./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-multiply-verify.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-multiply-verify.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:56:44,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:56:45,006 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:56:45,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:56:45,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:56:45,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:56:45,037 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:56:45,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:56:45,038 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:56:45,041 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:56:45,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:56:45,041 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:56:45,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:56:45,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:56:45,043 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:56:45,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:56:45,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:56:45,043 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:56:45,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:56:45,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:56:45,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:56:45,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:56:45,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:56:45,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:56:45,045 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:56:45,045 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:56:45,045 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:56:45,046 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:56:45,046 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:56:45,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:56:45,047 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:56:45,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:56:45,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:56:45,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:56:45,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:56:45,048 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:56:45,048 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:56:45,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:56:45,050 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:56:45,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:56:45,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:56:45,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:56:45,280 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:56:45,280 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:56:45,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-multiply-verify.wvr.yml/witness.yml [2024-06-27 21:56:45,385 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:56:45,385 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:56:45,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-06-27 21:56:46,338 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:56:46,487 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:56:46,487 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-06-27 21:56:46,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7b77c9f/80468c9ea3e24b21aa920d94c3991a9d/FLAGd26c410f6 [2024-06-27 21:56:46,503 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f7b77c9f/80468c9ea3e24b21aa920d94c3991a9d [2024-06-27 21:56:46,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:56:46,505 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:56:46,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:56:46,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:56:46,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:56:46,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:45" (1/2) ... [2024-06-27 21:56:46,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362b8b1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:56:46, skipping insertion in model container [2024-06-27 21:56:46,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:45" (1/2) ... [2024-06-27 21:56:46,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21d04ccd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:56:46, skipping insertion in model container [2024-06-27 21:56:46,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:56:46" (2/2) ... [2024-06-27 21:56:46,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362b8b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46, skipping insertion in model container [2024-06-27 21:56:46,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:56:46" (2/2) ... [2024-06-27 21:56:46,513 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:56:46,528 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:56:46,529 INFO L97 edCorrectnessWitness]: Location invariant before [L103-L103] ! multithreaded || (long long )end - (long long )start >= 0LL [2024-06-27 21:56:46,529 INFO L97 edCorrectnessWitness]: Location invariant before [L105-L105] ! multithreaded || (long long )end - (long long )start >= 0LL [2024-06-27 21:56:46,529 INFO L97 edCorrectnessWitness]: Location invariant before [L104-L104] ! multithreaded || (long long )end - (long long )start >= 0LL [2024-06-27 21:56:46,529 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:56:46,529 INFO L106 edCorrectnessWitness]: ghost_update [L102-L102] multithreaded = 1; [2024-06-27 21:56:46,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:56:46,694 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-06-27 21:56:46,706 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:56:46,713 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:56:46,760 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-06-27 21:56:46,762 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:56:46,787 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:56:46,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46 WrapperNode [2024-06-27 21:56:46,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:56:46,788 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:56:46,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:56:46,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:56:46,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,820 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 177 [2024-06-27 21:56:46,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:56:46,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:56:46,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:56:46,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:56:46,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,836 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,856 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 21:56:46,857 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,869 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:56:46,875 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:56:46,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:56:46,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:56:46,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (1/1) ... [2024-06-27 21:56:46,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:56:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:46,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 21:56:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 21:56:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:56:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 21:56:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 21:56:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 21:56:46,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 21:56:46,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 21:56:46,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:56:46,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 21:56:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:56:46,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:56:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:56:46,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:56:46,928 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:56:47,011 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:56:47,013 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:56:47,317 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:56:47,317 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:56:47,459 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:56:47,459 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 21:56:47,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:56:47 BoogieIcfgContainer [2024-06-27 21:56:47,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:56:47,461 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:56:47,461 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:56:47,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:56:47,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:56:45" (1/4) ... [2024-06-27 21:56:47,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b641fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:56:47, skipping insertion in model container [2024-06-27 21:56:47,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:56:46" (2/4) ... [2024-06-27 21:56:47,465 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b641fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:56:47, skipping insertion in model container [2024-06-27 21:56:47,465 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:56:46" (3/4) ... [2024-06-27 21:56:47,467 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b641fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:56:47, skipping insertion in model container [2024-06-27 21:56:47,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:56:47" (4/4) ... [2024-06-27 21:56:47,470 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2024-06-27 21:56:47,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:56:47,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:56:47,491 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:56:47,547 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 21:56:47,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 42 transitions, 105 flow [2024-06-27 21:56:47,613 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2024-06-27 21:56:47,614 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 21:56:47,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 3/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 58 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-06-27 21:56:47,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 42 transitions, 105 flow [2024-06-27 21:56:47,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 38 transitions, 94 flow [2024-06-27 21:56:47,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:56:47,636 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;@40e24bda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:56:47,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 21:56:47,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:56:47,642 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-06-27 21:56:47,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:56:47,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:47,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-27 21:56:47,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:47,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2046227128, now seen corresponding path program 1 times [2024-06-27 21:56:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:47,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883502727] [2024-06-27 21:56:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:47,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883502727] [2024-06-27 21:56:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883502727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:47,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:56:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902306417] [2024-06-27 21:56:47,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:56:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:56:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:56:47,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:56:47,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:47,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:47,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:56:47,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:48,044 INFO L124 PetriNetUnfolderBase]: 519/858 cut-off events. [2024-06-27 21:56:48,045 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-06-27 21:56:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1725 conditions, 858 events. 519/858 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3497 event pairs, 422 based on Foata normal form. 75/897 useless extension candidates. Maximal degree in co-relation 1595. Up to 781 conditions per place. [2024-06-27 21:56:48,052 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 26 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-06-27 21:56:48,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 142 flow [2024-06-27 21:56:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:56:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:56:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-06-27 21:56:48,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 21:56:48,064 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-06-27 21:56:48,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 142 flow [2024-06-27 21:56:48,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:56:48,069 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 78 flow [2024-06-27 21:56:48,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-06-27 21:56:48,074 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -7 predicate places. [2024-06-27 21:56:48,074 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 78 flow [2024-06-27 21:56:48,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:48,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:48,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:56:48,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:48,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1976604084, now seen corresponding path program 1 times [2024-06-27 21:56:48,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452539648] [2024-06-27 21:56:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452539648] [2024-06-27 21:56:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452539648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:48,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:48,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:56:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835801239] [2024-06-27 21:56:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:48,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:56:48,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 21:56:48,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:48,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 21:56:48,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:48,501 INFO L124 PetriNetUnfolderBase]: 610/1040 cut-off events. [2024-06-27 21:56:48,502 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 21:56:48,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 1040 events. 610/1040 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4496 event pairs, 480 based on Foata normal form. 42/1057 useless extension candidates. Maximal degree in co-relation 2010. Up to 782 conditions per place. [2024-06-27 21:56:48,510 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 26 selfloop transitions, 2 changer transitions 15/51 dead transitions. [2024-06-27 21:56:48,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 199 flow [2024-06-27 21:56:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:56:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:56:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-27 21:56:48,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 21:56:48,513 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 78 flow. Second operand 4 states and 102 transitions. [2024-06-27 21:56:48,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 199 flow [2024-06-27 21:56:48,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:48,518 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 95 flow [2024-06-27 21:56:48,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-06-27 21:56:48,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-06-27 21:56:48,519 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 95 flow [2024-06-27 21:56:48,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:48,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:48,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:56:48,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:48,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash -111531741, now seen corresponding path program 1 times [2024-06-27 21:56:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741733294] [2024-06-27 21:56:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:48,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741733294] [2024-06-27 21:56:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741733294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:48,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:56:48,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:56:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691729788] [2024-06-27 21:56:48,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:48,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:56:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:56:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:56:48,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 21:56:48,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:48,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 21:56:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:48,746 INFO L124 PetriNetUnfolderBase]: 279/488 cut-off events. [2024-06-27 21:56:48,747 INFO L125 PetriNetUnfolderBase]: For 85/105 co-relation queries the response was YES. [2024-06-27 21:56:48,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 488 events. 279/488 cut-off events. For 85/105 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1741 event pairs, 70 based on Foata normal form. 35/511 useless extension candidates. Maximal degree in co-relation 1038. Up to 186 conditions per place. [2024-06-27 21:56:48,749 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 21:56:48,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 247 flow [2024-06-27 21:56:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:56:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:56:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-27 21:56:48,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-27 21:56:48,753 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 95 flow. Second operand 4 states and 95 transitions. [2024-06-27 21:56:48,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 247 flow [2024-06-27 21:56:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 243 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:56:48,756 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 120 flow [2024-06-27 21:56:48,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 21:56:48,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 21:56:48,758 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 120 flow [2024-06-27 21:56:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:48,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:48,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:48,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:56:48,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:48,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1622315295, now seen corresponding path program 2 times [2024-06-27 21:56:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852118131] [2024-06-27 21:56:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:48,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852118131] [2024-06-27 21:56:48,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852118131] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115671933] [2024-06-27 21:56:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:56:48,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:48,954 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:48,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 21:56:49,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 21:56:49,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:49,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 21:56:49,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:49,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:56:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115671933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:49,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:56:49,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-06-27 21:56:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365719199] [2024-06-27 21:56:49,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:49,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:56:49,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:56:49,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 120 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:49,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:49,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:56:49,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:49,692 INFO L124 PetriNetUnfolderBase]: 686/1162 cut-off events. [2024-06-27 21:56:49,693 INFO L125 PetriNetUnfolderBase]: For 591/605 co-relation queries the response was YES. [2024-06-27 21:56:49,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1162 events. 686/1162 cut-off events. For 591/605 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5545 event pairs, 161 based on Foata normal form. 6/1163 useless extension candidates. Maximal degree in co-relation 2795. Up to 416 conditions per place. [2024-06-27 21:56:49,699 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 14 changer transitions 18/108 dead transitions. [2024-06-27 21:56:49,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 108 transitions, 517 flow [2024-06-27 21:56:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 21:56:49,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 21:56:49,702 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 120 flow. Second operand 8 states and 174 transitions. [2024-06-27 21:56:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 108 transitions, 517 flow [2024-06-27 21:56:49,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 488 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:56:49,710 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 216 flow [2024-06-27 21:56:49,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-27 21:56:49,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-27 21:56:49,712 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 216 flow [2024-06-27 21:56:49,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:49,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:49,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:49,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 21:56:49,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:49,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:49,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1065302693, now seen corresponding path program 3 times [2024-06-27 21:56:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422152072] [2024-06-27 21:56:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:50,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422152072] [2024-06-27 21:56:50,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422152072] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:50,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53053749] [2024-06-27 21:56:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:56:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:50,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:50,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 21:56:50,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 21:56:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:50,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 21:56:50,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:56:50,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:56:50,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53053749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:50,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:56:50,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-06-27 21:56:50,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930327084] [2024-06-27 21:56:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:50,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:50,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:50,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:50,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:56:50,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:56:50,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:50,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:50,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:56:50,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:50,627 INFO L124 PetriNetUnfolderBase]: 934/1568 cut-off events. [2024-06-27 21:56:50,627 INFO L125 PetriNetUnfolderBase]: For 1530/1538 co-relation queries the response was YES. [2024-06-27 21:56:50,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 1568 events. 934/1568 cut-off events. For 1530/1538 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7957 event pairs, 231 based on Foata normal form. 6/1572 useless extension candidates. Maximal degree in co-relation 4437. Up to 496 conditions per place. [2024-06-27 21:56:50,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 71 selfloop transitions, 21 changer transitions 18/116 dead transitions. [2024-06-27 21:56:50,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 116 transitions, 664 flow [2024-06-27 21:56:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:56:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:56:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 21:56:50,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 21:56:50,638 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 216 flow. Second operand 8 states and 172 transitions. [2024-06-27 21:56:50,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 116 transitions, 664 flow [2024-06-27 21:56:50,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 116 transitions, 636 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:56:50,645 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 364 flow [2024-06-27 21:56:50,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-27 21:56:50,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-27 21:56:50,647 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 364 flow [2024-06-27 21:56:50,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:50,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:50,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:50,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 21:56:50,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:50,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:50,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1566356849, now seen corresponding path program 4 times [2024-06-27 21:56:50,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:50,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298432718] [2024-06-27 21:56:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:50,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:50,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298432718] [2024-06-27 21:56:50,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298432718] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:50,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799814096] [2024-06-27 21:56:50,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:56:50,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:50,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:50,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 21:56:51,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:56:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:51,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 21:56:51,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:51,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:56:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:51,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799814096] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:56:51,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:56:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-06-27 21:56:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160454522] [2024-06-27 21:56:51,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:56:51,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:56:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:56:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:56:51,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 21:56:51,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:51,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:51,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 21:56:51,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:51,439 INFO L124 PetriNetUnfolderBase]: 1361/2463 cut-off events. [2024-06-27 21:56:51,439 INFO L125 PetriNetUnfolderBase]: For 3658/3694 co-relation queries the response was YES. [2024-06-27 21:56:51,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 2463 events. 1361/2463 cut-off events. For 3658/3694 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15189 event pairs, 746 based on Foata normal form. 61/2491 useless extension candidates. Maximal degree in co-relation 7340. Up to 1091 conditions per place. [2024-06-27 21:56:51,456 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 42 selfloop transitions, 3 changer transitions 43/105 dead transitions. [2024-06-27 21:56:51,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 760 flow [2024-06-27 21:56:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:56:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:56:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:56:51,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 21:56:51,457 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 364 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:56:51,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 760 flow [2024-06-27 21:56:51,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 748 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 21:56:51,473 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 396 flow [2024-06-27 21:56:51,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-27 21:56:51,474 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-27 21:56:51,474 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 396 flow [2024-06-27 21:56:51,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:51,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 21:56:51,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:51,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:51,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1467644574, now seen corresponding path program 5 times [2024-06-27 21:56:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:51,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014382594] [2024-06-27 21:56:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:51,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014382594] [2024-06-27 21:56:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014382594] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044114286] [2024-06-27 21:56:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:56:52,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:52,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:52,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:52,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 21:56:52,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:56:52,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:52,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-27 21:56:53,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:53,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:56:53,478 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 21:56:53,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 34 [2024-06-27 21:56:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:53,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:56:54,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 108 [2024-06-27 21:56:54,300 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:56:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 162 [2024-06-27 21:56:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:55,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044114286] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:56:55,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:56:55,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-06-27 21:56:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440194074] [2024-06-27 21:56:55,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:56:55,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 21:56:55,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:55,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 21:56:55,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2024-06-27 21:56:55,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:56:55,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 396 flow. Second operand has 29 states, 29 states have (on average 11.689655172413794) internal successors, (339), 29 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:55,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:55,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:56:55,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:56:58,092 INFO L124 PetriNetUnfolderBase]: 2258/3883 cut-off events. [2024-06-27 21:56:58,093 INFO L125 PetriNetUnfolderBase]: For 6978/7001 co-relation queries the response was YES. [2024-06-27 21:56:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12081 conditions, 3883 events. 2258/3883 cut-off events. For 6978/7001 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23948 event pairs, 797 based on Foata normal form. 16/3891 useless extension candidates. Maximal degree in co-relation 12056. Up to 1346 conditions per place. [2024-06-27 21:56:58,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 35 changer transitions 18/244 dead transitions. [2024-06-27 21:56:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 244 transitions, 1628 flow [2024-06-27 21:56:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 21:56:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 21:56:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 366 transitions. [2024-06-27 21:56:58,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45864661654135336 [2024-06-27 21:56:58,120 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 396 flow. Second operand 19 states and 366 transitions. [2024-06-27 21:56:58,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 244 transitions, 1628 flow [2024-06-27 21:56:58,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 244 transitions, 1550 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 21:56:58,141 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 809 flow [2024-06-27 21:56:58,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=809, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-06-27 21:56:58,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-27 21:56:58,142 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 809 flow [2024-06-27 21:56:58,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.689655172413794) internal successors, (339), 29 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:58,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:56:58,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:56:58,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 21:56:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:58,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:56:58,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:56:58,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1638728644, now seen corresponding path program 6 times [2024-06-27 21:56:58,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:56:58,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284230474] [2024-06-27 21:56:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:56:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:56:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:56:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:56:59,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:56:59,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284230474] [2024-06-27 21:56:59,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284230474] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:56:59,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81180528] [2024-06-27 21:56:59,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:56:59,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:56:59,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:56:59,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:56:59,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 21:56:59,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-27 21:56:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:56:59,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 21:56:59,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:56:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:56:59,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:56:59,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81180528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:56:59,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:56:59,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-06-27 21:56:59,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943307407] [2024-06-27 21:56:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:56:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:56:59,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:56:59,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:56:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-06-27 21:56:59,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:56:59,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 809 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:56:59,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:56:59,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:56:59,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:00,021 INFO L124 PetriNetUnfolderBase]: 2402/4124 cut-off events. [2024-06-27 21:57:00,022 INFO L125 PetriNetUnfolderBase]: For 9873/9910 co-relation queries the response was YES. [2024-06-27 21:57:00,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13829 conditions, 4124 events. 2402/4124 cut-off events. For 9873/9910 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25698 event pairs, 550 based on Foata normal form. 28/4143 useless extension candidates. Maximal degree in co-relation 13797. Up to 1785 conditions per place. [2024-06-27 21:57:00,052 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 96 selfloop transitions, 37 changer transitions 19/158 dead transitions. [2024-06-27 21:57:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 158 transitions, 1319 flow [2024-06-27 21:57:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-27 21:57:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 21:57:00,054 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 809 flow. Second operand 8 states and 178 transitions. [2024-06-27 21:57:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 158 transitions, 1319 flow [2024-06-27 21:57:00,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1269 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:00,082 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 876 flow [2024-06-27 21:57:00,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2024-06-27 21:57:00,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-27 21:57:00,083 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 876 flow [2024-06-27 21:57:00,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:00,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:00,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:00,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:00,296 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:00,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 967377826, now seen corresponding path program 7 times [2024-06-27 21:57:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986704068] [2024-06-27 21:57:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:01,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986704068] [2024-06-27 21:57:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986704068] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:01,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114507680] [2024-06-27 21:57:01,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:57:01,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:01,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:01,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 21:57:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:01,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 21:57:01,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:02,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:02,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:02,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2024-06-27 21:57:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:02,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114507680] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:02,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 21:57:02,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 8] total 23 [2024-06-27 21:57:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049414518] [2024-06-27 21:57:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:02,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-06-27 21:57:02,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:02,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:02,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:02,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:02,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:02,978 INFO L124 PetriNetUnfolderBase]: 2454/4230 cut-off events. [2024-06-27 21:57:02,978 INFO L125 PetriNetUnfolderBase]: For 13589/13637 co-relation queries the response was YES. [2024-06-27 21:57:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14640 conditions, 4230 events. 2454/4230 cut-off events. For 13589/13637 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26606 event pairs, 569 based on Foata normal form. 42/4269 useless extension candidates. Maximal degree in co-relation 14606. Up to 1593 conditions per place. [2024-06-27 21:57:03,005 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 36 changer transitions 19/150 dead transitions. [2024-06-27 21:57:03,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1344 flow [2024-06-27 21:57:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 21:57:03,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 21:57:03,006 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 876 flow. Second operand 8 states and 167 transitions. [2024-06-27 21:57:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1344 flow [2024-06-27 21:57:03,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 150 transitions, 1274 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:03,040 INFO L231 Difference]: Finished difference. Result has 94 places, 98 transitions, 929 flow [2024-06-27 21:57:03,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=94, PETRI_TRANSITIONS=98} [2024-06-27 21:57:03,045 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-27 21:57:03,045 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 98 transitions, 929 flow [2024-06-27 21:57:03,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:03,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:03,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:03,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:03,256 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:03,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1938118668, now seen corresponding path program 8 times [2024-06-27 21:57:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004171831] [2024-06-27 21:57:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:04,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004171831] [2024-06-27 21:57:04,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004171831] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158295246] [2024-06-27 21:57:04,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:04,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:04,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:04,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 21:57:04,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 21:57:04,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:04,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 21:57:04,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:04,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:57:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158295246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:04,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:57:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-06-27 21:57:04,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40952662] [2024-06-27 21:57:04,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:04,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:04,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-06-27 21:57:04,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:04,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 98 transitions, 929 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:04,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:04,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:04,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:05,211 INFO L124 PetriNetUnfolderBase]: 2470/4266 cut-off events. [2024-06-27 21:57:05,212 INFO L125 PetriNetUnfolderBase]: For 15632/15670 co-relation queries the response was YES. [2024-06-27 21:57:05,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15063 conditions, 4266 events. 2470/4266 cut-off events. For 15632/15670 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26890 event pairs, 625 based on Foata normal form. 32/4295 useless extension candidates. Maximal degree in co-relation 15028. Up to 1812 conditions per place. [2024-06-27 21:57:05,239 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 35 changer transitions 19/154 dead transitions. [2024-06-27 21:57:05,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1431 flow [2024-06-27 21:57:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:05,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 21:57:05,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 21:57:05,240 INFO L175 Difference]: Start difference. First operand has 94 places, 98 transitions, 929 flow. Second operand 8 states and 165 transitions. [2024-06-27 21:57:05,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1431 flow [2024-06-27 21:57:05,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1369 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:05,281 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 991 flow [2024-06-27 21:57:05,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=991, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2024-06-27 21:57:05,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-27 21:57:05,282 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 991 flow [2024-06-27 21:57:05,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:05,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:05,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:05,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:05,496 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:05,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash -261526621, now seen corresponding path program 9 times [2024-06-27 21:57:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102477980] [2024-06-27 21:57:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:06,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:06,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102477980] [2024-06-27 21:57:06,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102477980] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:06,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29130748] [2024-06-27 21:57:06,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:06,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:06,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:06,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 21:57:06,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 21:57:06,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:06,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 21:57:06,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:57:06,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:57:06,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29130748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:06,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:57:06,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2024-06-27 21:57:06,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597913751] [2024-06-27 21:57:06,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:06,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:57:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:57:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-06-27 21:57:06,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:06,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 991 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:06,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:06,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:06,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:07,354 INFO L124 PetriNetUnfolderBase]: 2440/4220 cut-off events. [2024-06-27 21:57:07,354 INFO L125 PetriNetUnfolderBase]: For 17422/17460 co-relation queries the response was YES. [2024-06-27 21:57:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15306 conditions, 4220 events. 2440/4220 cut-off events. For 17422/17460 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26548 event pairs, 591 based on Foata normal form. 27/4238 useless extension candidates. Maximal degree in co-relation 15269. Up to 2005 conditions per place. [2024-06-27 21:57:07,382 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 101 selfloop transitions, 37 changer transitions 18/162 dead transitions. [2024-06-27 21:57:07,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 162 transitions, 1498 flow [2024-06-27 21:57:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:57:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:57:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-27 21:57:07,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 21:57:07,384 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 991 flow. Second operand 8 states and 173 transitions. [2024-06-27 21:57:07,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 162 transitions, 1498 flow [2024-06-27 21:57:07,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 162 transitions, 1425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:07,430 INFO L231 Difference]: Finished difference. Result has 101 places, 103 transitions, 1036 flow [2024-06-27 21:57:07,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1036, PETRI_PLACES=101, PETRI_TRANSITIONS=103} [2024-06-27 21:57:07,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-27 21:57:07,432 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 103 transitions, 1036 flow [2024-06-27 21:57:07,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:07,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:07,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:07,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:07,645 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,SelfDestructingSolverStorable10 [2024-06-27 21:57:07,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:07,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -104178929, now seen corresponding path program 1 times [2024-06-27 21:57:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:07,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279937024] [2024-06-27 21:57:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:07,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279937024] [2024-06-27 21:57:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279937024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:07,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423052005] [2024-06-27 21:57:07,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:07,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:57:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:57:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:57:07,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:07,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 103 transitions, 1036 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:07,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:07,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:07,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:08,381 INFO L124 PetriNetUnfolderBase]: 3667/6407 cut-off events. [2024-06-27 21:57:08,381 INFO L125 PetriNetUnfolderBase]: For 22711/22775 co-relation queries the response was YES. [2024-06-27 21:57:08,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21096 conditions, 6407 events. 3667/6407 cut-off events. For 22711/22775 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44179 event pairs, 1909 based on Foata normal form. 18/5688 useless extension candidates. Maximal degree in co-relation 21057. Up to 4001 conditions per place. [2024-06-27 21:57:08,426 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 121 selfloop transitions, 17 changer transitions 4/170 dead transitions. [2024-06-27 21:57:08,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1803 flow [2024-06-27 21:57:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:57:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:57:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 21:57:08,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 21:57:08,428 INFO L175 Difference]: Start difference. First operand has 101 places, 103 transitions, 1036 flow. Second operand 6 states and 153 transitions. [2024-06-27 21:57:08,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1803 flow [2024-06-27 21:57:08,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 1687 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:08,529 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 1073 flow [2024-06-27 21:57:08,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1073, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-06-27 21:57:08,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-27 21:57:08,530 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 1073 flow [2024-06-27 21:57:08,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:08,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:08,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:08,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:57:08,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:08,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:08,531 INFO L85 PathProgramCache]: Analyzing trace with hash 725724655, now seen corresponding path program 2 times [2024-06-27 21:57:08,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:08,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446870537] [2024-06-27 21:57:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:08,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446870537] [2024-06-27 21:57:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446870537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:08,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:08,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964119521] [2024-06-27 21:57:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:57:08,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:57:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:57:08,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:08,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 1073 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:08,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:08,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:08,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:09,297 INFO L124 PetriNetUnfolderBase]: 3813/6547 cut-off events. [2024-06-27 21:57:09,297 INFO L125 PetriNetUnfolderBase]: For 24007/24044 co-relation queries the response was YES. [2024-06-27 21:57:09,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25450 conditions, 6547 events. 3813/6547 cut-off events. For 24007/24044 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 44440 event pairs, 502 based on Foata normal form. 147/6682 useless extension candidates. Maximal degree in co-relation 25410. Up to 3089 conditions per place. [2024-06-27 21:57:09,351 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 138 selfloop transitions, 25 changer transitions 4/195 dead transitions. [2024-06-27 21:57:09,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 195 transitions, 2095 flow [2024-06-27 21:57:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 21:57:09,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 21:57:09,353 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 1073 flow. Second operand 7 states and 179 transitions. [2024-06-27 21:57:09,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 195 transitions, 2095 flow [2024-06-27 21:57:09,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 195 transitions, 2078 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 21:57:09,460 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1244 flow [2024-06-27 21:57:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-27 21:57:09,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-27 21:57:09,461 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1244 flow [2024-06-27 21:57:09,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:09,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:57:09,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:09,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1798620706, now seen corresponding path program 1 times [2024-06-27 21:57:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:09,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072855839] [2024-06-27 21:57:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:09,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:09,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072855839] [2024-06-27 21:57:09,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072855839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:09,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:09,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:57:09,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963977527] [2024-06-27 21:57:09,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:09,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:57:09,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:09,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:57:09,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:57:09,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:09,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1244 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:09,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:09,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:10,167 INFO L124 PetriNetUnfolderBase]: 3382/5886 cut-off events. [2024-06-27 21:57:10,167 INFO L125 PetriNetUnfolderBase]: For 25128/25208 co-relation queries the response was YES. [2024-06-27 21:57:10,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24125 conditions, 5886 events. 3382/5886 cut-off events. For 25128/25208 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39841 event pairs, 1368 based on Foata normal form. 144/5943 useless extension candidates. Maximal degree in co-relation 24082. Up to 3290 conditions per place. [2024-06-27 21:57:10,212 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 83 selfloop transitions, 14 changer transitions 34/155 dead transitions. [2024-06-27 21:57:10,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1716 flow [2024-06-27 21:57:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:57:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:57:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 21:57:10,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 21:57:10,214 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1244 flow. Second operand 5 states and 129 transitions. [2024-06-27 21:57:10,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1716 flow [2024-06-27 21:57:10,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1646 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:10,312 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 1018 flow [2024-06-27 21:57:10,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1018, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-06-27 21:57:10,313 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-27 21:57:10,313 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 1018 flow [2024-06-27 21:57:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:10,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:57:10,314 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:10,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1928423761, now seen corresponding path program 3 times [2024-06-27 21:57:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945770361] [2024-06-27 21:57:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:10,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:10,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945770361] [2024-06-27 21:57:10,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945770361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:10,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:10,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:57:10,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288266090] [2024-06-27 21:57:10,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:57:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:57:10,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:57:10,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:10,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 1018 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:10,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:10,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:10,974 INFO L124 PetriNetUnfolderBase]: 3327/5851 cut-off events. [2024-06-27 21:57:10,975 INFO L125 PetriNetUnfolderBase]: For 24181/24238 co-relation queries the response was YES. [2024-06-27 21:57:11,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23600 conditions, 5851 events. 3327/5851 cut-off events. For 24181/24238 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40021 event pairs, 1294 based on Foata normal form. 86/5838 useless extension candidates. Maximal degree in co-relation 23563. Up to 3263 conditions per place. [2024-06-27 21:57:11,095 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 103 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-27 21:57:11,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 1566 flow [2024-06-27 21:57:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:57:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:57:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 21:57:11,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 21:57:11,097 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 1018 flow. Second operand 6 states and 146 transitions. [2024-06-27 21:57:11,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 1566 flow [2024-06-27 21:57:11,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1506 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:11,168 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 1119 flow [2024-06-27 21:57:11,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2024-06-27 21:57:11,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 21:57:11,169 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 1119 flow [2024-06-27 21:57:11,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:11,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:57:11,170 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:11,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 888522855, now seen corresponding path program 4 times [2024-06-27 21:57:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122867066] [2024-06-27 21:57:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:11,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122867066] [2024-06-27 21:57:11,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122867066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:11,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:11,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:57:11,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522408161] [2024-06-27 21:57:11,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:57:11,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:57:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:57:11,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:11,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 1119 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:11,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:11,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:11,692 INFO L124 PetriNetUnfolderBase]: 3147/5597 cut-off events. [2024-06-27 21:57:11,693 INFO L125 PetriNetUnfolderBase]: For 25999/26072 co-relation queries the response was YES. [2024-06-27 21:57:11,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23656 conditions, 5597 events. 3147/5597 cut-off events. For 25999/26072 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38509 event pairs, 1458 based on Foata normal form. 58/5563 useless extension candidates. Maximal degree in co-relation 23618. Up to 3647 conditions per place. [2024-06-27 21:57:11,739 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 86 selfloop transitions, 21 changer transitions 8/137 dead transitions. [2024-06-27 21:57:11,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 137 transitions, 1452 flow [2024-06-27 21:57:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:57:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:57:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 21:57:11,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 21:57:11,740 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 1119 flow. Second operand 5 states and 120 transitions. [2024-06-27 21:57:11,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 137 transitions, 1452 flow [2024-06-27 21:57:11,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 137 transitions, 1414 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:11,825 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 1047 flow [2024-06-27 21:57:11,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1047, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2024-06-27 21:57:11,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 65 predicate places. [2024-06-27 21:57:11,826 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 1047 flow [2024-06-27 21:57:11,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:11,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:11,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:57:11,827 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:11,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash 368798069, now seen corresponding path program 5 times [2024-06-27 21:57:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:11,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986319834] [2024-06-27 21:57:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:11,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986319834] [2024-06-27 21:57:11,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986319834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:11,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:11,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:57:11,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70021898] [2024-06-27 21:57:11,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 21:57:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 21:57:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 21:57:11,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:11,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 1047 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:11,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:11,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:12,433 INFO L124 PetriNetUnfolderBase]: 3387/5933 cut-off events. [2024-06-27 21:57:12,434 INFO L125 PetriNetUnfolderBase]: For 28069/28147 co-relation queries the response was YES. [2024-06-27 21:57:12,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25039 conditions, 5933 events. 3387/5933 cut-off events. For 28069/28147 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39725 event pairs, 1051 based on Foata normal form. 159/6007 useless extension candidates. Maximal degree in co-relation 25002. Up to 2316 conditions per place. [2024-06-27 21:57:12,481 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 107 selfloop transitions, 14 changer transitions 11/152 dead transitions. [2024-06-27 21:57:12,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1635 flow [2024-06-27 21:57:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:57:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:57:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 21:57:12,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-27 21:57:12,482 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 1047 flow. Second operand 5 states and 128 transitions. [2024-06-27 21:57:12,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1635 flow [2024-06-27 21:57:12,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 152 transitions, 1571 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:12,580 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 1029 flow [2024-06-27 21:57:12,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1029, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2024-06-27 21:57:12,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-27 21:57:12,581 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 1029 flow [2024-06-27 21:57:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:12,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:12,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:12,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:57:12,582 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:12,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:12,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1221940279, now seen corresponding path program 6 times [2024-06-27 21:57:12,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:12,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928465866] [2024-06-27 21:57:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:12,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928465866] [2024-06-27 21:57:12,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928465866] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:12,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849762523] [2024-06-27 21:57:12,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:57:12,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:12,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:12,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 21:57:12,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 21:57:12,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:12,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 21:57:12,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:12,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:12,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849762523] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:12,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:12,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-06-27 21:57:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515821212] [2024-06-27 21:57:12,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:12,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:57:12,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:57:12,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:57:12,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 21:57:12,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 1029 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:12,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:12,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 21:57:12,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:13,475 INFO L124 PetriNetUnfolderBase]: 2983/5250 cut-off events. [2024-06-27 21:57:13,475 INFO L125 PetriNetUnfolderBase]: For 27626/27675 co-relation queries the response was YES. [2024-06-27 21:57:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23352 conditions, 5250 events. 2983/5250 cut-off events. For 27626/27675 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 34405 event pairs, 805 based on Foata normal form. 88/5268 useless extension candidates. Maximal degree in co-relation 23314. Up to 2115 conditions per place. [2024-06-27 21:57:13,517 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 100 selfloop transitions, 32 changer transitions 6/156 dead transitions. [2024-06-27 21:57:13,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 156 transitions, 1625 flow [2024-06-27 21:57:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:57:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:57:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:57:13,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-27 21:57:13,519 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 1029 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:57:13,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 156 transitions, 1625 flow [2024-06-27 21:57:13,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 156 transitions, 1559 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:57:13,597 INFO L231 Difference]: Finished difference. Result has 113 places, 103 transitions, 1078 flow [2024-06-27 21:57:13,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1078, PETRI_PLACES=113, PETRI_TRANSITIONS=103} [2024-06-27 21:57:13,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 21:57:13,598 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 103 transitions, 1078 flow [2024-06-27 21:57:13,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:13,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:13,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:13,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:13,809 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,SelfDestructingSolverStorable17 [2024-06-27 21:57:13,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:13,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 913849223, now seen corresponding path program 1 times [2024-06-27 21:57:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545976107] [2024-06-27 21:57:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:13,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:15,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:15,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545976107] [2024-06-27 21:57:15,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545976107] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:15,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414385385] [2024-06-27 21:57:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:15,688 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:15,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 21:57:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:15,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 21:57:15,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:15,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:57:16,252 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-06-27 21:57:16,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2024-06-27 21:57:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:16,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:18,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2024-06-27 21:57:18,255 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:57:18,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 164 [2024-06-27 21:57:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414385385] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:20,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 21:57:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799906869] [2024-06-27 21:57:20,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:20,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 21:57:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 21:57:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 21:57:20,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:20,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 103 transitions, 1078 flow. Second operand has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:20,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:20,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:20,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:27,332 INFO L124 PetriNetUnfolderBase]: 4039/6975 cut-off events. [2024-06-27 21:57:27,332 INFO L125 PetriNetUnfolderBase]: For 36690/36952 co-relation queries the response was YES. [2024-06-27 21:57:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31333 conditions, 6975 events. 4039/6975 cut-off events. For 36690/36952 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47136 event pairs, 1319 based on Foata normal form. 80/6983 useless extension candidates. Maximal degree in co-relation 31295. Up to 2158 conditions per place. [2024-06-27 21:57:27,378 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 51 changer transitions 49/352 dead transitions. [2024-06-27 21:57:27,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 352 transitions, 3267 flow [2024-06-27 21:57:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 21:57:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 21:57:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 498 transitions. [2024-06-27 21:57:27,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 21:57:27,382 INFO L175 Difference]: Start difference. First operand has 113 places, 103 transitions, 1078 flow. Second operand 27 states and 498 transitions. [2024-06-27 21:57:27,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 352 transitions, 3267 flow [2024-06-27 21:57:27,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 352 transitions, 3161 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:27,445 INFO L231 Difference]: Finished difference. Result has 145 places, 139 transitions, 1564 flow [2024-06-27 21:57:27,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1564, PETRI_PLACES=145, PETRI_TRANSITIONS=139} [2024-06-27 21:57:27,445 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-27 21:57:27,445 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 139 transitions, 1564 flow [2024-06-27 21:57:27,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:27,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:27,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:27,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:27,658 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:27,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1348099557, now seen corresponding path program 2 times [2024-06-27 21:57:27,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:27,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897842291] [2024-06-27 21:57:27,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:27,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:30,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897842291] [2024-06-27 21:57:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897842291] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531530268] [2024-06-27 21:57:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:30,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:30,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:30,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 21:57:30,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:57:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:30,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 21:57:30,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:30,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:30,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:30,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2024-06-27 21:57:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531530268] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:31,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2024-06-27 21:57:31,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112510565] [2024-06-27 21:57:31,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 21:57:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 21:57:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-06-27 21:57:31,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:31,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 139 transitions, 1564 flow. Second operand has 29 states, 29 states have (on average 11.862068965517242) internal successors, (344), 29 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:31,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:31,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:31,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:35,167 INFO L124 PetriNetUnfolderBase]: 6354/10825 cut-off events. [2024-06-27 21:57:35,167 INFO L125 PetriNetUnfolderBase]: For 60864/61118 co-relation queries the response was YES. [2024-06-27 21:57:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52433 conditions, 10825 events. 6354/10825 cut-off events. For 60864/61118 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 77326 event pairs, 991 based on Foata normal form. 72/10826 useless extension candidates. Maximal degree in co-relation 52385. Up to 1885 conditions per place. [2024-06-27 21:57:35,259 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 338 selfloop transitions, 109 changer transitions 41/506 dead transitions. [2024-06-27 21:57:35,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 506 transitions, 5114 flow [2024-06-27 21:57:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-27 21:57:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-27 21:57:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 657 transitions. [2024-06-27 21:57:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46008403361344535 [2024-06-27 21:57:35,261 INFO L175 Difference]: Start difference. First operand has 145 places, 139 transitions, 1564 flow. Second operand 34 states and 657 transitions. [2024-06-27 21:57:35,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 506 transitions, 5114 flow [2024-06-27 21:57:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 506 transitions, 4858 flow, removed 91 selfloop flow, removed 14 redundant places. [2024-06-27 21:57:35,461 INFO L231 Difference]: Finished difference. Result has 172 places, 189 transitions, 2295 flow [2024-06-27 21:57:35,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2295, PETRI_PLACES=172, PETRI_TRANSITIONS=189} [2024-06-27 21:57:35,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-27 21:57:35,462 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 189 transitions, 2295 flow [2024-06-27 21:57:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.862068965517242) internal successors, (344), 29 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:35,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:35,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:35,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:35,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:35,667 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:35,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:35,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1917304013, now seen corresponding path program 3 times [2024-06-27 21:57:35,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:35,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928048347] [2024-06-27 21:57:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928048347] [2024-06-27 21:57:38,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928048347] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490066505] [2024-06-27 21:57:38,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:38,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:38,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:38,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 21:57:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:57:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:38,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 21:57:38,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:38,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:57:38,579 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 21:57:38,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2024-06-27 21:57:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:38,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:39,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-06-27 21:57:39,474 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:57:39,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 147 [2024-06-27 21:57:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490066505] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:40,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:40,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 21:57:40,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773031995] [2024-06-27 21:57:40,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 21:57:40,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:40,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 21:57:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 21:57:40,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:40,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 189 transitions, 2295 flow. Second operand has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:40,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:40,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:40,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:45,226 INFO L124 PetriNetUnfolderBase]: 6754/11581 cut-off events. [2024-06-27 21:57:45,226 INFO L125 PetriNetUnfolderBase]: For 71483/71814 co-relation queries the response was YES. [2024-06-27 21:57:45,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57010 conditions, 11581 events. 6754/11581 cut-off events. For 71483/71814 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 84558 event pairs, 2418 based on Foata normal form. 50/11538 useless extension candidates. Maximal degree in co-relation 56954. Up to 3715 conditions per place. [2024-06-27 21:57:45,311 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 58 changer transitions 18/370 dead transitions. [2024-06-27 21:57:45,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 370 transitions, 4075 flow [2024-06-27 21:57:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-27 21:57:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-27 21:57:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 365 transitions. [2024-06-27 21:57:45,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573934837092732 [2024-06-27 21:57:45,314 INFO L175 Difference]: Start difference. First operand has 172 places, 189 transitions, 2295 flow. Second operand 19 states and 365 transitions. [2024-06-27 21:57:45,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 370 transitions, 4075 flow [2024-06-27 21:57:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 370 transitions, 3623 flow, removed 111 selfloop flow, removed 21 redundant places. [2024-06-27 21:57:45,578 INFO L231 Difference]: Finished difference. Result has 169 places, 197 transitions, 2116 flow [2024-06-27 21:57:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2116, PETRI_PLACES=169, PETRI_TRANSITIONS=197} [2024-06-27 21:57:45,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 21:57:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 197 transitions, 2116 flow [2024-06-27 21:57:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:45,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-06-27 21:57:45,791 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:57:45,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2090472273, now seen corresponding path program 4 times [2024-06-27 21:57:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:45,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853334692] [2024-06-27 21:57:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:45,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853334692] [2024-06-27 21:57:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853334692] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:48,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155756023] [2024-06-27 21:57:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:57:48,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:48,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:48,652 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:57:48,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 21:57:48,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:57:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:48,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 21:57:48,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:48,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:57:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:49,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:49,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-06-27 21:57:49,921 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 21:57:49,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 166 [2024-06-27 21:57:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155756023] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:50,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 21:57:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044003073] [2024-06-27 21:57:50,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 21:57:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 21:57:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 21:57:50,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:57:50,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 197 transitions, 2116 flow. Second operand has 37 states, 37 states have (on average 11.405405405405405) internal successors, (422), 37 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:50,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:50,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:57:50,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:59,131 INFO L124 PetriNetUnfolderBase]: 12417/21068 cut-off events. [2024-06-27 21:57:59,131 INFO L125 PetriNetUnfolderBase]: For 107117/107654 co-relation queries the response was YES. [2024-06-27 21:57:59,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98431 conditions, 21068 events. 12417/21068 cut-off events. For 107117/107654 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 165397 event pairs, 3374 based on Foata normal form. 45/20917 useless extension candidates. Maximal degree in co-relation 98379. Up to 3903 conditions per place. [2024-06-27 21:57:59,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 546 selfloop transitions, 174 changer transitions 57/795 dead transitions. [2024-06-27 21:57:59,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 795 transitions, 7842 flow [2024-06-27 21:57:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 21:57:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 21:57:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 969 transitions. [2024-06-27 21:57:59,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 21:57:59,399 INFO L175 Difference]: Start difference. First operand has 169 places, 197 transitions, 2116 flow. Second operand 51 states and 969 transitions. [2024-06-27 21:57:59,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 795 transitions, 7842 flow [2024-06-27 21:58:00,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 795 transitions, 7733 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 21:58:00,247 INFO L231 Difference]: Finished difference. Result has 225 places, 299 transitions, 3714 flow [2024-06-27 21:58:00,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2033, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3714, PETRI_PLACES=225, PETRI_TRANSITIONS=299} [2024-06-27 21:58:00,248 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-27 21:58:00,248 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 299 transitions, 3714 flow [2024-06-27 21:58:00,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.405405405405405) internal successors, (422), 37 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:00,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:00,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:00,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-06-27 21:58:00,452 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,SelfDestructingSolverStorable21 [2024-06-27 21:58:00,453 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:00,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1325548369, now seen corresponding path program 5 times [2024-06-27 21:58:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615995399] [2024-06-27 21:58:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615995399] [2024-06-27 21:58:03,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615995399] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342685830] [2024-06-27 21:58:03,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:58:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:03,522 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:03,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 21:58:03,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:58:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:03,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 21:58:03,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:03,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 21:58:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:04,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:04,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-06-27 21:58:04,929 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 21:58:04,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2024-06-27 21:58:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:05,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342685830] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:05,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:05,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 21:58:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413793761] [2024-06-27 21:58:05,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:05,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 21:58:05,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:05,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 21:58:05,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 21:58:05,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:58:05,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 299 transitions, 3714 flow. Second operand has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:05,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:05,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:58:05,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:16,357 INFO L124 PetriNetUnfolderBase]: 12850/21875 cut-off events. [2024-06-27 21:58:16,357 INFO L125 PetriNetUnfolderBase]: For 129147/129685 co-relation queries the response was YES. [2024-06-27 21:58:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106732 conditions, 21875 events. 12850/21875 cut-off events. For 129147/129685 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 173764 event pairs, 3576 based on Foata normal form. 77/21765 useless extension candidates. Maximal degree in co-relation 106663. Up to 4047 conditions per place. [2024-06-27 21:58:16,559 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 484 selfloop transitions, 166 changer transitions 36/704 dead transitions. [2024-06-27 21:58:16,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 704 transitions, 7841 flow [2024-06-27 21:58:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-27 21:58:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-27 21:58:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 716 transitions. [2024-06-27 21:58:16,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46074646074646075 [2024-06-27 21:58:16,568 INFO L175 Difference]: Start difference. First operand has 225 places, 299 transitions, 3714 flow. Second operand 37 states and 716 transitions. [2024-06-27 21:58:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 704 transitions, 7841 flow [2024-06-27 21:58:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 704 transitions, 7595 flow, removed 68 selfloop flow, removed 21 redundant places. [2024-06-27 21:58:17,678 INFO L231 Difference]: Finished difference. Result has 244 places, 316 transitions, 4150 flow [2024-06-27 21:58:17,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4150, PETRI_PLACES=244, PETRI_TRANSITIONS=316} [2024-06-27 21:58:17,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-27 21:58:17,678 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 316 transitions, 4150 flow [2024-06-27 21:58:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.5) internal successors, (414), 36 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:17,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:17,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:17,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-06-27 21:58:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:17,879 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:17,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1719405011, now seen corresponding path program 6 times [2024-06-27 21:58:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108065210] [2024-06-27 21:58:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:18,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108065210] [2024-06-27 21:58:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108065210] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215236699] [2024-06-27 21:58:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:58:18,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:18,925 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) [2024-06-27 21:58:18,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 21:58:19,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 21:58:19,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:19,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 21:58:19,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:19,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 21:58:19,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:19,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 40 [2024-06-27 21:58:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:19,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:20,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 72 [2024-06-27 21:58:20,475 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 21:58:20,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 144 [2024-06-27 21:58:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:20,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215236699] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:20,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:20,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 21:58:20,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218389947] [2024-06-27 21:58:20,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:20,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 21:58:20,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 21:58:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 21:58:21,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:58:21,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 316 transitions, 4150 flow. Second operand has 37 states, 37 states have (on average 11.432432432432432) internal successors, (423), 37 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:21,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:21,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:58:21,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:27,943 INFO L124 PetriNetUnfolderBase]: 13627/23178 cut-off events. [2024-06-27 21:58:27,944 INFO L125 PetriNetUnfolderBase]: For 159113/159819 co-relation queries the response was YES. [2024-06-27 21:58:28,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115644 conditions, 23178 events. 13627/23178 cut-off events. For 159113/159819 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 185982 event pairs, 4527 based on Foata normal form. 77/23029 useless extension candidates. Maximal degree in co-relation 115572. Up to 4263 conditions per place. [2024-06-27 21:58:28,208 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 488 selfloop transitions, 168 changer transitions 58/732 dead transitions. [2024-06-27 21:58:28,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 732 transitions, 8302 flow [2024-06-27 21:58:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-06-27 21:58:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-06-27 21:58:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 780 transitions. [2024-06-27 21:58:28,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 21:58:28,209 INFO L175 Difference]: Start difference. First operand has 244 places, 316 transitions, 4150 flow. Second operand 42 states and 780 transitions. [2024-06-27 21:58:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 732 transitions, 8302 flow [2024-06-27 21:58:29,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 732 transitions, 8031 flow, removed 41 selfloop flow, removed 22 redundant places. [2024-06-27 21:58:29,738 INFO L231 Difference]: Finished difference. Result has 270 places, 335 transitions, 4597 flow [2024-06-27 21:58:29,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4597, PETRI_PLACES=270, PETRI_TRANSITIONS=335} [2024-06-27 21:58:29,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-27 21:58:29,739 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 335 transitions, 4597 flow [2024-06-27 21:58:29,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 11.432432432432432) internal successors, (423), 37 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:29,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:29,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:29,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 21:58:29,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:29,951 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:29,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash -622732181, now seen corresponding path program 7 times [2024-06-27 21:58:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:29,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389349147] [2024-06-27 21:58:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:29,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:31,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:31,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389349147] [2024-06-27 21:58:31,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389349147] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:31,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174707187] [2024-06-27 21:58:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:58:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:31,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:31,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 21:58:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:31,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 21:58:31,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:31,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:58:32,233 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-06-27 21:58:32,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2024-06-27 21:58:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:32,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:33,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-06-27 21:58:33,474 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:58:33,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 147 [2024-06-27 21:58:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174707187] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:34,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 21:58:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520478506] [2024-06-27 21:58:34,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:34,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 21:58:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:34,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 21:58:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 21:58:34,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:58:34,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 335 transitions, 4597 flow. Second operand has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:34,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:34,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:58:34,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:42,321 INFO L124 PetriNetUnfolderBase]: 14433/24470 cut-off events. [2024-06-27 21:58:42,321 INFO L125 PetriNetUnfolderBase]: For 179565/180365 co-relation queries the response was YES. [2024-06-27 21:58:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123873 conditions, 24470 events. 14433/24470 cut-off events. For 179565/180365 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 196812 event pairs, 5928 based on Foata normal form. 115/24359 useless extension candidates. Maximal degree in co-relation 123793. Up to 11552 conditions per place. [2024-06-27 21:58:42,597 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 112 changer transitions 50/563 dead transitions. [2024-06-27 21:58:42,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 563 transitions, 7182 flow [2024-06-27 21:58:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 21:58:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 21:58:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 462 transitions. [2024-06-27 21:58:42,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 21:58:42,599 INFO L175 Difference]: Start difference. First operand has 270 places, 335 transitions, 4597 flow. Second operand 25 states and 462 transitions. [2024-06-27 21:58:42,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 563 transitions, 7182 flow [2024-06-27 21:58:44,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 563 transitions, 6936 flow, removed 31 selfloop flow, removed 27 redundant places. [2024-06-27 21:58:44,555 INFO L231 Difference]: Finished difference. Result has 274 places, 368 transitions, 5248 flow [2024-06-27 21:58:44,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5248, PETRI_PLACES=274, PETRI_TRANSITIONS=368} [2024-06-27 21:58:44,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-27 21:58:44,555 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 368 transitions, 5248 flow [2024-06-27 21:58:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:44,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:44,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:44,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-27 21:58:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-27 21:58:44,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:58:44,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1881450941, now seen corresponding path program 8 times [2024-06-27 21:58:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:44,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035033494] [2024-06-27 21:58:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:47,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035033494] [2024-06-27 21:58:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035033494] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:47,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346708961] [2024-06-27 21:58:47,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:58:47,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:47,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:47,262 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:58:47,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 21:58:47,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:58:47,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:47,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 21:58:47,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:47,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:58:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:47,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:48,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-06-27 21:58:48,706 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 21:58:48,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 142 [2024-06-27 21:58:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:48,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346708961] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:48,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:48,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 21:58:48,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765138900] [2024-06-27 21:58:48,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:48,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 21:58:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:48,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 21:58:48,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 21:58:49,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:58:49,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 368 transitions, 5248 flow. Second operand has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:49,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:49,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:58:49,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:00,979 INFO L124 PetriNetUnfolderBase]: 16650/28049 cut-off events. [2024-06-27 21:59:00,979 INFO L125 PetriNetUnfolderBase]: For 220275/221215 co-relation queries the response was YES. [2024-06-27 21:59:01,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146983 conditions, 28049 events. 16650/28049 cut-off events. For 220275/221215 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 227005 event pairs, 3441 based on Foata normal form. 128/27940 useless extension candidates. Maximal degree in co-relation 146896. Up to 5117 conditions per place. [2024-06-27 21:59:01,509 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 520 selfloop transitions, 272 changer transitions 69/879 dead transitions. [2024-06-27 21:59:01,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 879 transitions, 10690 flow [2024-06-27 21:59:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-06-27 21:59:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-06-27 21:59:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 936 transitions. [2024-06-27 21:59:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44571428571428573 [2024-06-27 21:59:01,512 INFO L175 Difference]: Start difference. First operand has 274 places, 368 transitions, 5248 flow. Second operand 50 states and 936 transitions. [2024-06-27 21:59:01,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 879 transitions, 10690 flow [2024-06-27 21:59:04,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 879 transitions, 10565 flow, removed 57 selfloop flow, removed 11 redundant places. [2024-06-27 21:59:04,235 INFO L231 Difference]: Finished difference. Result has 328 places, 447 transitions, 7233 flow [2024-06-27 21:59:04,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=7233, PETRI_PLACES=328, PETRI_TRANSITIONS=447} [2024-06-27 21:59:04,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-27 21:59:04,236 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 447 transitions, 7233 flow [2024-06-27 21:59:04,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:04,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:04,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:04,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:04,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-27 21:59:04,437 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:59:04,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1157462545, now seen corresponding path program 9 times [2024-06-27 21:59:04,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:04,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970373309] [2024-06-27 21:59:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:06,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970373309] [2024-06-27 21:59:06,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970373309] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:59:06,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560415776] [2024-06-27 21:59:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:59:06,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:06,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 21:59:06,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 21:59:06,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 21:59:06,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:59:06,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 21:59:06,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:06,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 21:59:07,096 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-06-27 21:59:07,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2024-06-27 21:59:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:07,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:59:08,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-06-27 21:59:08,376 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 21:59:08,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 143 [2024-06-27 21:59:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:09,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560415776] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:59:09,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:59:09,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 21:59:09,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323775406] [2024-06-27 21:59:09,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:59:09,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 21:59:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 21:59:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 21:59:09,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 21:59:09,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 447 transitions, 7233 flow. Second operand has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:09,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:09,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 21:59:09,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:21,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-06-27 21:59:22,684 INFO L124 PetriNetUnfolderBase]: 17072/28776 cut-off events. [2024-06-27 21:59:22,684 INFO L125 PetriNetUnfolderBase]: For 270998/272001 co-relation queries the response was YES. [2024-06-27 21:59:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157760 conditions, 28776 events. 17072/28776 cut-off events. For 270998/272001 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 234692 event pairs, 7262 based on Foata normal form. 164/28666 useless extension candidates. Maximal degree in co-relation 157657. Up to 13191 conditions per place. [2024-06-27 21:59:23,179 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 464 selfloop transitions, 138 changer transitions 49/669 dead transitions. [2024-06-27 21:59:23,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 669 transitions, 9990 flow [2024-06-27 21:59:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 21:59:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 21:59:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 474 transitions. [2024-06-27 21:59:23,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2024-06-27 21:59:23,180 INFO L175 Difference]: Start difference. First operand has 328 places, 447 transitions, 7233 flow. Second operand 25 states and 474 transitions. [2024-06-27 21:59:23,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 669 transitions, 9990 flow [2024-06-27 21:59:26,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 669 transitions, 9511 flow, removed 143 selfloop flow, removed 22 redundant places. [2024-06-27 21:59:26,885 INFO L231 Difference]: Finished difference. Result has 330 places, 467 transitions, 7524 flow [2024-06-27 21:59:26,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7524, PETRI_PLACES=330, PETRI_TRANSITIONS=467} [2024-06-27 21:59:26,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-27 21:59:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 467 transitions, 7524 flow [2024-06-27 21:59:26,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.368421052631579) internal successors, (432), 38 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:26,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:26,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:26,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:27,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-27 21:59:27,087 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 21:59:27,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -741966281, now seen corresponding path program 10 times [2024-06-27 21:59:27,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:27,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110337393] [2024-06-27 21:59:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:27,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat