./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longest-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-longest-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-longest-1.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/triangular-longest-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 21:49:29,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:49:29,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:49:29,811 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:49:29,813 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:49:29,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:49:29,842 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:49:29,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:49:29,843 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:49:29,846 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:49:29,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:49:29,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:49:29,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:49:29,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:49:29,849 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:49:29,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:49:29,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:49:29,850 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:49:29,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:49:29,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:49:29,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:49:29,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:49:29,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:49:29,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:49:29,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:49:29,852 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:49:29,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:49:29,852 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:49:29,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:49:29,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:49:29,854 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:49:29,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:49:29,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:29,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:49:29,866 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:49:29,866 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:49:29,867 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:49:29,867 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:49:29,867 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:49:29,867 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:49:29,867 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:49:29,868 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:49:29,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:49:29,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:49:30,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:49:30,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:49:30,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:49:30,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:49:30,113 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:49:30,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-06-27 21:49:31,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:49:31,343 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:49:31,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-06-27 21:49:31,354 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237a0046e/edc505b1036041a59adce51e9a5541df/FLAGaacc1d59e [2024-06-27 21:49:31,366 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/237a0046e/edc505b1036041a59adce51e9a5541df [2024-06-27 21:49:31,368 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:49:31,368 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:49:31,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/triangular-longest-1.yml/witness.yml [2024-06-27 21:49:31,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:49:31,434 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:49:31,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:31,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:49:31,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:49:31,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:31" (1/2) ... [2024-06-27 21:49:31,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8231dd 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 21:49:31,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:49:31" (1/2) ... [2024-06-27 21:49:31,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f48ccc2 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 21:49:31,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:31" (2/2) ... [2024-06-27 21:49:31,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8231dd 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 21:49:31,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:31" (2/2) ... [2024-06-27 21:49:31,446 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:49:31,463 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:49:31,464 INFO L97 edCorrectnessWitness]: Location invariant before [L715-L715] ! multithreaded || (1LL - (long long )i) + (long long )j >= 0LL [2024-06-27 21:49:31,464 INFO L97 edCorrectnessWitness]: Location invariant before [L714-L714] ! multithreaded || (1LL - (long long )i) + (long long )j >= 0LL [2024-06-27 21:49:31,464 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:49:31,464 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] multithreaded = 1; [2024-06-27 21:49:31,499 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:49:31,768 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-longest-1.i[30962,30975] [2024-06-27 21:49:31,795 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:31,800 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:49:31,868 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-longest-1.i[30962,30975] [2024-06-27 21:49:31,869 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:49:31,898 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:49:31,898 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31 WrapperNode [2024-06-27 21:49:31,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:49:31,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:31,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:49:31,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:49:31,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,929 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,942 INFO L138 Inliner]: procedures = 168, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-06-27 21:49:31,945 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:49:31,946 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:49:31,946 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:49:31,946 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:49:31,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,979 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 21:49:31,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,997 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:31,998 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:32,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:49:32,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:49:32,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:49:32,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:49:32,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (1/1) ... [2024-06-27 21:49:32,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:49:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:32,026 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 21:49:32,044 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 21:49:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 21:49:32,055 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 21:49:32,055 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 21:49:32,056 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 21:49:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:49:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:49:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:49:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:49:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:49:32,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:49:32,057 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 21:49:32,163 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:49:32,165 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:49:32,269 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:49:32,269 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:49:32,337 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:49:32,337 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 21:49:32,337 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:32 BoogieIcfgContainer [2024-06-27 21:49:32,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:49:32,339 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:49:32,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:49:32,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:49:32,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:49:31" (1/4) ... [2024-06-27 21:49:32,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49710bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:49:32, skipping insertion in model container [2024-06-27 21:49:32,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:49:31" (2/4) ... [2024-06-27 21:49:32,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49710bad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:49:32, skipping insertion in model container [2024-06-27 21:49:32,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:49:31" (3/4) ... [2024-06-27 21:49:32,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49710bad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:49:32, skipping insertion in model container [2024-06-27 21:49:32,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:49:32" (4/4) ... [2024-06-27 21:49:32,343 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2024-06-27 21:49:32,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:49:32,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:49:32,360 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:49:32,396 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:49:32,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 66 flow [2024-06-27 21:49:32,453 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2024-06-27 21:49:32,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:32,455 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 21:49:32,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 29 transitions, 66 flow [2024-06-27 21:49:32,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 60 flow [2024-06-27 21:49:32,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:49:32,474 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;@3196139c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:49:32,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:49:32,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:49:32,481 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:49:32,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:49:32,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:32,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:49:32,482 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 21:49:32,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:32,486 INFO L85 PathProgramCache]: Analyzing trace with hash 176651994, now seen corresponding path program 1 times [2024-06-27 21:49:32,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:32,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575969782] [2024-06-27 21:49:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:32,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:32,637 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 21:49:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575969782] [2024-06-27 21:49:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575969782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:32,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:49:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869604537] [2024-06-27 21:49:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:32,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:49:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:32,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:49:32,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:49:32,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 21:49:32,682 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 21:49:32,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:32,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 21:49:32,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:32,788 INFO L124 PetriNetUnfolderBase]: 172/337 cut-off events. [2024-06-27 21:49:32,789 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-06-27 21:49:32,790 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 21:49:32,792 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 23 selfloop transitions, 3 changer transitions 2/37 dead transitions. [2024-06-27 21:49:32,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 139 flow [2024-06-27 21:49:32,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:49:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:49:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-27 21:49:32,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7471264367816092 [2024-06-27 21:49:32,802 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 60 flow. Second operand 3 states and 65 transitions. [2024-06-27 21:49:32,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 139 flow [2024-06-27 21:49:32,804 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 21:49:32,805 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 75 flow [2024-06-27 21:49:32,807 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 21:49:32,809 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-27 21:49:32,810 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 75 flow [2024-06-27 21:49:32,810 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 21:49:32,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:32,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:32,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:49:32,810 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 21:49:32,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1314428841, now seen corresponding path program 1 times [2024-06-27 21:49:32,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:32,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122305724] [2024-06-27 21:49:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:32,872 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 21:49:32,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:32,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122305724] [2024-06-27 21:49:32,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122305724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:32,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:32,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:49:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548345200] [2024-06-27 21:49:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:49:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:49:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:49:32,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-06-27 21:49:32,894 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 21:49:32,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:32,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-06-27 21:49:32,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:32,928 INFO L124 PetriNetUnfolderBase]: 91/268 cut-off events. [2024-06-27 21:49:32,929 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-27 21:49:32,929 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 21:49:32,930 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 15 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2024-06-27 21:49:32,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 99 flow [2024-06-27 21:49:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:49:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:49:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-27 21:49:32,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-06-27 21:49:32,932 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 75 flow. Second operand 3 states and 49 transitions. [2024-06-27 21:49:32,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 99 flow [2024-06-27 21:49:32,932 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 21:49:32,933 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 66 flow [2024-06-27 21:49:32,933 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 21:49:32,934 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-27 21:49:32,934 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 66 flow [2024-06-27 21:49:32,934 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 21:49:32,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:32,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:32,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:49:32,935 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 21:49:32,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 344931938, now seen corresponding path program 1 times [2024-06-27 21:49:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:32,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422992824] [2024-06-27 21:49:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:32,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,088 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 21:49:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422992824] [2024-06-27 21:49:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422992824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:49:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555281764] [2024-06-27 21:49:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:49:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:49:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:49:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-27 21:49:33,114 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 21:49:33,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-27 21:49:33,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:33,250 INFO L124 PetriNetUnfolderBase]: 334/577 cut-off events. [2024-06-27 21:49:33,250 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-06-27 21:49:33,252 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 21:49:33,253 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 31 selfloop transitions, 7 changer transitions 28/71 dead transitions. [2024-06-27 21:49:33,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 71 transitions, 312 flow [2024-06-27 21:49:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:49:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:49:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 21:49:33,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077586206896551 [2024-06-27 21:49:33,255 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 66 flow. Second operand 8 states and 141 transitions. [2024-06-27 21:49:33,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 71 transitions, 312 flow [2024-06-27 21:49:33,256 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 21:49:33,257 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 116 flow [2024-06-27 21:49:33,257 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 21:49:33,258 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-27 21:49:33,258 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 116 flow [2024-06-27 21:49:33,258 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 21:49:33,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:49:33,259 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 21:49:33,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1725427149, now seen corresponding path program 1 times [2024-06-27 21:49:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053740059] [2024-06-27 21:49:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,383 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 21:49:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053740059] [2024-06-27 21:49:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053740059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363949582] [2024-06-27 21:49:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:33,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:33,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-06-27 21:49:33,411 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 21:49:33,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-06-27 21:49:33,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:33,507 INFO L124 PetriNetUnfolderBase]: 253/463 cut-off events. [2024-06-27 21:49:33,507 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-27 21:49:33,508 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 21:49:33,510 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 28 selfloop transitions, 8 changer transitions 15/56 dead transitions. [2024-06-27 21:49:33,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 312 flow [2024-06-27 21:49:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:49:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:49:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 21:49:33,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2024-06-27 21:49:33,512 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 116 flow. Second operand 6 states and 101 transitions. [2024-06-27 21:49:33,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 312 flow [2024-06-27 21:49:33,516 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 21:49:33,517 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 158 flow [2024-06-27 21:49:33,517 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 21:49:33,518 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2024-06-27 21:49:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 158 flow [2024-06-27 21:49:33,518 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 21:49:33,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:33,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:49:33,518 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 21:49:33,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2107222436, now seen corresponding path program 1 times [2024-06-27 21:49:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932848025] [2024-06-27 21:49:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:33,625 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 21:49:33,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:33,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932848025] [2024-06-27 21:49:33,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932848025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:33,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:33,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:33,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107330499] [2024-06-27 21:49:33,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:33,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:33,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:33,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:33,667 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 21:49:33,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:33,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:33,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:33,867 INFO L124 PetriNetUnfolderBase]: 424/760 cut-off events. [2024-06-27 21:49:33,867 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2024-06-27 21:49:33,870 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 21:49:33,875 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 50 selfloop transitions, 11 changer transitions 24/90 dead transitions. [2024-06-27 21:49:33,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 90 transitions, 562 flow [2024-06-27 21:49:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:49:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:49:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 21:49:33,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-06-27 21:49:33,881 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 158 flow. Second operand 10 states and 152 transitions. [2024-06-27 21:49:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 90 transitions, 562 flow [2024-06-27 21:49:33,888 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 21:49:33,890 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 235 flow [2024-06-27 21:49:33,890 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 21:49:33,894 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-27 21:49:33,895 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 235 flow [2024-06-27 21:49:33,895 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 21:49:33,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:33,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:33,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:49:33,897 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 21:49:33,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1447649696, now seen corresponding path program 2 times [2024-06-27 21:49:33,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:33,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979333644] [2024-06-27 21:49:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:33,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,037 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 21:49:34,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979333644] [2024-06-27 21:49:34,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979333644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:34,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:34,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:49:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037415915] [2024-06-27 21:49:34,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:49:34,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:49:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:49:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:34,063 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 21:49:34,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:34,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,202 INFO L124 PetriNetUnfolderBase]: 370/685 cut-off events. [2024-06-27 21:49:34,202 INFO L125 PetriNetUnfolderBase]: For 2517/2517 co-relation queries the response was YES. [2024-06-27 21:49:34,204 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 21:49:34,206 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 41 selfloop transitions, 13 changer transitions 27/86 dead transitions. [2024-06-27 21:49:34,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 658 flow [2024-06-27 21:49:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:49:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:49:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-27 21:49:34,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095785440613027 [2024-06-27 21:49:34,208 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 235 flow. Second operand 9 states and 133 transitions. [2024-06-27 21:49:34,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 658 flow [2024-06-27 21:49:34,213 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 21:49:34,214 INFO L231 Difference]: Finished difference. Result has 62 places, 42 transitions, 314 flow [2024-06-27 21:49:34,215 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 21:49:34,217 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-06-27 21:49:34,217 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 42 transitions, 314 flow [2024-06-27 21:49:34,217 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 21:49:34,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,217 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 21:49:34,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:49:34,218 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 21:49:34,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash -601290451, now seen corresponding path program 1 times [2024-06-27 21:49:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155298280] [2024-06-27 21:49:34,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:34,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155298280] [2024-06-27 21:49:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155298280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:49:34,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:49:34,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:49:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150418870] [2024-06-27 21:49:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:49:34,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:49:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:49:34,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:34,358 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 21:49:34,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:34,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:34,553 INFO L124 PetriNetUnfolderBase]: 460/842 cut-off events. [2024-06-27 21:49:34,553 INFO L125 PetriNetUnfolderBase]: For 3615/3615 co-relation queries the response was YES. [2024-06-27 21:49:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999 conditions, 842 events. 460/842 cut-off events. For 3615/3615 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3748 event pairs, 64 based on Foata normal form. 27/856 useless extension candidates. Maximal degree in co-relation 2971. Up to 193 conditions per place. [2024-06-27 21:49:34,557 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 44 selfloop transitions, 24 changer transitions 30/103 dead transitions. [2024-06-27 21:49:34,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 834 flow [2024-06-27 21:49:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:49:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:49:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-06-27 21:49:34,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-06-27 21:49:34,559 INFO L175 Difference]: Start difference. First operand has 62 places, 42 transitions, 314 flow. Second operand 11 states and 161 transitions. [2024-06-27 21:49:34,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 834 flow [2024-06-27 21:49:34,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 807 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:49:34,569 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 454 flow [2024-06-27 21:49:34,569 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=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=454, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2024-06-27 21:49:34,570 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-27 21:49:34,570 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 454 flow [2024-06-27 21:49:34,571 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 21:49:34,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:34,571 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 21:49:34,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:49:34,571 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 21:49:34,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1394776231, now seen corresponding path program 1 times [2024-06-27 21:49:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:34,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133212129] [2024-06-27 21:49:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,683 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 21:49:34,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133212129] [2024-06-27 21:49:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133212129] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290018805] [2024-06-27 21:49:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:34,691 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 21:49:34,712 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 21:49:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:34,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 21:49:34,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:34,817 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 21:49:34,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:34,952 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 21:49:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290018805] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:34,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:34,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-06-27 21:49:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138989042] [2024-06-27 21:49:34,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 21:49:34,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:34,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 21:49:34,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 21:49:34,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:34,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 454 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 21:49:34,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:34,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:34,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:35,457 INFO L124 PetriNetUnfolderBase]: 838/1521 cut-off events. [2024-06-27 21:49:35,458 INFO L125 PetriNetUnfolderBase]: For 15031/15031 co-relation queries the response was YES. [2024-06-27 21:49:35,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6863 conditions, 1521 events. 838/1521 cut-off events. For 15031/15031 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7183 event pairs, 74 based on Foata normal form. 72/1586 useless extension candidates. Maximal degree in co-relation 6830. Up to 355 conditions per place. [2024-06-27 21:49:35,466 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 89 selfloop transitions, 41 changer transitions 80/215 dead transitions. [2024-06-27 21:49:35,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 215 transitions, 2129 flow [2024-06-27 21:49:35,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 21:49:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 21:49:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 390 transitions. [2024-06-27 21:49:35,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49808429118773945 [2024-06-27 21:49:35,468 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 454 flow. Second operand 27 states and 390 transitions. [2024-06-27 21:49:35,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 215 transitions, 2129 flow [2024-06-27 21:49:35,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 215 transitions, 1924 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-27 21:49:35,487 INFO L231 Difference]: Finished difference. Result has 107 places, 66 transitions, 850 flow [2024-06-27 21:49:35,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=850, PETRI_PLACES=107, PETRI_TRANSITIONS=66} [2024-06-27 21:49:35,489 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 76 predicate places. [2024-06-27 21:49:35,489 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 66 transitions, 850 flow [2024-06-27 21:49:35,490 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 21:49:35,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:35,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:35,515 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 21:49:35,702 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 21:49:35,704 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 21:49:35,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash 227189816, now seen corresponding path program 1 times [2024-06-27 21:49:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:35,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680841940] [2024-06-27 21:49:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680841940] [2024-06-27 21:49:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680841940] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660232652] [2024-06-27 21:49:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:35,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:35,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:35,829 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 21:49:35,852 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 21:49:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:35,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 21:49:35,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:35,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660232652] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:36,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:36,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-06-27 21:49:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522315503] [2024-06-27 21:49:36,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-27 21:49:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-27 21:49:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-06-27 21:49:36,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:36,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 66 transitions, 850 flow. Second operand has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:36,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:36,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:36,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:36,690 INFO L124 PetriNetUnfolderBase]: 1180/2170 cut-off events. [2024-06-27 21:49:36,691 INFO L125 PetriNetUnfolderBase]: For 73645/73645 co-relation queries the response was YES. [2024-06-27 21:49:36,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13836 conditions, 2170 events. 1180/2170 cut-off events. For 73645/73645 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 10863 event pairs, 52 based on Foata normal form. 108/2265 useless extension candidates. Maximal degree in co-relation 13788. Up to 511 conditions per place. [2024-06-27 21:49:36,706 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 102 selfloop transitions, 65 changer transitions 97/269 dead transitions. [2024-06-27 21:49:36,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 269 transitions, 4139 flow [2024-06-27 21:49:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 21:49:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 21:49:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 447 transitions. [2024-06-27 21:49:36,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972191323692992 [2024-06-27 21:49:36,710 INFO L175 Difference]: Start difference. First operand has 107 places, 66 transitions, 850 flow. Second operand 31 states and 447 transitions. [2024-06-27 21:49:36,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 269 transitions, 4139 flow [2024-06-27 21:49:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 269 transitions, 3293 flow, removed 409 selfloop flow, removed 13 redundant places. [2024-06-27 21:49:36,767 INFO L231 Difference]: Finished difference. Result has 139 places, 90 transitions, 1448 flow [2024-06-27 21:49:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1448, PETRI_PLACES=139, PETRI_TRANSITIONS=90} [2024-06-27 21:49:36,768 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-27 21:49:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 90 transitions, 1448 flow [2024-06-27 21:49:36,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:36,768 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:36,784 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 21:49:36,980 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 21:49:36,980 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 21:49:36,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash 479994769, now seen corresponding path program 2 times [2024-06-27 21:49:36,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307932526] [2024-06-27 21:49:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:37,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307932526] [2024-06-27 21:49:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307932526] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566265622] [2024-06-27 21:49:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:49:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:37,121 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 21:49:37,140 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 21:49:37,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:49:37,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:37,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-27 21:49:37,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:37,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:49:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566265622] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:37,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:37,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-06-27 21:49:37,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913372821] [2024-06-27 21:49:37,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:37,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 21:49:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 21:49:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-06-27 21:49:37,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:37,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 90 transitions, 1448 flow. Second operand has 21 states, 21 states have (on average 9.19047619047619) internal successors, (193), 21 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:37,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:37,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:37,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:38,665 INFO L124 PetriNetUnfolderBase]: 1828/3335 cut-off events. [2024-06-27 21:49:38,665 INFO L125 PetriNetUnfolderBase]: For 208378/208378 co-relation queries the response was YES. [2024-06-27 21:49:38,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25795 conditions, 3335 events. 1828/3335 cut-off events. For 208378/208378 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 17712 event pairs, 58 based on Foata normal form. 171/3499 useless extension candidates. Maximal degree in co-relation 25732. Up to 775 conditions per place. [2024-06-27 21:49:38,696 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 139 selfloop transitions, 108 changer transitions 149/401 dead transitions. [2024-06-27 21:49:38,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 401 transitions, 7880 flow [2024-06-27 21:49:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 21:49:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 21:49:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 644 transitions. [2024-06-27 21:49:38,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934865900383142 [2024-06-27 21:49:38,700 INFO L175 Difference]: Start difference. First operand has 139 places, 90 transitions, 1448 flow. Second operand 45 states and 644 transitions. [2024-06-27 21:49:38,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 401 transitions, 7880 flow [2024-06-27 21:49:38,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 401 transitions, 6085 flow, removed 870 selfloop flow, removed 19 redundant places. [2024-06-27 21:49:38,874 INFO L231 Difference]: Finished difference. Result has 183 places, 136 transitions, 2470 flow [2024-06-27 21:49:38,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2470, PETRI_PLACES=183, PETRI_TRANSITIONS=136} [2024-06-27 21:49:38,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 152 predicate places. [2024-06-27 21:49:38,876 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 136 transitions, 2470 flow [2024-06-27 21:49:38,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.19047619047619) internal successors, (193), 21 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:38,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:38,876 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:38,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-06-27 21:49:39,087 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 21:49:39,088 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 21:49:39,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1162526035, now seen corresponding path program 3 times [2024-06-27 21:49:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:39,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066748991] [2024-06-27 21:49:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:39,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:39,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066748991] [2024-06-27 21:49:39,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066748991] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139138772] [2024-06-27 21:49:39,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:49:39,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:39,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:39,316 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 21:49:39,318 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 21:49:39,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-27 21:49:39,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:39,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 21:49:39,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:39,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:49:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139138772] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:39,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2024-06-27 21:49:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050478131] [2024-06-27 21:49:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 21:49:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 21:49:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2024-06-27 21:49:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 136 transitions, 2470 flow. Second operand has 29 states, 29 states have (on average 9.275862068965518) internal successors, (269), 29 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:39,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:39,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:41,712 INFO L124 PetriNetUnfolderBase]: 3160/5689 cut-off events. [2024-06-27 21:49:41,712 INFO L125 PetriNetUnfolderBase]: For 535806/535806 co-relation queries the response was YES. [2024-06-27 21:49:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50083 conditions, 5689 events. 3160/5689 cut-off events. For 535806/535806 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 30543 event pairs, 94 based on Foata normal form. 117/5793 useless extension candidates. Maximal degree in co-relation 50004. Up to 1294 conditions per place. [2024-06-27 21:49:41,775 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 192 selfloop transitions, 196 changer transitions 176/569 dead transitions. [2024-06-27 21:49:41,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 569 transitions, 13678 flow [2024-06-27 21:49:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-06-27 21:49:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-06-27 21:49:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 843 transitions. [2024-06-27 21:49:41,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49269433080070135 [2024-06-27 21:49:41,777 INFO L175 Difference]: Start difference. First operand has 183 places, 136 transitions, 2470 flow. Second operand 59 states and 843 transitions. [2024-06-27 21:49:41,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 569 transitions, 13678 flow [2024-06-27 21:49:42,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 569 transitions, 10709 flow, removed 1450 selfloop flow, removed 25 redundant places. [2024-06-27 21:49:42,249 INFO L231 Difference]: Finished difference. Result has 246 places, 232 transitions, 5057 flow [2024-06-27 21:49:42,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=5057, PETRI_PLACES=246, PETRI_TRANSITIONS=232} [2024-06-27 21:49:42,250 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2024-06-27 21:49:42,250 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 232 transitions, 5057 flow [2024-06-27 21:49:42,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.275862068965518) internal successors, (269), 29 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:42,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:42,251 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:42,268 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 21:49:42,468 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 21:49:42,469 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 21:49:42,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1178611264, now seen corresponding path program 4 times [2024-06-27 21:49:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969706745] [2024-06-27 21:49:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:42,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969706745] [2024-06-27 21:49:42,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969706745] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023722325] [2024-06-27 21:49:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:49:42,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:42,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:42,951 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 21:49:42,953 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 21:49:43,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:49:43,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:43,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 21:49:43,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:43,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:43,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023722325] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:43,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:43,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-06-27 21:49:43,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130099716] [2024-06-27 21:49:43,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:43,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-06-27 21:49:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-06-27 21:49:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=1838, Unknown=0, NotChecked=0, Total=2352 [2024-06-27 21:49:43,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:43,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 232 transitions, 5057 flow. Second operand has 49 states, 49 states have (on average 9.142857142857142) internal successors, (448), 49 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:43,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:43,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:47,639 INFO L124 PetriNetUnfolderBase]: 4294/8185 cut-off events. [2024-06-27 21:49:47,640 INFO L125 PetriNetUnfolderBase]: For 1394642/1394642 co-relation queries the response was YES. [2024-06-27 21:49:47,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91195 conditions, 8185 events. 4294/8185 cut-off events. For 1394642/1394642 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 47507 event pairs, 1080 based on Foata normal form. 225/8403 useless extension candidates. Maximal degree in co-relation 91089. Up to 3952 conditions per place. [2024-06-27 21:49:47,728 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 351 selfloop transitions, 146 changer transitions 279/781 dead transitions. [2024-06-27 21:49:47,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 781 transitions, 24426 flow [2024-06-27 21:49:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-06-27 21:49:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2024-06-27 21:49:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 1109 transitions. [2024-06-27 21:49:47,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47801724137931034 [2024-06-27 21:49:47,820 INFO L175 Difference]: Start difference. First operand has 246 places, 232 transitions, 5057 flow. Second operand 80 states and 1109 transitions. [2024-06-27 21:49:47,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 781 transitions, 24426 flow [2024-06-27 21:49:51,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 781 transitions, 19279 flow, removed 2482 selfloop flow, removed 33 redundant places. [2024-06-27 21:49:51,307 INFO L231 Difference]: Finished difference. Result has 328 places, 334 transitions, 7899 flow [2024-06-27 21:49:51,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=7899, PETRI_PLACES=328, PETRI_TRANSITIONS=334} [2024-06-27 21:49:51,307 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 297 predicate places. [2024-06-27 21:49:51,308 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 334 transitions, 7899 flow [2024-06-27 21:49:51,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.142857142857142) internal successors, (448), 49 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:51,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:49:51,308 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:49:51,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 21:49:51,510 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 21:49:51,511 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 21:49:51,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:49:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 280987434, now seen corresponding path program 5 times [2024-06-27 21:49:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:49:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338234531] [2024-06-27 21:49:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:49:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:49:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:49:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:49:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338234531] [2024-06-27 21:49:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338234531] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:49:51,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441442386] [2024-06-27 21:49:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:49:51,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:49:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:49:51,931 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 21:49:51,948 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 21:49:51,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-06-27 21:49:51,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:49:51,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 21:49:51,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:49:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:52,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:49:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:49:52,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441442386] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:49:52,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:49:52,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-06-27 21:49:52,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507214852] [2024-06-27 21:49:52,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:49:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-06-27 21:49:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:49:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-06-27 21:49:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=1916, Unknown=0, NotChecked=0, Total=2352 [2024-06-27 21:49:52,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:49:52,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 334 transitions, 7899 flow. Second operand has 49 states, 49 states have (on average 9.142857142857142) internal successors, (448), 49 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:49:52,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:49:52,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:49:52,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:49:58,105 INFO L124 PetriNetUnfolderBase]: 5698/11300 cut-off events. [2024-06-27 21:49:58,105 INFO L125 PetriNetUnfolderBase]: For 3419148/3419148 co-relation queries the response was YES. [2024-06-27 21:49:58,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149159 conditions, 11300 events. 5698/11300 cut-off events. For 3419148/3419148 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 72409 event pairs, 404 based on Foata normal form. 225/11518 useless extension candidates. Maximal degree in co-relation 149020. Up to 2956 conditions per place. [2024-06-27 21:49:58,232 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 286 selfloop transitions, 394 changer transitions 295/980 dead transitions. [2024-06-27 21:49:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 980 transitions, 33667 flow [2024-06-27 21:49:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-06-27 21:49:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-06-27 21:49:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1229 transitions. [2024-06-27 21:49:58,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815830721003135 [2024-06-27 21:49:58,237 INFO L175 Difference]: Start difference. First operand has 328 places, 334 transitions, 7899 flow. Second operand 88 states and 1229 transitions. [2024-06-27 21:49:58,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 980 transitions, 33667 flow [2024-06-27 21:50:15,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 980 transitions, 28578 flow, removed 2516 selfloop flow, removed 39 redundant places. [2024-06-27 21:50:15,612 INFO L231 Difference]: Finished difference. Result has 404 places, 483 transitions, 13022 flow [2024-06-27 21:50:15,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6226, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=13022, PETRI_PLACES=404, PETRI_TRANSITIONS=483} [2024-06-27 21:50:15,613 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 373 predicate places. [2024-06-27 21:50:15,613 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 483 transitions, 13022 flow [2024-06-27 21:50:15,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 9.142857142857142) internal successors, (448), 49 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:15,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:50:15,614 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:50:15,627 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 21:50:15,814 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 21:50:15,817 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:50:15,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:50:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1169867426, now seen corresponding path program 6 times [2024-06-27 21:50:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:50:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964354371] [2024-06-27 21:50:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:50:15,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:50:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:50:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:50:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:50:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964354371] [2024-06-27 21:50:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964354371] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:50:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733075501] [2024-06-27 21:50:16,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:50:16,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:50:16,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:50:16,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:50:16,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 21:50:16,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-06-27 21:50:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:50:16,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjunts are in the unsatisfiable core [2024-06-27 21:50:16,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:50:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:50:16,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:50:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 21:50:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733075501] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:50:16,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:50:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-06-27 21:50:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528994617] [2024-06-27 21:50:16,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:50:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-06-27 21:50:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:50:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-06-27 21:50:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2024-06-27 21:50:16,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:50:16,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 483 transitions, 13022 flow. Second operand has 50 states, 50 states have (on average 9.16) internal successors, (458), 50 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:50:16,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:50:16,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:50:16,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:50:24,873 INFO L124 PetriNetUnfolderBase]: 7984/15723 cut-off events. [2024-06-27 21:50:24,873 INFO L125 PetriNetUnfolderBase]: For 6862030/6862030 co-relation queries the response was YES. [2024-06-27 21:50:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236780 conditions, 15723 events. 7984/15723 cut-off events. For 6862030/6862030 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 107675 event pairs, 92 based on Foata normal form. 234/15950 useless extension candidates. Maximal degree in co-relation 236612. Up to 4063 conditions per place. [2024-06-27 21:50:25,089 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 289 selfloop transitions, 637 changer transitions 330/1261 dead transitions. [2024-06-27 21:50:25,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1261 transitions, 49153 flow [2024-06-27 21:50:25,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-06-27 21:50:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2024-06-27 21:50:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 1469 transitions. [2024-06-27 21:50:25,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-06-27 21:50:25,099 INFO L175 Difference]: Start difference. First operand has 404 places, 483 transitions, 13022 flow. Second operand 104 states and 1469 transitions. [2024-06-27 21:50:25,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1261 transitions, 49153 flow [2024-06-27 21:51:03,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1261 transitions, 41771 flow, removed 3639 selfloop flow, removed 41 redundant places. [2024-06-27 21:51:03,874 INFO L231 Difference]: Finished difference. Result has 505 places, 669 transitions, 20030 flow [2024-06-27 21:51:03,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=20030, PETRI_PLACES=505, PETRI_TRANSITIONS=669} [2024-06-27 21:51:03,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 474 predicate places. [2024-06-27 21:51:03,875 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 669 transitions, 20030 flow [2024-06-27 21:51:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 9.16) internal successors, (458), 50 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:03,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:51:03,876 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:51:03,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-06-27 21:51:04,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:51:04,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:51:04,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:51:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -731949815, now seen corresponding path program 7 times [2024-06-27 21:51:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:51:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021580531] [2024-06-27 21:51:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:51:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:51:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:51:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021580531] [2024-06-27 21:51:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021580531] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:51:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292244975] [2024-06-27 21:51:04,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:51:04,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:51:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:51:04,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:51:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 21:51:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:51:04,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2024-06-27 21:51:04,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:51:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:04,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:51:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:51:05,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292244975] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:51:05,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:51:05,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-06-27 21:51:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369018629] [2024-06-27 21:51:05,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:51:05,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-06-27 21:51:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:51:05,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-06-27 21:51:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1673, Unknown=0, NotChecked=0, Total=2162 [2024-06-27 21:51:05,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:51:05,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 669 transitions, 20030 flow. Second operand has 47 states, 47 states have (on average 9.127659574468085) internal successors, (429), 47 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:51:05,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:51:05,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:51:05,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:51:16,050 INFO L124 PetriNetUnfolderBase]: 9406/18662 cut-off events. [2024-06-27 21:51:16,051 INFO L125 PetriNetUnfolderBase]: For 12627845/12627845 co-relation queries the response was YES. [2024-06-27 21:51:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336026 conditions, 18662 events. 9406/18662 cut-off events. For 12627845/12627845 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 127548 event pairs, 118 based on Foata normal form. 153/18802 useless extension candidates. Maximal degree in co-relation 335818. Up to 4699 conditions per place. [2024-06-27 21:51:16,493 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 349 selfloop transitions, 751 changer transitions 273/1378 dead transitions. [2024-06-27 21:51:16,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1378 transitions, 64509 flow [2024-06-27 21:51:16,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-06-27 21:51:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-06-27 21:51:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1437 transitions. [2024-06-27 21:51:16,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906111300785251 [2024-06-27 21:51:16,496 INFO L175 Difference]: Start difference. First operand has 505 places, 669 transitions, 20030 flow. Second operand 101 states and 1437 transitions. [2024-06-27 21:51:16,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1378 transitions, 64509 flow [2024-06-27 21:52:05,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1378 transitions, 48691 flow, removed 7811 selfloop flow, removed 48 redundant places. [2024-06-27 21:52:05,273 INFO L231 Difference]: Finished difference. Result has 580 places, 799 transitions, 24475 flow [2024-06-27 21:52:05,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15134, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=24475, PETRI_PLACES=580, PETRI_TRANSITIONS=799} [2024-06-27 21:52:05,273 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 549 predicate places. [2024-06-27 21:52:05,274 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 799 transitions, 24475 flow [2024-06-27 21:52:05,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 9.127659574468085) internal successors, (429), 47 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:05,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:52:05,274 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:52:05,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 21:52:05,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 21:52:05,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:52:05,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:52:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2099001389, now seen corresponding path program 8 times [2024-06-27 21:52:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:52:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497936881] [2024-06-27 21:52:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:52:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:52:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:52:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:52:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497936881] [2024-06-27 21:52:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497936881] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:52:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429677062] [2024-06-27 21:52:06,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:52:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:52:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:52:06,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:52:06,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 21:52:06,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:52:06,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:52:06,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2024-06-27 21:52:06,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:52:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:06,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:52:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:52:06,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429677062] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:52:06,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:52:06,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 49 [2024-06-27 21:52:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603100871] [2024-06-27 21:52:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:52:06,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-06-27 21:52:06,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:52:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-06-27 21:52:06,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2024-06-27 21:52:07,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-27 21:52:07,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 799 transitions, 24475 flow. Second operand has 50 states, 50 states have (on average 9.14) internal successors, (457), 50 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:52:07,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:52:07,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-27 21:52:07,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:52:19,238 INFO L124 PetriNetUnfolderBase]: 9892/19542 cut-off events. [2024-06-27 21:52:19,238 INFO L125 PetriNetUnfolderBase]: For 14715804/14715804 co-relation queries the response was YES. [2024-06-27 21:52:19,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353470 conditions, 19542 events. 9892/19542 cut-off events. For 14715804/14715804 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 133388 event pairs, 46 based on Foata normal form. 108/19643 useless extension candidates. Maximal degree in co-relation 353240. Up to 4837 conditions per place. [2024-06-27 21:52:19,594 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 347 selfloop transitions, 812 changer transitions 231/1395 dead transitions. [2024-06-27 21:52:19,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1395 transitions, 58540 flow [2024-06-27 21:52:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-06-27 21:52:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2024-06-27 21:52:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1383 transitions. [2024-06-27 21:52:19,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48662913441238564 [2024-06-27 21:52:19,597 INFO L175 Difference]: Start difference. First operand has 580 places, 799 transitions, 24475 flow. Second operand 98 states and 1383 transitions. [2024-06-27 21:52:19,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1395 transitions, 58540 flow [2024-06-27 21:53:20,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 1395 transitions, 46950 flow, removed 5667 selfloop flow, removed 38 redundant places. [2024-06-27 21:53:20,556 INFO L231 Difference]: Finished difference. Result has 639 places, 847 transitions, 23510 flow [2024-06-27 21:53:20,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19157, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=23510, PETRI_PLACES=639, PETRI_TRANSITIONS=847} [2024-06-27 21:53:20,557 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 608 predicate places. [2024-06-27 21:53:20,557 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 847 transitions, 23510 flow [2024-06-27 21:53:20,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 9.14) internal successors, (457), 50 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:20,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:53:20,558 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:53:20,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 21:53:20,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 21:53:20,761 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:53:20,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:53:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2141545195, now seen corresponding path program 9 times [2024-06-27 21:53:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:53:20,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219775106] [2024-06-27 21:53:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:53:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:53:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:53:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1081 proven. 77 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:53:21,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:53:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219775106] [2024-06-27 21:53:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219775106] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:53:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651817853] [2024-06-27 21:53:21,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:53:21,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:53:21,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:53:21,046 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:53:21,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 21:53:21,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-06-27 21:53:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:53:21,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 22 conjunts are in the unsatisfiable core [2024-06-27 21:53:21,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:53:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1158 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:53:21,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:53:21,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651817853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:53:21,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:53:21,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-06-27 21:53:21,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663471067] [2024-06-27 21:53:21,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:53:21,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-27 21:53:21,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:53:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-27 21:53:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-06-27 21:53:21,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 29 [2024-06-27 21:53:21,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 847 transitions, 23510 flow. Second operand has 23 states, 23 states have (on average 16.956521739130434) internal successors, (390), 23 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:53:21,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:53:21,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 29 [2024-06-27 21:53:21,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand