33,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:30" (1/4) ... [2024-06-27 21:49:33,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a684b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:49:33, skipping insertion in model container [2024-06-27 21:49:33,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:49:31" (2/4) ... [2024-06-27 21:49:33,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a684b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:49:33, skipping insertion in model container [2024-06-27 21:49:33,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:49:32" (3/4) ... [2024-06-27 21:49:33,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a684b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:49:33, skipping insertion in model container [2024-06-27 21:49:33,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:33" (4/4) ... [2024-06-27 21:49:33,067 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2024-06-27 21:49:33,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:49:33,079 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:49:33,080 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:49:33,107 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:49:33,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-27 21:49:33,146 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-27 21:49:33,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:33,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-06-27 21:49:33,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-27 21:49:33,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-27 21:49:33,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:49:33,163 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;@1b7a262d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:49:33,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:49:33,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:49:33,167 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:49:33,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:33,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:49:33,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:33,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 176651994, now seen corresponding path program 1 times [2024-06-27 21:49:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595858728] [2024-06-27 21:49:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:33,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595858728] [2024-06-27 21:49:33,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595858728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:49:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407530395] [2024-06-27 21:49:33,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:49:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:49:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:49:33,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 21:49:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:33,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 21:49:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:33,471 INFO L124 PetriNetUnfolderBase]: 172/337 cut-off events. [2024-06-27 21:49:33,471 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 21:49:33,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 337 events. 172/337 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1436 event pairs, 45 based on Foata normal form. 20/331 useless extension candidates. Maximal degree in co-relation 625. Up to 211 conditions per place. [2024-06-27 21:49:33,475 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 23 selfloop transitions, 3 changer transitions 2/37 dead transitions. [2024-06-27 21:49:33,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 139 flow [2024-06-27 21:49:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:49:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:49:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-27 21:49:33,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7471264367816092 [2024-06-27 21:49:33,487 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 3 states and 65 transitions. [2024-06-27 21:49:33,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 139 flow [2024-06-27 21:49:33,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:49:33,491 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 75 flow [2024-06-27 21:49:33,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-06-27 21:49:33,495 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-27 21:49:33,495 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 75 flow [2024-06-27 21:49:33,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:33,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:33,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:49:33,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:33,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1314428841, now seen corresponding path program 1 times [2024-06-27 21:49:33,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552136610] [2024-06-27 21:49:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:33,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552136610] [2024-06-27 21:49:33,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552136610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:49:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352064931] [2024-06-27 21:49:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:49:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:49:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:49:33,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 21:49:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:33,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 21:49:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:33,640 INFO L124 PetriNetUnfolderBase]: 91/268 cut-off events. [2024-06-27 21:49:33,640 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-27 21:49:33,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 268 events. 91/268 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1333 event pairs, 62 based on Foata normal form. 18/263 useless extension candidates. Maximal degree in co-relation 482. Up to 158 conditions per place. [2024-06-27 21:49:33,643 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 15 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-06-27 21:49:33,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 99 flow [2024-06-27 21:49:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:49:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:49:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 21:49:33,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-06-27 21:49:33,645 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 75 flow. Second operand 3 states and 49 transitions. [2024-06-27 21:49:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 99 flow [2024-06-27 21:49:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 25 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:49:33,646 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2024-06-27 21:49:33,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-06-27 21:49:33,647 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-27 21:49:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2024-06-27 21:49:33,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:33,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:33,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:49:33,648 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 344931938, now seen corresponding path program 1 times [2024-06-27 21:49:33,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193932912] [2024-06-27 21:49:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:33,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193932912] [2024-06-27 21:49:33,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193932912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:49:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345739771] [2024-06-27 21:49:33,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:49:33,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:49:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:49:33,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-27 21:49:33,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:33,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-27 21:49:33,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,015 INFO L124 PetriNetUnfolderBase]: 334/577 cut-off events. [2024-06-27 21:49:34,015 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-06-27 21:49:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 577 events. 334/577 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2319 event pairs, 49 based on Foata normal form. 0/555 useless extension candidates. Maximal degree in co-relation 1225. Up to 250 conditions per place. [2024-06-27 21:49:34,019 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 31 selfloop transitions, 7 changer transitions 28/71 dead transitions. [2024-06-27 21:49:34,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 71 transitions, 312 flow [2024-06-27 21:49:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:49:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:49:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:49:34,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077586206896551 [2024-06-27 21:49:34,021 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:49:34,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 71 transitions, 312 flow [2024-06-27 21:49:34,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 71 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:49:34,023 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 116 flow [2024-06-27 21:49:34,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2024-06-27 21:49:34,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-27 21:49:34,024 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 116 flow [2024-06-27 21:49:34,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:34,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:49:34,025 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:34,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1725427149, now seen corresponding path program 1 times [2024-06-27 21:49:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262182619] [2024-06-27 21:49:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:34,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262182619] [2024-06-27 21:49:34,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262182619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:34,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:34,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:34,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783088717] [2024-06-27 21:49:34,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:34,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-27 21:49:34,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-27 21:49:34,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,318 INFO L124 PetriNetUnfolderBase]: 253/463 cut-off events. [2024-06-27 21:49:34,318 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-27 21:49:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 463 events. 253/463 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1849 event pairs, 76 based on Foata normal form. 18/468 useless extension candidates. Maximal degree in co-relation 1218. Up to 190 conditions per place. [2024-06-27 21:49:34,321 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 28 selfloop transitions, 8 changer transitions 15/56 dead transitions. [2024-06-27 21:49:34,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 312 flow [2024-06-27 21:49:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:49:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:49:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:49:34,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2024-06-27 21:49:34,323 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 116 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:49:34,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 312 flow [2024-06-27 21:49:34,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 298 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 21:49:34,326 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 158 flow [2024-06-27 21:49:34,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-06-27 21:49:34,327 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-27 21:49:34,327 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 158 flow [2024-06-27 21:49:34,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:49:34,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:34,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2107222436, now seen corresponding path program 1 times [2024-06-27 21:49:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208315000] [2024-06-27 21:49:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208315000] [2024-06-27 21:49:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208315000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:34,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955485273] [2024-06-27 21:49:34,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:34,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:34,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,639 INFO L124 PetriNetUnfolderBase]: 424/760 cut-off events. [2024-06-27 21:49:34,639 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2024-06-27 21:49:34,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 760 events. 424/760 cut-off events. For 1274/1274 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3319 event pairs, 100 based on Foata normal form. 27/780 useless extension candidates. Maximal degree in co-relation 2226. Up to 265 conditions per place. [2024-06-27 21:49:34,645 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 50 selfloop transitions, 11 changer transitions 24/90 dead transitions. [2024-06-27 21:49:34,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 90 transitions, 562 flow [2024-06-27 21:49:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:49:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:49:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 21:49:34,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-06-27 21:49:34,650 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 158 flow. Second operand 10 states and 152 transitions. [2024-06-27 21:49:34,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 90 transitions, 562 flow [2024-06-27 21:49:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 90 transitions, 525 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:49:34,657 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 235 flow [2024-06-27 21:49:34,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2024-06-27 21:49:34,661 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-27 21:49:34,662 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 235 flow [2024-06-27 21:49:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:49:34,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:34,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1447649696, now seen corresponding path program 2 times [2024-06-27 21:49:34,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432831062] [2024-06-27 21:49:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:34,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432831062] [2024-06-27 21:49:34,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432831062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:34,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:34,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349580891] [2024-06-27 21:49:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:34,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:34,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:34,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,965 INFO L124 PetriNetUnfolderBase]: 370/685 cut-off events. [2024-06-27 21:49:34,965 INFO L125 PetriNetUnfolderBase]: For 2517/2517 co-relation queries the response was YES. [2024-06-27 21:49:34,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 685 events. 370/685 cut-off events. For 2517/2517 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3000 event pairs, 103 based on Foata normal form. 27/705 useless extension candidates. Maximal degree in co-relation 2328. Up to 334 conditions per place. [2024-06-27 21:49:34,971 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 41 selfloop transitions, 13 changer transitions 27/86 dead transitions. [2024-06-27 21:49:34,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 658 flow [2024-06-27 21:49:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:49:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:49:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-27 21:49:34,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095785440613027 [2024-06-27 21:49:34,973 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 235 flow. Second operand 9 states and 133 transitions. [2024-06-27 21:49:34,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 658 flow [2024-06-27 21:49:34,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 609 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 21:49:34,981 INFO L231 Difference]: Finished difference. Result has 62 places, 42 transitions, 314 flow [2024-06-27 21:49:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=314, PETRI_PLACES=62, PETRI_TRANSITIONS=42} [2024-06-27 21:49:34,984 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-27 21:49:34,984 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 42 transitions, 314 flow [2024-06-27 21:49:34,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:34,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,985 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 21:49:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:49:34,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:34,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -601290451, now seen corresponding path program 1 times [2024-06-27 21:49:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920152353] [2024-06-27 21:49:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:35,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920152353] [2024-06-27 21:49:35,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920152353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:35,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:35,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:49:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006856723] [2024-06-27 21:49:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:35,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:49:35,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:49:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:49:35,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:35,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 42 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:35,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:35,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:35,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:35,296 INFO L124 PetriNetUnfolderBase]: 433/806 cut-off events. [2024-06-27 21:49:35,296 INFO L125 PetriNetUnfolderBase]: For 3506/3506 co-relation queries the response was YES. [2024-06-27 21:49:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2867 conditions, 806 events. 433/806 cut-off events. For 3506/3506 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3591 event pairs, 76 based on Foata normal form. 27/820 useless extension candidates. Maximal degree in co-relation 2839. Up to 223 conditions per place. [2024-06-27 21:49:35,301 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 43 selfloop transitions, 20 changer transitions 28/96 dead transitions. [2024-06-27 21:49:35,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 787 flow [2024-06-27 21:49:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:49:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:49:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-27 21:49:35,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503448275862069 [2024-06-27 21:49:35,303 INFO L175 Difference]: Start difference. First operand has 62 places, 42 transitions, 314 flow. Second operand 10 states and 146 transitions. [2024-06-27 21:49:35,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 787 flow [2024-06-27 21:49:35,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 760 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:49:35,330 INFO L231 Difference]: Finished difference. Result has 70 places, 47 transitions, 425 flow [2024-06-27 21:49:35,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2024-06-27 21:49:35,331 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-27 21:49:35,331 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 425 flow [2024-06-27 21:49:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:35,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:35,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:35,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:49:35,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1291823508, now seen corresponding path program 1 times [2024-06-27 21:49:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290868375] [2024-06-27 21:49:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:35,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290868375] [2024-06-27 21:49:35,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290868375] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:35,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454694780] [2024-06-27 21:49:35,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:35,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:35,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:35,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 21:49:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:35,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 21:49:35,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454694780] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:35,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:35,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-06-27 21:49:35,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826839103] [2024-06-27 21:49:35,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:35,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:49:35,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:35,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:49:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:49:35,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:35,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 425 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:35,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:35,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:35,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:36,088 INFO L124 PetriNetUnfolderBase]: 649/1187 cut-off events. [2024-06-27 21:49:36,088 INFO L125 PetriNetUnfolderBase]: For 9674/9674 co-relation queries the response was YES. [2024-06-27 21:49:36,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 1187 events. 649/1187 cut-off events. For 9674/9674 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5372 event pairs, 64 based on Foata normal form. 45/1219 useless extension candidates. Maximal degree in co-relation 4915. Up to 271 conditions per place. [2024-06-27 21:49:36,095 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 65 selfloop transitions, 35 changer transitions 56/161 dead transitions. [2024-06-27 21:49:36,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 161 transitions, 1533 flow [2024-06-27 21:49:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 21:49:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 21:49:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 275 transitions. [2024-06-27 21:49:36,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49909255898366606 [2024-06-27 21:49:36,098 INFO L175 Difference]: Start difference. First operand has 70 places, 47 transitions, 425 flow. Second operand 19 states and 275 transitions. [2024-06-27 21:49:36,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 161 transitions, 1533 flow [2024-06-27 21:49:36,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 161 transitions, 1416 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 21:49:36,111 INFO L231 Difference]: Finished difference. Result has 88 places, 63 transitions, 751 flow [2024-06-27 21:49:36,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=751, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2024-06-27 21:49:36,113 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-06-27 21:49:36,113 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 751 flow [2024-06-27 21:49:36,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:36,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:36,114 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:36,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:36,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:36,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 640991022, now seen corresponding path program 1 times [2024-06-27 21:49:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:36,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154183305] [2024-06-27 21:49:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154183305] [2024-06-27 21:49:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154183305] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326089169] [2024-06-27 21:49:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:36,535 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:36,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 21:49:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:36,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 21:49:36,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:36,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:36,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326089169] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:36,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:36,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-06-27 21:49:36,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243020345] [2024-06-27 21:49:36,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:36,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-06-27 21:49:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-06-27 21:49:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-06-27 21:49:36,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:36,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 751 flow. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:36,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:36,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:36,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:37,634 INFO L124 PetriNetUnfolderBase]: 1333/2475 cut-off events. [2024-06-27 21:49:37,634 INFO L125 PetriNetUnfolderBase]: For 30836/30836 co-relation queries the response was YES. [2024-06-27 21:49:37,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11809 conditions, 2475 events. 1333/2475 cut-off events. For 30836/30836 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 13038 event pairs, 136 based on Foata normal form. 81/2549 useless extension candidates. Maximal degree in co-relation 11771. Up to 595 conditions per place. [2024-06-27 21:49:37,651 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 128 selfloop transitions, 68 changer transitions 91/292 dead transitions. [2024-06-27 21:49:37,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 292 transitions, 3538 flow [2024-06-27 21:49:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 21:49:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 21:49:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 459 transitions. [2024-06-27 21:49:37,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49461206896551724 [2024-06-27 21:49:37,654 INFO L175 Difference]: Start difference. First operand has 88 places, 63 transitions, 751 flow. Second operand 32 states and 459 transitions. [2024-06-27 21:49:37,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 292 transitions, 3538 flow [2024-06-27 21:49:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 292 transitions, 2531 flow, removed 488 selfloop flow, removed 10 redundant places. [2024-06-27 21:49:37,687 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 1298 flow [2024-06-27 21:49:37,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1298, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2024-06-27 21:49:37,688 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 96 predicate places. [2024-06-27 21:49:37,688 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 1298 flow [2024-06-27 21:49:37,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 17 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:37,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:37,688 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:37,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:37,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-06-27 21:49:37,901 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:37,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:37,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1869179120, now seen corresponding path program 2 times [2024-06-27 21:49:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:37,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225632451] [2024-06-27 21:49:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225632451] [2024-06-27 21:49:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225632451] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947553088] [2024-06-27 21:49:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:49:38,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:38,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 21:49:38,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:49:38,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:38,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 21:49:38,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:38,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947553088] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:38,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-06-27 21:49:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922088297] [2024-06-27 21:49:38,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-06-27 21:49:38,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:38,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-06-27 21:49:38,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-06-27 21:49:38,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:38,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 1298 flow. Second operand has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:38,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:38,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:39,165 INFO L124 PetriNetUnfolderBase]: 1720/3196 cut-off events. [2024-06-27 21:49:39,165 INFO L125 PetriNetUnfolderBase]: For 88359/88359 co-relation queries the response was YES. [2024-06-27 21:49:39,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17405 conditions, 3196 events. 1720/3196 cut-off events. For 88359/88359 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17891 event pairs, 56 based on Foata normal form. 117/3306 useless extension candidates. Maximal degree in co-relation 17349. Up to 649 conditions per place. [2024-06-27 21:49:39,191 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 125 selfloop transitions, 109 changer transitions 115/354 dead transitions. [2024-06-27 21:49:39,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 354 transitions, 4821 flow [2024-06-27 21:49:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-27 21:49:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-27 21:49:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 517 transitions. [2024-06-27 21:49:39,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952107279693487 [2024-06-27 21:49:39,193 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 1298 flow. Second operand 36 states and 517 transitions. [2024-06-27 21:49:39,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 354 transitions, 4821 flow [2024-06-27 21:49:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 354 transitions, 4109 flow, removed 340 selfloop flow, removed 16 redundant places. [2024-06-27 21:49:39,377 INFO L231 Difference]: Finished difference. Result has 160 places, 144 transitions, 2077 flow [2024-06-27 21:49:39,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2077, PETRI_PLACES=160, PETRI_TRANSITIONS=144} [2024-06-27 21:49:39,378 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2024-06-27 21:49:39,378 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 144 transitions, 2077 flow [2024-06-27 21:49:39,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 18 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:39,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:39,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:39,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:39,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:39,595 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:39,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:39,596 INFO L85 PathProgramCache]: Analyzing trace with hash -653633647, now seen corresponding path program 3 times [2024-06-27 21:49:39,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:39,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853439223] [2024-06-27 21:49:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:39,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:39,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:39,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853439223] [2024-06-27 21:49:39,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853439223] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:39,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693252739] [2024-06-27 21:49:39,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:49:39,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:39,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 21:49:39,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-06-27 21:49:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:39,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 21:49:39,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:39,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693252739] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:39,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-06-27 21:49:39,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160113275] [2024-06-27 21:49:39,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 21:49:39,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 21:49:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-06-27 21:49:40,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:40,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 144 transitions, 2077 flow. Second operand has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:40,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:40,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:40,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:41,143 INFO L124 PetriNetUnfolderBase]: 1909/3555 cut-off events. [2024-06-27 21:49:41,143 INFO L125 PetriNetUnfolderBase]: For 136511/136511 co-relation queries the response was YES. [2024-06-27 21:49:41,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21583 conditions, 3555 events. 1909/3555 cut-off events. For 136511/136511 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 19937 event pairs, 114 based on Foata normal form. 36/3578 useless extension candidates. Maximal degree in co-relation 21515. Up to 709 conditions per place. [2024-06-27 21:49:41,199 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 123 selfloop transitions, 121 changer transitions 63/312 dead transitions. [2024-06-27 21:49:41,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 312 transitions, 5093 flow [2024-06-27 21:49:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 21:49:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 21:49:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 385 transitions. [2024-06-27 21:49:41,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49169859514687103 [2024-06-27 21:49:41,210 INFO L175 Difference]: Start difference. First operand has 160 places, 144 transitions, 2077 flow. Second operand 27 states and 385 transitions. [2024-06-27 21:49:41,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 312 transitions, 5093 flow [2024-06-27 21:49:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 312 transitions, 4195 flow, removed 413 selfloop flow, removed 21 redundant places. [2024-06-27 21:49:41,502 INFO L231 Difference]: Finished difference. Result has 168 places, 172 transitions, 2574 flow [2024-06-27 21:49:41,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2574, PETRI_PLACES=168, PETRI_TRANSITIONS=172} [2024-06-27 21:49:41,503 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 137 predicate places. [2024-06-27 21:49:41,503 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 172 transitions, 2574 flow [2024-06-27 21:49:41,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:41,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:41,503 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:41,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:41,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:41,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1996657442, now seen corresponding path program 4 times [2024-06-27 21:49:41,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:41,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443553628] [2024-06-27 21:49:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:41,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:41,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443553628] [2024-06-27 21:49:41,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443553628] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459371486] [2024-06-27 21:49:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:49:41,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:41,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:41,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 21:49:41,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:49:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:41,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 21:49:41,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:41,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:49:41,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459371486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:41,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:49:41,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-06-27 21:49:41,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733325956] [2024-06-27 21:49:41,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:41,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:49:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:49:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:49:41,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2024-06-27 21:49:41,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 172 transitions, 2574 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:41,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:41,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2024-06-27 21:49:41,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:43,131 INFO L124 PetriNetUnfolderBase]: 3199/6441 cut-off events. [2024-06-27 21:49:43,131 INFO L125 PetriNetUnfolderBase]: For 157845/158310 co-relation queries the response was YES. [2024-06-27 21:49:43,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29078 conditions, 6441 events. 3199/6441 cut-off events. For 157845/158310 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 48673 event pairs, 212 based on Foata normal form. 121/5910 useless extension candidates. Maximal degree in co-relation 29008. Up to 1194 conditions per place. [2024-06-27 21:49:43,186 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 49 selfloop transitions, 12 changer transitions 81/219 dead transitions. [2024-06-27 21:49:43,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 219 transitions, 2632 flow [2024-06-27 21:49:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:49:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:49:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 21:49:43,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7801724137931034 [2024-06-27 21:49:43,187 INFO L175 Difference]: Start difference. First operand has 168 places, 172 transitions, 2574 flow. Second operand 8 states and 181 transitions. [2024-06-27 21:49:43,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 219 transitions, 2632 flow [2024-06-27 21:49:43,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 219 transitions, 2326 flow, removed 123 selfloop flow, removed 11 redundant places. [2024-06-27 21:49:43,516 INFO L231 Difference]: Finished difference. Result has 161 places, 99 transitions, 1098 flow [2024-06-27 21:49:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=161, PETRI_TRANSITIONS=99} [2024-06-27 21:49:43,522 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 130 predicate places. [2024-06-27 21:49:43,522 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 99 transitions, 1098 flow [2024-06-27 21:49:43,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:43,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:43,522 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:43,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 21:49:43,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 21:49:43,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:49:43,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 309099277, now seen corresponding path program 5 times [2024-06-27 21:49:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:43,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028220138] [2024-06-27 21:49:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:43,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:43,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028220138] [2024-06-27 21:49:43,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028220138] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:43,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972041872] [2024-06-27 21:49:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:49:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:43,797 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:49:43,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 21:49:43,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-06-27 21:49:43,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:43,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2024-06-27 21:49:43,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:43,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:49:43,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972041872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:43,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:49:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2024-06-27 21:49:43,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53926520] [2024-06-27 21:49:43,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:43,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:49:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:49:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:49:43,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2024-06-27 21:49:43,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 99 transitions, 1098 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:43,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:43,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2024-06-27 21:49:43,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:44,993 INFO L124 PetriNetUnfolderBase]: 4923/9088 cut-off events. [2024-06-27 21:49:44,993 INFO L125 PetriNetUnfolderBase]: For 93359/93874 co-relation queries the response was YES. [2024-06-27 21:49:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34096 conditions, 9088 events. 4923/9088 cut-off events. For 93359/93874 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 69139 event pairs, 222 based on Foata normal form. 111/8333 useless extension candidates. Maximal degree in co-relation 34035. Up to 1645 conditions per place. [2024-06-27 21:49:45,058 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 0 selfloop transitions, 0 changer transitions 184/184 dead transitions. [2024-06-27 21:49:45,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 184 transitions, 1586 flow [2024-06-27 21:49:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:49:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:49:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 21:49:45,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025862068965517 [2024-06-27 21:49:45,059 INFO L175 Difference]: Start difference. First operand has 161 places, 99 transitions, 1098 flow. Second operand 8 states and 163 transitions. [2024-06-27 21:49:45,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 184 transitions, 1586 flow [2024-06-27 21:49:45,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1267 flow, removed 43 selfloop flow, removed 42 redundant places. [2024-06-27 21:49:45,209 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2024-06-27 21:49:45,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2024-06-27 21:49:45,209 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-27 21:49:45,210 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2024-06-27 21:49:45,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:45,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 5 remaining) [2024-06-27 21:49:45,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 5 remaining) [2024-06-27 21:49:45,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 21:49:45,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 21:49:45,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2024-06-27 21:49:45,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:45,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:45,425 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:45,427 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 21:49:45,427 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 21:49:45,432 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 21:49:45,432 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 21:49:45,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 09:49:45 BasicIcfg [2024-06-27 21:49:45,433 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 21:49:45,434 INFO L158 Benchmark]: Toolchain (without parser) took 13529.32ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 845.2MB). Free memory was 110.6MB in the beginning and 605.6MB in the end (delta: -495.0MB). Peak memory consumption was 395.0MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,434 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 125.8MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:49:45,434 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 21:49:45,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.85ms. Allocated memory is still 169.9MB. Free memory was 110.6MB in the beginning and 131.4MB in the end (delta: -20.8MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,434 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.82ms. Allocated memory is still 169.9MB. Free memory was 131.4MB in the beginning and 129.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,434 INFO L158 Benchmark]: Boogie Preprocessor took 27.49ms. Allocated memory is still 169.9MB. Free memory was 129.4MB in the beginning and 127.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,435 INFO L158 Benchmark]: RCFGBuilder took 674.77ms. Allocated memory is still 169.9MB. Free memory was 127.3MB in the beginning and 109.3MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,435 INFO L158 Benchmark]: TraceAbstraction took 12370.50ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 845.2MB). Free memory was 108.5MB in the beginning and 605.6MB in the end (delta: -497.2MB). Peak memory consumption was 391.0MB. Max. memory is 16.1GB. [2024-06-27 21:49:45,436 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 125.8MB. Free memory is still 96.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.13ms. Allocated memory is still 125.8MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 425.85ms. Allocated memory is still 169.9MB. Free memory was 110.6MB in the beginning and 131.4MB in the end (delta: -20.8MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.82ms. Allocated memory is still 169.9MB. Free memory was 131.4MB in the beginning and 129.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.49ms. Allocated memory is still 169.9MB. Free memory was 129.4MB in the beginning and 127.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 674.77ms. Allocated memory is still 169.9MB. Free memory was 127.3MB in the beginning and 109.3MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 12370.50ms. Allocated memory was 169.9MB in the beginning and 1.0GB in the end (delta: 845.2MB). Free memory was 108.5MB in the beginning and 605.6MB in the end (delta: -497.2MB). Peak memory consumption was 391.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 714]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 715]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 722]: 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, 39 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: 12.3s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1864 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1776 mSDsluCounter, 128 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 99 mSDsCounter, 125 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3425 IncrementalHoareTripleChecker+Invalid, 3550 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 125 mSolverCounterUnsat, 29 mSDtfsCounter, 3425 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2574occurred in iteration=11, InterpolantAutomatonStates: 179, 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, 2.1s InterpolantComputationTime, 508 NumberOfCodeBlocks, 505 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 605 ConstructedInterpolants, 0 QuantifiedInterpolants, 2095 SizeOfPredicates, 26 NumberOfNonLiveVariables, 677 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 23 InterpolantComputations, 9 PerfectInterpolantSequences, 239/495 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 21:49:45,454 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