./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.2024-05-07_14-17-48.files/protection/triangular-longest-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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.2024-05-07_14-17-48.files/protection/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-wip.fs.witness-ghost-b44c828-m [2024-05-12 12:37:46,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:37:46,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:37:46,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:37:46,163 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:37:46,189 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:37:46,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:37:46,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:37:46,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:37:46,193 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:37:46,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:37:46,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:37:46,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:37:46,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:37:46,195 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:37:46,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:37:46,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:37:46,196 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:37:46,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:37:46,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:37:46,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:37:46,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:37:46,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:37:46,198 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:37:46,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:37:46,198 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:37:46,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:37:46,199 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:37:46,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:37:46,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:37:46,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:37:46,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:37:46,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:37:46,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:37:46,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:37:46,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:37:46,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:37:46,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:37:46,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:37:46,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:37:46,202 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:37:46,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:37:46,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:37:46,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:37:46,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:37:46,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:37:46,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:37:46,451 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:37:46,451 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:37:46,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/triangular-longest-1.yml/witness.yml [2024-05-12 12:37:46,560 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:37:46,560 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:37:46,562 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-05-12 12:37:47,676 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:37:47,870 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:37:47,870 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2024-05-12 12:37:47,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82cdfd63a/c478c722653543338be8264af92ebb05/FLAG04e0aeaa5 [2024-05-12 12:37:47,901 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82cdfd63a/c478c722653543338be8264af92ebb05 [2024-05-12 12:37:47,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:37:47,903 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:37:47,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:37:47,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:37:47,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:37:47,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/2) ... [2024-05-12 12:37:47,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7982890e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:37:47, skipping insertion in model container [2024-05-12 12:37:47,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/2) ... [2024-05-12 12:37:47,914 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e8d8b48 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:37:47, skipping insertion in model container [2024-05-12 12:37:47,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:37:47" (2/2) ... [2024-05-12 12:37:47,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7982890e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:47, skipping insertion in model container [2024-05-12 12:37:47,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:37:47" (2/2) ... [2024-05-12 12:37:47,916 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:37:47,941 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:37:47,942 INFO L97 edCorrectnessWitness]: Location invariant before [L714-L714] (! multithreaded || (4 <= j && j % 2 == 0)) && (! multithreaded || (3 <= i && i % 2 == 1)) [2024-05-12 12:37:47,942 INFO L97 edCorrectnessWitness]: Location invariant before [L715-L715] (! multithreaded || (4 <= j && j % 2 == 0)) && (! multithreaded || (3 <= i && i % 2 == 1)) [2024-05-12 12:37:47,942 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:37:47,943 INFO L106 edCorrectnessWitness]: ghost_update [L713-L713] multithreaded = 1; [2024-05-12 12:37:47,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:37:48,238 WARN L246 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] [2024-05-12 12:37:48,241 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:37:48,252 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:37:48,325 WARN L246 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] [2024-05-12 12:37:48,332 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:37:48,359 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:37:48,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48 WrapperNode [2024-05-12 12:37:48,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:37:48,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:37:48,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:37:48,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:37:48,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,390 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2024-05-12 12:37:48,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:37:48,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:37:48,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:37:48,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:37:48,399 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,402 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,412 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 12:37:48,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,417 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,421 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,421 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:37:48,424 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:37:48,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:37:48,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:37:48,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (1/1) ... [2024-05-12 12:37:48,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:37:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:48,451 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) [2024-05-12 12:37:48,469 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 [2024-05-12 12:37:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-05-12 12:37:48,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-05-12 12:37:48,481 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-05-12 12:37:48,481 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-05-12 12:37:48,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:37:48,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:37:48,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:37:48,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:37:48,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 12:37:48,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:37:48,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:37:48,484 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:37:48,571 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:37:48,573 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:37:48,806 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:37:48,806 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:37:48,911 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:37:48,911 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 12:37:48,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:37:48 BoogieIcfgContainer [2024-05-12 12:37:48,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:37:48,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:37:48,913 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:37:48,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:37:48,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:37:46" (1/4) ... [2024-05-12 12:37:48,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59313d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:37:47" (2/4) ... [2024-05-12 12:37:48,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59313d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:37:48" (3/4) ... [2024-05-12 12:37:48,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a59313d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:37:48, skipping insertion in model container [2024-05-12 12:37:48,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:37:48" (4/4) ... [2024-05-12 12:37:48,920 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2024-05-12 12:37:48,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:37:48,932 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 12:37:48,933 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:37:48,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 12:37:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 30 transitions, 68 flow [2024-05-12 12:37:49,021 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2024-05-12 12:37:49,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:37:49,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 3/28 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. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-05-12 12:37:49,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 30 transitions, 68 flow [2024-05-12 12:37:49,027 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 28 transitions, 62 flow [2024-05-12 12:37:49,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:37:49,048 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;@5b315b21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:37:49,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 12:37:49,056 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:37:49,056 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 12:37:49,056 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:37:49,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:49,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 12:37:49,058 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)] === [2024-05-12 12:37:49,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1410544718, now seen corresponding path program 1 times [2024-05-12 12:37:49,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:49,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20948571] [2024-05-12 12:37:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20948571] [2024-05-12 12:37:49,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20948571] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:49,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:49,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:37:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719699077] [2024-05-12 12:37:49,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:37:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:37:49,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:37:49,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-05-12 12:37:49,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:49,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:49,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-05-12 12:37:49,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:49,715 INFO L124 PetriNetUnfolderBase]: 172/327 cut-off events. [2024-05-12 12:37:49,716 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-05-12 12:37:49,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 327 events. 172/327 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1306 event pairs, 54 based on Foata normal form. 20/327 useless extension candidates. Maximal degree in co-relation 614. Up to 211 conditions per place. [2024-05-12 12:37:49,721 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 25 selfloop transitions, 3 changer transitions 2/38 dead transitions. [2024-05-12 12:37:49,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 38 transitions, 145 flow [2024-05-12 12:37:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:37:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:37:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-05-12 12:37:49,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-05-12 12:37:49,732 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 62 flow. Second operand 3 states and 64 transitions. [2024-05-12 12:37:49,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 38 transitions, 145 flow [2024-05-12 12:37:49,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:49,736 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 77 flow [2024-05-12 12:37:49,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-05-12 12:37:49,742 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2024-05-12 12:37:49,743 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 77 flow [2024-05-12 12:37:49,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:49,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:49,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:49,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:37:49,744 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)] === [2024-05-12 12:37:49,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:49,745 INFO L85 PathProgramCache]: Analyzing trace with hash -421416505, now seen corresponding path program 1 times [2024-05-12 12:37:49,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:49,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335443739] [2024-05-12 12:37:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335443739] [2024-05-12 12:37:50,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335443739] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:37:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058920614] [2024-05-12 12:37:50,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:37:50,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:37:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:37:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-05-12 12:37:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-05-12 12:37:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,235 INFO L124 PetriNetUnfolderBase]: 160/318 cut-off events. [2024-05-12 12:37:50,236 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-05-12 12:37:50,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 318 events. 160/318 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1260 event pairs, 37 based on Foata normal form. 21/335 useless extension candidates. Maximal degree in co-relation 683. Up to 103 conditions per place. [2024-05-12 12:37:50,242 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 36 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-05-12 12:37:50,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 205 flow [2024-05-12 12:37:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-05-12 12:37:50,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-05-12 12:37:50,245 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 77 flow. Second operand 5 states and 93 transitions. [2024-05-12 12:37:50,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 205 flow [2024-05-12 12:37:50,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:37:50,250 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 91 flow [2024-05-12 12:37:50,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-05-12 12:37:50,251 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2024-05-12 12:37:50,252 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 91 flow [2024-05-12 12:37:50,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:50,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:50,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:37:50,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:37:50,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash 280436029, now seen corresponding path program 1 times [2024-05-12 12:37:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285598156] [2024-05-12 12:37:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:50,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:50,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285598156] [2024-05-12 12:37:50,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285598156] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:37:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368547931] [2024-05-12 12:37:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:37:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:37:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:37:50,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-05-12 12:37:50,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:50,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-05-12 12:37:50,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,498 INFO L124 PetriNetUnfolderBase]: 244/492 cut-off events. [2024-05-12 12:37:50,498 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-05-12 12:37:50,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076 conditions, 492 events. 244/492 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2275 event pairs, 88 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1058. Up to 255 conditions per place. [2024-05-12 12:37:50,501 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 27 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-05-12 12:37:50,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 175 flow [2024-05-12 12:37:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:37:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:37:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2024-05-12 12:37:50,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 12:37:50,502 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 91 flow. Second operand 5 states and 75 transitions. [2024-05-12 12:37:50,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 175 flow [2024-05-12 12:37:50,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 169 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:50,504 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 94 flow [2024-05-12 12:37:50,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-05-12 12:37:50,505 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2024-05-12 12:37:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 94 flow [2024-05-12 12:37:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:50,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:37:50,506 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)] === [2024-05-12 12:37:50,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash 77939701, now seen corresponding path program 1 times [2024-05-12 12:37:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107483670] [2024-05-12 12:37:50,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:50,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107483670] [2024-05-12 12:37:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107483670] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:37:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821437595] [2024-05-12 12:37:50,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:37:50,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:37:50,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:37:50,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:50,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:50,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:50,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,711 INFO L124 PetriNetUnfolderBase]: 532/925 cut-off events. [2024-05-12 12:37:50,711 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2024-05-12 12:37:50,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2221 conditions, 925 events. 532/925 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4200 event pairs, 136 based on Foata normal form. 0/890 useless extension candidates. Maximal degree in co-relation 2202. Up to 397 conditions per place. [2024-05-12 12:37:50,714 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 31 selfloop transitions, 6 changer transitions 23/64 dead transitions. [2024-05-12 12:37:50,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 339 flow [2024-05-12 12:37:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:37:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:37:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-05-12 12:37:50,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-05-12 12:37:50,718 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 94 flow. Second operand 6 states and 102 transitions. [2024-05-12 12:37:50,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 339 flow [2024-05-12 12:37:50,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:37:50,722 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 129 flow [2024-05-12 12:37:50,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2024-05-12 12:37:50,723 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2024-05-12 12:37:50,723 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 129 flow [2024-05-12 12:37:50,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:50,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:50,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:37:50,725 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)] === [2024-05-12 12:37:50,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2024798661, now seen corresponding path program 1 times [2024-05-12 12:37:50,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:50,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91625150] [2024-05-12 12:37:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:50,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:50,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91625150] [2024-05-12 12:37:50,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91625150] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:50,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:50,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:50,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924726594] [2024-05-12 12:37:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:50,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:50,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:50,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 129 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:50,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:50,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:50,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:50,994 INFO L124 PetriNetUnfolderBase]: 469/852 cut-off events. [2024-05-12 12:37:50,995 INFO L125 PetriNetUnfolderBase]: For 806/806 co-relation queries the response was YES. [2024-05-12 12:37:50,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2296 conditions, 852 events. 469/852 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3811 event pairs, 109 based on Foata normal form. 27/875 useless extension candidates. Maximal degree in co-relation 2273. Up to 379 conditions per place. [2024-05-12 12:37:50,999 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 50 selfloop transitions, 11 changer transitions 20/85 dead transitions. [2024-05-12 12:37:50,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 85 transitions, 489 flow [2024-05-12 12:37:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 12:37:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 12:37:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-05-12 12:37:51,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-05-12 12:37:51,003 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 129 flow. Second operand 9 states and 148 transitions. [2024-05-12 12:37:51,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 85 transitions, 489 flow [2024-05-12 12:37:51,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 85 transitions, 468 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:51,013 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 223 flow [2024-05-12 12:37:51,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-05-12 12:37:51,015 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2024-05-12 12:37:51,015 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 223 flow [2024-05-12 12:37:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:37:51,016 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)] === [2024-05-12 12:37:51,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2039593339, now seen corresponding path program 2 times [2024-05-12 12:37:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517398052] [2024-05-12 12:37:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:51,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517398052] [2024-05-12 12:37:51,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517398052] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 12:37:51,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761831061] [2024-05-12 12:37:51,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:37:51,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:37:51,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:37:51,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:51,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 223 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:51,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,288 INFO L124 PetriNetUnfolderBase]: 415/768 cut-off events. [2024-05-12 12:37:51,288 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2024-05-12 12:37:51,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 768 events. 415/768 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3417 event pairs, 109 based on Foata normal form. 45/809 useless extension candidates. Maximal degree in co-relation 2405. Up to 367 conditions per place. [2024-05-12 12:37:51,292 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 41 selfloop transitions, 11 changer transitions 27/83 dead transitions. [2024-05-12 12:37:51,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 598 flow [2024-05-12 12:37:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 12:37:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 12:37:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-05-12 12:37:51,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2024-05-12 12:37:51,293 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 223 flow. Second operand 8 states and 131 transitions. [2024-05-12 12:37:51,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 598 flow [2024-05-12 12:37:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 578 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-05-12 12:37:51,298 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 279 flow [2024-05-12 12:37:51,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=279, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2024-05-12 12:37:51,299 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2024-05-12 12:37:51,299 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 279 flow [2024-05-12 12:37:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:37:51,300 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)] === [2024-05-12 12:37:51,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1855387724, now seen corresponding path program 1 times [2024-05-12 12:37:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334923074] [2024-05-12 12:37:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334923074] [2024-05-12 12:37:51,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334923074] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:37:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447739882] [2024-05-12 12:37:51,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:37:51,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:37:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:37:51,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:51,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:51,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,572 INFO L124 PetriNetUnfolderBase]: 550/1012 cut-off events. [2024-05-12 12:37:51,572 INFO L125 PetriNetUnfolderBase]: For 4296/4296 co-relation queries the response was YES. [2024-05-12 12:37:51,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3540 conditions, 1012 events. 550/1012 cut-off events. For 4296/4296 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4709 event pairs, 70 based on Foata normal form. 27/1031 useless extension candidates. Maximal degree in co-relation 3507. Up to 307 conditions per place. [2024-05-12 12:37:51,577 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 56 selfloop transitions, 20 changer transitions 23/103 dead transitions. [2024-05-12 12:37:51,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 797 flow [2024-05-12 12:37:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:37:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:37:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-05-12 12:37:51,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-05-12 12:37:51,579 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 279 flow. Second operand 11 states and 177 transitions. [2024-05-12 12:37:51,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 797 flow [2024-05-12 12:37:51,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 702 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-05-12 12:37:51,587 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 379 flow [2024-05-12 12:37:51,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2024-05-12 12:37:51,588 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 34 predicate places. [2024-05-12 12:37:51,588 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 379 flow [2024-05-12 12:37:51,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:37:51,589 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)] === [2024-05-12 12:37:51,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1849717684, now seen corresponding path program 2 times [2024-05-12 12:37:51,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78015926] [2024-05-12 12:37:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:51,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78015926] [2024-05-12 12:37:51,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78015926] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:37:51,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:37:51,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 12:37:51,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000485387] [2024-05-12 12:37:51,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:37:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 12:37:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 12:37:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-05-12 12:37:51,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:51,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 379 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:51,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:51,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:51,909 INFO L124 PetriNetUnfolderBase]: 595/1096 cut-off events. [2024-05-12 12:37:51,909 INFO L125 PetriNetUnfolderBase]: For 6834/6834 co-relation queries the response was YES. [2024-05-12 12:37:51,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1096 events. 595/1096 cut-off events. For 6834/6834 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5191 event pairs, 76 based on Foata normal form. 63/1151 useless extension candidates. Maximal degree in co-relation 4269. Up to 280 conditions per place. [2024-05-12 12:37:51,915 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 47 selfloop transitions, 22 changer transitions 33/106 dead transitions. [2024-05-12 12:37:51,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 957 flow [2024-05-12 12:37:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 12:37:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 12:37:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-05-12 12:37:51,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-05-12 12:37:51,917 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 379 flow. Second operand 11 states and 174 transitions. [2024-05-12 12:37:51,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 957 flow [2024-05-12 12:37:51,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 106 transitions, 882 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-05-12 12:37:51,927 INFO L231 Difference]: Finished difference. Result has 74 places, 48 transitions, 458 flow [2024-05-12 12:37:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=458, PETRI_PLACES=74, PETRI_TRANSITIONS=48} [2024-05-12 12:37:51,928 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2024-05-12 12:37:51,928 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 48 transitions, 458 flow [2024-05-12 12:37:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:37:51,929 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)] === [2024-05-12 12:37:51,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1675038584, now seen corresponding path program 1 times [2024-05-12 12:37:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296298833] [2024-05-12 12:37:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:52,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296298833] [2024-05-12 12:37:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296298833] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:52,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364941842] [2024-05-12 12:37:52,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:52,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:52,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:52,065 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) [2024-05-12 12:37:52,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 12:37:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:52,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 12:37:52,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:52,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:37:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:52,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364941842] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:37:52,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:37:52,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-05-12 12:37:52,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967554849] [2024-05-12 12:37:52,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:37:52,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 12:37:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 12:37:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-05-12 12:37:52,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:52,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 48 transitions, 458 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:52,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:52,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:52,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:52,852 INFO L124 PetriNetUnfolderBase]: 676/1257 cut-off events. [2024-05-12 12:37:52,852 INFO L125 PetriNetUnfolderBase]: For 11383/11383 co-relation queries the response was YES. [2024-05-12 12:37:52,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 1257 events. 676/1257 cut-off events. For 11383/11383 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5672 event pairs, 193 based on Foata normal form. 63/1316 useless extension candidates. Maximal degree in co-relation 5402. Up to 655 conditions per place. [2024-05-12 12:37:52,859 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 68 selfloop transitions, 17 changer transitions 67/156 dead transitions. [2024-05-12 12:37:52,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 156 transitions, 1532 flow [2024-05-12 12:37:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 12:37:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 12:37:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 292 transitions. [2024-05-12 12:37:52,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512280701754386 [2024-05-12 12:37:52,861 INFO L175 Difference]: Start difference. First operand has 74 places, 48 transitions, 458 flow. Second operand 19 states and 292 transitions. [2024-05-12 12:37:52,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 156 transitions, 1532 flow [2024-05-12 12:37:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 156 transitions, 1439 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-05-12 12:37:52,888 INFO L231 Difference]: Finished difference. Result has 94 places, 54 transitions, 593 flow [2024-05-12 12:37:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=593, PETRI_PLACES=94, PETRI_TRANSITIONS=54} [2024-05-12 12:37:52,889 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 62 predicate places. [2024-05-12 12:37:52,889 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 54 transitions, 593 flow [2024-05-12 12:37:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:52,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:52,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 12:37:53,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:53,101 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)] === [2024-05-12 12:37:53,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 846029844, now seen corresponding path program 2 times [2024-05-12 12:37:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:53,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216792806] [2024-05-12 12:37:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:53,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:53,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216792806] [2024-05-12 12:37:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216792806] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297910963] [2024-05-12 12:37:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:37:53,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:53,223 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) [2024-05-12 12:37:53,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 12:37:53,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:37:53,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:37:53,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 12:37:53,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:53,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:37:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297910963] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:37:53,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:37:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-05-12 12:37:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427933249] [2024-05-12 12:37:53,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:37:53,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-05-12 12:37:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-05-12 12:37:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-05-12 12:37:53,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:53,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 54 transitions, 593 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:53,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:53,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:53,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:53,990 INFO L124 PetriNetUnfolderBase]: 964/1773 cut-off events. [2024-05-12 12:37:53,990 INFO L125 PetriNetUnfolderBase]: For 38849/38849 co-relation queries the response was YES. [2024-05-12 12:37:53,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10111 conditions, 1773 events. 964/1773 cut-off events. For 38849/38849 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8774 event pairs, 88 based on Foata normal form. 72/1841 useless extension candidates. Maximal degree in co-relation 10061. Up to 403 conditions per place. [2024-05-12 12:37:54,002 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 91 selfloop transitions, 47 changer transitions 80/222 dead transitions. [2024-05-12 12:37:54,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 222 transitions, 2809 flow [2024-05-12 12:37:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-05-12 12:37:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-05-12 12:37:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 419 transitions. [2024-05-12 12:37:54,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172839506172839 [2024-05-12 12:37:54,005 INFO L175 Difference]: Start difference. First operand has 94 places, 54 transitions, 593 flow. Second operand 27 states and 419 transitions. [2024-05-12 12:37:54,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 222 transitions, 2809 flow [2024-05-12 12:37:54,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 222 transitions, 2339 flow, removed 224 selfloop flow, removed 12 redundant places. [2024-05-12 12:37:54,031 INFO L231 Difference]: Finished difference. Result has 122 places, 73 transitions, 1063 flow [2024-05-12 12:37:54,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1063, PETRI_PLACES=122, PETRI_TRANSITIONS=73} [2024-05-12 12:37:54,031 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2024-05-12 12:37:54,032 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 73 transitions, 1063 flow [2024-05-12 12:37:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:54,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:54,032 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, 1] [2024-05-12 12:37:54,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 12:37:54,243 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,SelfDestructingSolverStorable9 [2024-05-12 12:37:54,244 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)] === [2024-05-12 12:37:54,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -746903595, now seen corresponding path program 1 times [2024-05-12 12:37:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116874259] [2024-05-12 12:37:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:54,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116874259] [2024-05-12 12:37:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116874259] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124982275] [2024-05-12 12:37:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:54,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:54,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:54,340 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) [2024-05-12 12:37:54,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 12:37:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:54,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 12:37:54,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:54,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:37:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:54,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124982275] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:37:54,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:37:54,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-05-12 12:37:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209591751] [2024-05-12 12:37:54,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:37:54,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 12:37:54,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 12:37:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-05-12 12:37:54,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:54,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 73 transitions, 1063 flow. Second operand has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:54,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:55,170 INFO L124 PetriNetUnfolderBase]: 1198/2243 cut-off events. [2024-05-12 12:37:55,170 INFO L125 PetriNetUnfolderBase]: For 97546/97546 co-relation queries the response was YES. [2024-05-12 12:37:55,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16115 conditions, 2243 events. 1198/2243 cut-off events. For 97546/97546 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11910 event pairs, 206 based on Foata normal form. 63/2298 useless extension candidates. Maximal degree in co-relation 16051. Up to 616 conditions per place. [2024-05-12 12:37:55,234 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 101 selfloop transitions, 51 changer transitions 67/223 dead transitions. [2024-05-12 12:37:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 223 transitions, 3717 flow [2024-05-12 12:37:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-05-12 12:37:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-05-12 12:37:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 387 transitions. [2024-05-12 12:37:55,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-05-12 12:37:55,236 INFO L175 Difference]: Start difference. First operand has 122 places, 73 transitions, 1063 flow. Second operand 25 states and 387 transitions. [2024-05-12 12:37:55,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 223 transitions, 3717 flow [2024-05-12 12:37:55,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 223 transitions, 3168 flow, removed 267 selfloop flow, removed 10 redundant places. [2024-05-12 12:37:55,311 INFO L231 Difference]: Finished difference. Result has 143 places, 84 transitions, 1388 flow [2024-05-12 12:37:55,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1388, PETRI_PLACES=143, PETRI_TRANSITIONS=84} [2024-05-12 12:37:55,312 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 111 predicate places. [2024-05-12 12:37:55,312 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 84 transitions, 1388 flow [2024-05-12 12:37:55,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:55,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:55,313 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, 1] [2024-05-12 12:37:55,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 12:37:55,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:55,524 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)] === [2024-05-12 12:37:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -407460333, now seen corresponding path program 2 times [2024-05-12 12:37:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079917009] [2024-05-12 12:37:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:55,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079917009] [2024-05-12 12:37:55,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079917009] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:55,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560666862] [2024-05-12 12:37:55,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:37:55,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:55,644 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) [2024-05-12 12:37:55,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 12:37:55,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:37:55,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:37:55,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 12:37:55,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:55,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:37:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:55,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560666862] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:37:55,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:37:55,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-05-12 12:37:55,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126414878] [2024-05-12 12:37:55,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:37:55,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 12:37:55,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 12:37:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-05-12 12:37:55,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:55,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 84 transitions, 1388 flow. Second operand has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:55,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:55,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:55,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:56,695 INFO L124 PetriNetUnfolderBase]: 1441/2716 cut-off events. [2024-05-12 12:37:56,695 INFO L125 PetriNetUnfolderBase]: For 173753/173753 co-relation queries the response was YES. [2024-05-12 12:37:56,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21644 conditions, 2716 events. 1441/2716 cut-off events. For 173753/173753 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 14773 event pairs, 58 based on Foata normal form. 162/2874 useless extension candidates. Maximal degree in co-relation 21573. Up to 625 conditions per place. [2024-05-12 12:37:56,729 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 92 selfloop transitions, 76 changer transitions 93/265 dead transitions. [2024-05-12 12:37:56,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 265 transitions, 5030 flow [2024-05-12 12:37:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-05-12 12:37:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-05-12 12:37:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 433 transitions. [2024-05-12 12:37:56,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154761904761904 [2024-05-12 12:37:56,732 INFO L175 Difference]: Start difference. First operand has 143 places, 84 transitions, 1388 flow. Second operand 28 states and 433 transitions. [2024-05-12 12:37:56,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 265 transitions, 5030 flow [2024-05-12 12:37:56,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 265 transitions, 4299 flow, removed 332 selfloop flow, removed 18 redundant places. [2024-05-12 12:37:56,841 INFO L231 Difference]: Finished difference. Result has 162 places, 103 transitions, 1963 flow [2024-05-12 12:37:56,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1963, PETRI_PLACES=162, PETRI_TRANSITIONS=103} [2024-05-12 12:37:56,842 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2024-05-12 12:37:56,842 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 103 transitions, 1963 flow [2024-05-12 12:37:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.4375) internal successors, (167), 16 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:56,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:56,843 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 12:37:57,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:57,055 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)] === [2024-05-12 12:37:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash -15838221, now seen corresponding path program 3 times [2024-05-12 12:37:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418905989] [2024-05-12 12:37:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:57,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418905989] [2024-05-12 12:37:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418905989] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070231199] [2024-05-12 12:37:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:37:57,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:57,227 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) [2024-05-12 12:37:57,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 12:37:57,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 12:37:57,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:37:57,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 12:37:57,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:57,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:37:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:57,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070231199] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:37:57,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:37:57,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-05-12 12:37:57,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429949916] [2024-05-12 12:37:57,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:37:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-05-12 12:37:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:37:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-05-12 12:37:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-05-12 12:37:57,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:37:57,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 103 transitions, 1963 flow. Second operand has 24 states, 24 states have (on average 10.291666666666666) internal successors, (247), 24 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:57,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:37:57,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:37:57,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:37:58,975 INFO L124 PetriNetUnfolderBase]: 2089/3824 cut-off events. [2024-05-12 12:37:58,975 INFO L125 PetriNetUnfolderBase]: For 332509/332509 co-relation queries the response was YES. [2024-05-12 12:37:58,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34802 conditions, 3824 events. 2089/3824 cut-off events. For 332509/332509 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 19548 event pairs, 54 based on Foata normal form. 144/3964 useless extension candidates. Maximal degree in co-relation 34723. Up to 880 conditions per place. [2024-05-12 12:37:59,016 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 145 selfloop transitions, 110 changer transitions 135/394 dead transitions. [2024-05-12 12:37:59,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 394 transitions, 8301 flow [2024-05-12 12:37:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-05-12 12:37:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-05-12 12:37:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 707 transitions. [2024-05-12 12:37:59,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123188405797101 [2024-05-12 12:37:59,019 INFO L175 Difference]: Start difference. First operand has 162 places, 103 transitions, 1963 flow. Second operand 46 states and 707 transitions. [2024-05-12 12:37:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 394 transitions, 8301 flow [2024-05-12 12:37:59,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 394 transitions, 7122 flow, removed 557 selfloop flow, removed 20 redundant places. [2024-05-12 12:37:59,180 INFO L231 Difference]: Finished difference. Result has 208 places, 137 transitions, 3090 flow [2024-05-12 12:37:59,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3090, PETRI_PLACES=208, PETRI_TRANSITIONS=137} [2024-05-12 12:37:59,181 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 176 predicate places. [2024-05-12 12:37:59,181 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 137 transitions, 3090 flow [2024-05-12 12:37:59,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.291666666666666) internal successors, (247), 24 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:37:59,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:37:59,182 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:37:59,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 12:37:59,393 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,SelfDestructingSolverStorable12 [2024-05-12 12:37:59,393 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)] === [2024-05-12 12:37:59,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:37:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 847636988, now seen corresponding path program 4 times [2024-05-12 12:37:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:37:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348751148] [2024-05-12 12:37:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:37:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:37:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:37:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:59,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:37:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348751148] [2024-05-12 12:37:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348751148] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:37:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360545979] [2024-05-12 12:37:59,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:37:59,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:37:59,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:37:59,709 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) [2024-05-12 12:37:59,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 12:37:59,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:37:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:37:59,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 12:37:59,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:37:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:37:59,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:38:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360545979] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:38:00,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:38:00,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2024-05-12 12:38:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708191100] [2024-05-12 12:38:00,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:38:00,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-05-12 12:38:00,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-05-12 12:38:00,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2024-05-12 12:38:00,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:38:00,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 137 transitions, 3090 flow. Second operand has 35 states, 35 states have (on average 10.228571428571428) internal successors, (358), 35 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:00,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:00,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:38:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:02,748 INFO L124 PetriNetUnfolderBase]: 2827/5357 cut-off events. [2024-05-12 12:38:02,749 INFO L125 PetriNetUnfolderBase]: For 812115/812115 co-relation queries the response was YES. [2024-05-12 12:38:02,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62573 conditions, 5357 events. 2827/5357 cut-off events. For 812115/812115 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 28337 event pairs, 544 based on Foata normal form. 270/5619 useless extension candidates. Maximal degree in co-relation 62476. Up to 1936 conditions per place. [2024-05-12 12:38:02,794 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 190 selfloop transitions, 99 changer transitions 189/482 dead transitions. [2024-05-12 12:38:02,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 482 transitions, 13817 flow [2024-05-12 12:38:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-05-12 12:38:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-05-12 12:38:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 821 transitions. [2024-05-12 12:38:02,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49757575757575756 [2024-05-12 12:38:02,804 INFO L175 Difference]: Start difference. First operand has 208 places, 137 transitions, 3090 flow. Second operand 55 states and 821 transitions. [2024-05-12 12:38:02,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 482 transitions, 13817 flow [2024-05-12 12:38:03,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 482 transitions, 10207 flow, removed 1764 selfloop flow, removed 30 redundant places. [2024-05-12 12:38:03,502 INFO L231 Difference]: Finished difference. Result has 255 places, 179 transitions, 4088 flow [2024-05-12 12:38:03,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4088, PETRI_PLACES=255, PETRI_TRANSITIONS=179} [2024-05-12 12:38:03,503 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 223 predicate places. [2024-05-12 12:38:03,503 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 179 transitions, 4088 flow [2024-05-12 12:38:03,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.228571428571428) internal successors, (358), 35 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:03,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:03,503 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:03,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-05-12 12:38:03,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:03,715 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)] === [2024-05-12 12:38:03,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash -739790992, now seen corresponding path program 5 times [2024-05-12 12:38:03,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:03,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751994688] [2024-05-12 12:38:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:03,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:04,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751994688] [2024-05-12 12:38:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751994688] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:38:04,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443258007] [2024-05-12 12:38:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:38:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:38:04,014 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) [2024-05-12 12:38:04,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 12:38:04,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-05-12 12:38:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:38:04,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 12:38:04,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:38:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:04,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:38:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:04,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443258007] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:38:04,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:38:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-05-12 12:38:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973678457] [2024-05-12 12:38:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:38:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-05-12 12:38:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-05-12 12:38:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2024-05-12 12:38:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:38:04,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 179 transitions, 4088 flow. Second operand has 36 states, 36 states have (on average 10.25) internal successors, (369), 36 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:04,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:04,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:38:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:07,409 INFO L124 PetriNetUnfolderBase]: 3439/6780 cut-off events. [2024-05-12 12:38:07,409 INFO L125 PetriNetUnfolderBase]: For 1338591/1338591 co-relation queries the response was YES. [2024-05-12 12:38:07,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82622 conditions, 6780 events. 3439/6780 cut-off events. For 1338591/1338591 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 39250 event pairs, 310 based on Foata normal form. 270/7046 useless extension candidates. Maximal degree in co-relation 82511. Up to 1813 conditions per place. [2024-05-12 12:38:07,482 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 183 selfloop transitions, 189 changer transitions 201/577 dead transitions. [2024-05-12 12:38:07,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 577 transitions, 16732 flow [2024-05-12 12:38:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-05-12 12:38:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-05-12 12:38:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 917 transitions. [2024-05-12 12:38:07,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010928961748634 [2024-05-12 12:38:07,485 INFO L175 Difference]: Start difference. First operand has 255 places, 179 transitions, 4088 flow. Second operand 61 states and 917 transitions. [2024-05-12 12:38:07,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 577 transitions, 16732 flow [2024-05-12 12:38:09,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 577 transitions, 14246 flow, removed 1208 selfloop flow, removed 31 redundant places. [2024-05-12 12:38:09,178 INFO L231 Difference]: Finished difference. Result has 303 places, 240 transitions, 6231 flow [2024-05-12 12:38:09,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6231, PETRI_PLACES=303, PETRI_TRANSITIONS=240} [2024-05-12 12:38:09,180 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 271 predicate places. [2024-05-12 12:38:09,180 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 240 transitions, 6231 flow [2024-05-12 12:38:09,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 10.25) internal successors, (369), 36 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:09,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:09,181 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:09,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-05-12 12:38:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:09,392 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)] === [2024-05-12 12:38:09,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:09,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2105591292, now seen corresponding path program 6 times [2024-05-12 12:38:09,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428964283] [2024-05-12 12:38:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:09,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428964283] [2024-05-12 12:38:09,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428964283] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:38:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116269639] [2024-05-12 12:38:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 12:38:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:38:09,691 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) [2024-05-12 12:38:09,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-05-12 12:38:09,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-05-12 12:38:09,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:38:09,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2024-05-12 12:38:09,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:38:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:09,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:38:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116269639] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:38:10,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:38:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2024-05-12 12:38:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438260936] [2024-05-12 12:38:10,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:38:10,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-05-12 12:38:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-05-12 12:38:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-05-12 12:38:10,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:38:10,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 240 transitions, 6231 flow. Second operand has 35 states, 35 states have (on average 10.2) internal successors, (357), 35 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:10,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:10,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:38:10,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:14,227 INFO L124 PetriNetUnfolderBase]: 4645/9161 cut-off events. [2024-05-12 12:38:14,227 INFO L125 PetriNetUnfolderBase]: For 2734020/2734020 co-relation queries the response was YES. [2024-05-12 12:38:14,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131944 conditions, 9161 events. 4645/9161 cut-off events. For 2734020/2734020 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 56196 event pairs, 92 based on Foata normal form. 270/9423 useless extension candidates. Maximal degree in co-relation 131815. Up to 2419 conditions per place. [2024-05-12 12:38:14,343 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 228 selfloop transitions, 270 changer transitions 205/707 dead transitions. [2024-05-12 12:38:14,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 707 transitions, 23871 flow [2024-05-12 12:38:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-05-12 12:38:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-05-12 12:38:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1084 transitions. [2024-05-12 12:38:14,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089201877934272 [2024-05-12 12:38:14,346 INFO L175 Difference]: Start difference. First operand has 303 places, 240 transitions, 6231 flow. Second operand 71 states and 1084 transitions. [2024-05-12 12:38:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 707 transitions, 23871 flow [2024-05-12 12:38:17,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 707 transitions, 20036 flow, removed 1865 selfloop flow, removed 32 redundant places. [2024-05-12 12:38:17,227 INFO L231 Difference]: Finished difference. Result has 366 places, 301 transitions, 8778 flow [2024-05-12 12:38:17,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=8778, PETRI_PLACES=366, PETRI_TRANSITIONS=301} [2024-05-12 12:38:17,228 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 334 predicate places. [2024-05-12 12:38:17,229 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 301 transitions, 8778 flow [2024-05-12 12:38:17,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 10.2) internal successors, (357), 35 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:17,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:17,229 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:17,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-05-12 12:38:17,440 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,SelfDestructingSolverStorable15 [2024-05-12 12:38:17,441 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)] === [2024-05-12 12:38:17,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash -661310984, now seen corresponding path program 7 times [2024-05-12 12:38:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914836628] [2024-05-12 12:38:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:17,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914836628] [2024-05-12 12:38:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914836628] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:38:17,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022079382] [2024-05-12 12:38:17,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 12:38:17,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:38:17,867 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) [2024-05-12 12:38:17,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-05-12 12:38:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:17,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 25 conjunts are in the unsatisfiable core [2024-05-12 12:38:17,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:38:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:18,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:38:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:38:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022079382] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:38:18,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:38:18,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2024-05-12 12:38:18,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426549884] [2024-05-12 12:38:18,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:38:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-05-12 12:38:18,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-05-12 12:38:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2024-05-12 12:38:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:38:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 301 transitions, 8778 flow. Second operand has 45 states, 45 states have (on average 10.177777777777777) internal successors, (458), 45 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) [2024-05-12 12:38:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:38:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:25,693 INFO L124 PetriNetUnfolderBase]: 6670/12929 cut-off events. [2024-05-12 12:38:25,693 INFO L125 PetriNetUnfolderBase]: For 5933813/5933813 co-relation queries the response was YES. [2024-05-12 12:38:25,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221496 conditions, 12929 events. 6670/12929 cut-off events. For 5933813/5933813 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 79663 event pairs, 86 based on Foata normal form. 549/13474 useless extension candidates. Maximal degree in co-relation 221341. Up to 3397 conditions per place. [2024-05-12 12:38:25,884 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 316 selfloop transitions, 399 changer transitions 341/1060 dead transitions. [2024-05-12 12:38:25,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1060 transitions, 45189 flow [2024-05-12 12:38:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-05-12 12:38:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2024-05-12 12:38:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 1603 transitions. [2024-05-12 12:38:25,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-05-12 12:38:25,887 INFO L175 Difference]: Start difference. First operand has 366 places, 301 transitions, 8778 flow. Second operand 105 states and 1603 transitions. [2024-05-12 12:38:25,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1060 transitions, 45189 flow [2024-05-12 12:38:34,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 1060 transitions, 35017 flow, removed 4995 selfloop flow, removed 36 redundant places. [2024-05-12 12:38:34,086 INFO L231 Difference]: Finished difference. Result has 481 places, 432 transitions, 14369 flow [2024-05-12 12:38:34,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=14369, PETRI_PLACES=481, PETRI_TRANSITIONS=432} [2024-05-12 12:38:34,087 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 449 predicate places. [2024-05-12 12:38:34,087 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 432 transitions, 14369 flow [2024-05-12 12:38:34,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 10.177777777777777) internal successors, (458), 45 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) [2024-05-12 12:38:34,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:38:34,088 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:38:34,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-05-12 12:38:34,298 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,SelfDestructingSolverStorable16 [2024-05-12 12:38:34,298 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:38:34,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:38:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1506489552, now seen corresponding path program 8 times [2024-05-12 12:38:34,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:38:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199100837] [2024-05-12 12:38:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:38:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:38:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:38:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:38:34,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:38:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199100837] [2024-05-12 12:38:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199100837] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:38:34,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591568526] [2024-05-12 12:38:34,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 12:38:34,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:38:34,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:38:34,962 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) [2024-05-12 12:38:34,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-05-12 12:38:35,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 12:38:35,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:38:35,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 41 conjunts are in the unsatisfiable core [2024-05-12 12:38:35,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:38:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:38:35,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:38:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:38:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591568526] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:38:35,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:38:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 77 [2024-05-12 12:38:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412804054] [2024-05-12 12:38:35,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:38:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-05-12 12:38:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:38:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-05-12 12:38:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=4644, Unknown=0, NotChecked=0, Total=6006 [2024-05-12 12:38:36,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-05-12 12:38:36,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 432 transitions, 14369 flow. Second operand has 78 states, 78 states have (on average 8.14102564102564) internal successors, (635), 78 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:38:36,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:38:36,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-05-12 12:38:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:38:45,142 INFO L124 PetriNetUnfolderBase]: 7651/14625 cut-off events. [2024-05-12 12:38:45,142 INFO L125 PetriNetUnfolderBase]: For 8673206/8673206 co-relation queries the response was YES. [2024-05-12 12:38:45,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257444 conditions, 14625 events. 7651/14625 cut-off events. For 8673206/8673206 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 90233 event pairs, 82 based on Foata normal form. 72/14689 useless extension candidates. Maximal degree in co-relation 257243. Up to 3511 conditions per place. [2024-05-12 12:38:45,365 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 314 selfloop transitions, 574 changer transitions 195/1087 dead transitions. [2024-05-12 12:38:45,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1087 transitions, 50432 flow [2024-05-12 12:38:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-05-12 12:38:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-05-12 12:38:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1130 transitions. [2024-05-12 12:38:45,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-05-12 12:38:45,367 INFO L175 Difference]: Start difference. First operand has 481 places, 432 transitions, 14369 flow. Second operand 86 states and 1130 transitions. [2024-05-12 12:38:45,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1087 transitions, 50432 flow [2024-05-12 12:39:17,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1087 transitions, 32920 flow, removed 8570 selfloop flow, removed 57 redundant places. [2024-05-12 12:39:17,030 INFO L231 Difference]: Finished difference. Result has 506 places, 613 transitions, 16041 flow [2024-05-12 12:39:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=9507, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=16041, PETRI_PLACES=506, PETRI_TRANSITIONS=613} [2024-05-12 12:39:17,031 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 474 predicate places. [2024-05-12 12:39:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 613 transitions, 16041 flow [2024-05-12 12:39:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 8.14102564102564) internal successors, (635), 78 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:17,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:17,032 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:17,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-05-12 12:39:17,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 12:39:17,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:17,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1612421499, now seen corresponding path program 9 times [2024-05-12 12:39:17,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:17,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247282425] [2024-05-12 12:39:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:18,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247282425] [2024-05-12 12:39:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247282425] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:39:18,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844798647] [2024-05-12 12:39:18,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 12:39:18,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:39:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:39:18,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:39:18,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 12:39:18,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-05-12 12:39:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:39:18,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 49 conjunts are in the unsatisfiable core [2024-05-12 12:39:18,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:39:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:18,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:39:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844798647] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:39:18,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:39:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 45 [2024-05-12 12:39:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397102568] [2024-05-12 12:39:18,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:39:18,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-05-12 12:39:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:18,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-05-12 12:39:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2024-05-12 12:39:19,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:39:19,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 613 transitions, 16041 flow. Second operand has 46 states, 46 states have (on average 10.043478260869565) internal successors, (462), 46 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:19,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:19,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:39:19,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:39:28,050 INFO L124 PetriNetUnfolderBase]: 7696/14761 cut-off events. [2024-05-12 12:39:28,050 INFO L125 PetriNetUnfolderBase]: For 7360342/7360342 co-relation queries the response was YES. [2024-05-12 12:39:28,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222750 conditions, 14761 events. 7696/14761 cut-off events. For 7360342/7360342 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 91163 event pairs, 82 based on Foata normal form. 54/14807 useless extension candidates. Maximal degree in co-relation 222552. Up to 3553 conditions per place. [2024-05-12 12:39:28,261 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 323 selfloop transitions, 581 changer transitions 179/1087 dead transitions. [2024-05-12 12:39:28,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1087 transitions, 35318 flow [2024-05-12 12:39:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-05-12 12:39:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-05-12 12:39:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1296 transitions. [2024-05-12 12:39:28,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023255813953489 [2024-05-12 12:39:28,263 INFO L175 Difference]: Start difference. First operand has 506 places, 613 transitions, 16041 flow. Second operand 86 states and 1296 transitions. [2024-05-12 12:39:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1087 transitions, 35318 flow [2024-05-12 12:39:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1087 transitions, 32098 flow, removed 1444 selfloop flow, removed 38 redundant places. [2024-05-12 12:39:51,645 INFO L231 Difference]: Finished difference. Result has 553 places, 620 transitions, 15380 flow [2024-05-12 12:39:51,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=13589, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=15380, PETRI_PLACES=553, PETRI_TRANSITIONS=620} [2024-05-12 12:39:51,646 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 521 predicate places. [2024-05-12 12:39:51,646 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 620 transitions, 15380 flow [2024-05-12 12:39:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 10.043478260869565) internal successors, (462), 46 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:51,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:39:51,646 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:39:51,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-05-12 12:39:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:39:51,876 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:39:51,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:39:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2090581457, now seen corresponding path program 10 times [2024-05-12 12:39:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:39:51,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927403854] [2024-05-12 12:39:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:39:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:39:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:39:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:52,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:39:52,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927403854] [2024-05-12 12:39:52,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927403854] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:39:52,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313775294] [2024-05-12 12:39:52,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 12:39:52,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:39:52,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:39:52,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:39:52,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 12:39:52,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 12:39:52,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:39:52,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2024-05-12 12:39:52,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:39:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:52,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:39:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:39:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313775294] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:39:53,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:39:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 44 [2024-05-12 12:39:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129149424] [2024-05-12 12:39:53,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:39:53,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-05-12 12:39:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:39:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-05-12 12:39:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2024-05-12 12:39:53,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:39:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 620 transitions, 15380 flow. Second operand has 45 states, 45 states have (on average 10.022222222222222) internal successors, (451), 45 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:39:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:39:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:39:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:01,700 INFO L124 PetriNetUnfolderBase]: 8020/15364 cut-off events. [2024-05-12 12:40:01,700 INFO L125 PetriNetUnfolderBase]: For 7602132/7602132 co-relation queries the response was YES. [2024-05-12 12:40:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232668 conditions, 15364 events. 8020/15364 cut-off events. For 7602132/7602132 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 94989 event pairs, 70 based on Foata normal form. 54/15410 useless extension candidates. Maximal degree in co-relation 232470. Up to 3697 conditions per place. [2024-05-12 12:40:01,972 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 335 selfloop transitions, 591 changer transitions 175/1105 dead transitions. [2024-05-12 12:40:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1105 transitions, 35127 flow [2024-05-12 12:40:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-05-12 12:40:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-05-12 12:40:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 1316 transitions. [2024-05-12 12:40:01,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042145593869731 [2024-05-12 12:40:01,994 INFO L175 Difference]: Start difference. First operand has 553 places, 620 transitions, 15380 flow. Second operand 87 states and 1316 transitions. [2024-05-12 12:40:01,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1105 transitions, 35127 flow [2024-05-12 12:40:23,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1105 transitions, 33383 flow, removed 355 selfloop flow, removed 76 redundant places. [2024-05-12 12:40:23,957 INFO L231 Difference]: Finished difference. Result has 567 places, 628 transitions, 15992 flow [2024-05-12 12:40:23,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=13838, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=15992, PETRI_PLACES=567, PETRI_TRANSITIONS=628} [2024-05-12 12:40:23,958 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 535 predicate places. [2024-05-12 12:40:23,958 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 628 transitions, 15992 flow [2024-05-12 12:40:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 10.022222222222222) internal successors, (451), 45 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:23,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:40:23,959 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:40:23,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-05-12 12:40:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:40:24,169 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:40:24,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:40:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -380877199, now seen corresponding path program 11 times [2024-05-12 12:40:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:40:24,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806923918] [2024-05-12 12:40:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:40:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:40:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:40:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:40:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806923918] [2024-05-12 12:40:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806923918] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:40:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272884715] [2024-05-12 12:40:24,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 12:40:24,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:40:24,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:40:24,995 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:40:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-05-12 12:40:25,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-05-12 12:40:25,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:40:25,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2024-05-12 12:40:25,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:40:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:25,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:40:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:40:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272884715] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:40:25,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:40:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 45 [2024-05-12 12:40:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953476748] [2024-05-12 12:40:25,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:40:25,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-05-12 12:40:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:40:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-05-12 12:40:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2024-05-12 12:40:26,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-05-12 12:40:26,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 628 transitions, 15992 flow. Second operand has 46 states, 46 states have (on average 10.021739130434783) internal successors, (461), 46 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:40:26,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:40:26,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-05-12 12:40:26,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:40:34,682 INFO L124 PetriNetUnfolderBase]: 7894/15159 cut-off events. [2024-05-12 12:40:34,682 INFO L125 PetriNetUnfolderBase]: For 7745217/7745217 co-relation queries the response was YES. [2024-05-12 12:40:34,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230616 conditions, 15159 events. 7894/15159 cut-off events. For 7745217/7745217 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 93827 event pairs, 58 based on Foata normal form. 90/15245 useless extension candidates. Maximal degree in co-relation 230414. Up to 3643 conditions per place. [2024-05-12 12:40:34,910 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 326 selfloop transitions, 594 changer transitions 187/1111 dead transitions. [2024-05-12 12:40:34,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1111 transitions, 35752 flow [2024-05-12 12:40:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-05-12 12:40:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-05-12 12:40:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1329 transitions. [2024-05-12 12:40:34,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034090909090909 [2024-05-12 12:40:34,913 INFO L175 Difference]: Start difference. First operand has 567 places, 628 transitions, 15992 flow. Second operand 88 states and 1329 transitions. [2024-05-12 12:40:34,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1111 transitions, 35752 flow [2024-05-12 12:41:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1111 transitions, 33282 flow, removed 625 selfloop flow, removed 84 redundant places. [2024-05-12 12:41:03,501 INFO L231 Difference]: Finished difference. Result has 572 places, 629 transitions, 15549 flow [2024-05-12 12:41:03,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14142, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=15549, PETRI_PLACES=572, PETRI_TRANSITIONS=629} [2024-05-12 12:41:03,502 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 540 predicate places. [2024-05-12 12:41:03,502 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 629 transitions, 15549 flow [2024-05-12 12:41:03,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 10.021739130434783) internal successors, (461), 46 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:03,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:03,503 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:41:03,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-05-12 12:41:03,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-05-12 12:41:03,713 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:41:03,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:03,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1550604897, now seen corresponding path program 12 times [2024-05-12 12:41:03,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:03,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560073967] [2024-05-12 12:41:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:03,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:04,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560073967] [2024-05-12 12:41:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560073967] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:41:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412083126] [2024-05-12 12:41:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 12:41:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:41:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:41:04,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:41:04,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-05-12 12:41:04,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-05-12 12:41:04,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 12:41:04,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2024-05-12 12:41:04,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:41:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:04,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:41:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:41:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412083126] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 12:41:05,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 12:41:05,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 87 [2024-05-12 12:41:05,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38892034] [2024-05-12 12:41:05,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 12:41:05,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-05-12 12:41:05,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-05-12 12:41:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1747, Invalid=5909, Unknown=0, NotChecked=0, Total=7656 [2024-05-12 12:41:06,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-05-12 12:41:06,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 629 transitions, 15549 flow. Second operand has 88 states, 88 states have (on average 8.079545454545455) internal successors, (711), 88 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:06,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-05-12 12:41:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:41:15,154 INFO L124 PetriNetUnfolderBase]: 7966/15225 cut-off events. [2024-05-12 12:41:15,155 INFO L125 PetriNetUnfolderBase]: For 7641108/7641108 co-relation queries the response was YES. [2024-05-12 12:41:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229187 conditions, 15225 events. 7966/15225 cut-off events. For 7641108/7641108 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 93577 event pairs, 122 based on Foata normal form. 36/15257 useless extension candidates. Maximal degree in co-relation 228983. Up to 3643 conditions per place. [2024-05-12 12:41:15,379 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 349 selfloop transitions, 607 changer transitions 197/1157 dead transitions. [2024-05-12 12:41:15,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1157 transitions, 37567 flow [2024-05-12 12:41:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-05-12 12:41:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2024-05-12 12:41:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 1207 transitions. [2024-05-12 12:41:15,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43731884057971016 [2024-05-12 12:41:15,381 INFO L175 Difference]: Start difference. First operand has 572 places, 629 transitions, 15549 flow. Second operand 92 states and 1207 transitions. [2024-05-12 12:41:15,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1157 transitions, 37567 flow [2024-05-12 12:41:35,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1157 transitions, 35459 flow, removed 466 selfloop flow, removed 86 redundant places. [2024-05-12 12:41:35,912 INFO L231 Difference]: Finished difference. Result has 586 places, 650 transitions, 16729 flow [2024-05-12 12:41:35,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14019, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=16729, PETRI_PLACES=586, PETRI_TRANSITIONS=650} [2024-05-12 12:41:35,912 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 554 predicate places. [2024-05-12 12:41:35,913 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 650 transitions, 16729 flow [2024-05-12 12:41:35,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 8.079545454545455) internal successors, (711), 88 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:35,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:41:35,913 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, 1] [2024-05-12 12:41:35,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-05-12 12:41:36,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:41:36,123 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 12:41:36,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:41:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1312804852, now seen corresponding path program 13 times [2024-05-12 12:41:36,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:41:36,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706013237] [2024-05-12 12:41:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:41:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:41:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1098 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 12:41:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:41:36,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706013237] [2024-05-12 12:41:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706013237] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:41:36,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726488111] [2024-05-12 12:41:36,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 12:41:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:41:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:41:36,484 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:41:36,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-05-12 12:41:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:41:36,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2024-05-12 12:41:36,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:41:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-05-12 12:41:36,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 12:41:36,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726488111] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:41:36,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 12:41:36,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2024-05-12 12:41:36,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878251171] [2024-05-12 12:41:36,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:41:36,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-05-12 12:41:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:41:36,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-05-12 12:41:36,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2024-05-12 12:41:36,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-05-12 12:41:36,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 650 transitions, 16729 flow. Second operand has 23 states, 23 states have (on average 16.043478260869566) internal successors, (369), 23 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:41:36,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:41:36,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-05-12 12:41:36,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand