./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.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-queue-add-2-nl.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-queue-add-2-nl.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-queue-add-2-nl.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 21:57:01,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:57:01,440 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:57:01,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:57:01,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:57:01,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:57:01,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:57:01,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:57:01,486 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:57:01,490 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:57:01,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:57:01,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:57:01,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:57:01,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:57:01,496 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:57:01,497 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:57:01,497 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:57:01,497 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:57:01,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:57:01,498 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:57:01,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:57:01,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:57:01,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:57:01,499 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:57:01,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:57:01,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:57:01,499 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:57:01,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:57:01,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:57:01,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:57:01,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:57:01,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:57:01,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:57:01,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:57:01,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:57:01,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:57:01,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:57:01,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:57:01,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:57:01,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:57:01,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:57:01,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:57:01,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:57:01,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 21:57:01,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:57:01,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:57:01,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:57:01,745 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:57:01,745 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:57:01,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-06-27 21:57:02,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:57:03,061 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:57:03,062 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-06-27 21:57:03,073 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab94d4ea3/607c50c4e6f0426b8a238f4c4833cccf/FLAG8a7f04f47 [2024-06-27 21:57:03,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab94d4ea3/607c50c4e6f0426b8a238f4c4833cccf [2024-06-27 21:57:03,092 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:57:03,092 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:57:03,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/popl20-more-queue-add-2-nl.wvr.yml/witness.yml [2024-06-27 21:57:03,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:57:03,156 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:57:03,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:57:03,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:57:03,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:57:03,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:57:03" (1/2) ... [2024-06-27 21:57:03,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d30d1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:57:03, skipping insertion in model container [2024-06-27 21:57:03,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:57:03" (1/2) ... [2024-06-27 21:57:03,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@719fdc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:57:03, skipping insertion in model container [2024-06-27 21:57:03,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:03" (2/2) ... [2024-06-27 21:57:03,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d30d1bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03, skipping insertion in model container [2024-06-27 21:57:03,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:03" (2/2) ... [2024-06-27 21:57:03,170 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:57:03,189 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:57:03,190 INFO L97 edCorrectnessWitness]: Location invariant before [L101-L101] ! multithreaded || (4294967296LL + (long long )q_back) + (long long )q_front >= 0LL [2024-06-27 21:57:03,190 INFO L97 edCorrectnessWitness]: Location invariant before [L100-L100] ! multithreaded || (4294967296LL + (long long )q_back) + (long long )q_front >= 0LL [2024-06-27 21:57:03,190 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:57:03,190 INFO L106 edCorrectnessWitness]: ghost_update [L99-L99] multithreaded = 1; [2024-06-27 21:57:03,211 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:57:03,383 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-queue-add-2-nl.wvr.c[2896,2909] [2024-06-27 21:57:03,392 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:57:03,400 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:57:03,449 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-queue-add-2-nl.wvr.c[2896,2909] [2024-06-27 21:57:03,453 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:57:03,472 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:57:03,473 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03 WrapperNode [2024-06-27 21:57:03,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:57:03,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:57:03,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:57:03,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:57:03,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,488 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,510 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 164 [2024-06-27 21:57:03,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:57:03,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:57:03,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:57:03,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:57:03,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,537 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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 21:57:03,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,551 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:57:03,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:57:03,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:57:03,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:57:03,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (1/1) ... [2024-06-27 21:57:03,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:57:03,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:03,581 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 21:57:03,605 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 21:57:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:57:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 21:57:03,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 21:57:03,621 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 21:57:03,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 21:57:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:57:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:57:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:57:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:57:03,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:57:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:57:03,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 21:57:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:57:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:57:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:57:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:57:03,626 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 21:57:03,746 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:57:03,748 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:57:04,061 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:57:04,061 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:57:04,295 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:57:04,295 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 21:57:04,296 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:57:04 BoogieIcfgContainer [2024-06-27 21:57:04,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:57:04,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:57:04,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:57:04,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:57:04,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:57:03" (1/4) ... [2024-06-27 21:57:04,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb84877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:57:04, skipping insertion in model container [2024-06-27 21:57:04,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:57:03" (2/4) ... [2024-06-27 21:57:04,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb84877 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:57:04, skipping insertion in model container [2024-06-27 21:57:04,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:57:03" (3/4) ... [2024-06-27 21:57:04,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb84877 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:57:04, skipping insertion in model container [2024-06-27 21:57:04,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:57:04" (4/4) ... [2024-06-27 21:57:04,306 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-06-27 21:57:04,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:57:04,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:57:04,322 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:57:04,367 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 21:57:04,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 82 flow [2024-06-27 21:57:04,438 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-06-27 21:57:04,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 21:57:04,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 4/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-06-27 21:57:04,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 34 transitions, 82 flow [2024-06-27 21:57:04,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 31 transitions, 74 flow [2024-06-27 21:57:04,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:57:04,460 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;@5f8ddd13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:57:04,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 21:57:04,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:57:04,472 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-06-27 21:57:04,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:57:04,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:04,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-27 21:57:04,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:04,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1739265895, now seen corresponding path program 1 times [2024-06-27 21:57:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:04,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860774511] [2024-06-27 21:57:04,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:04,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:04,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860774511] [2024-06-27 21:57:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860774511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:04,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:04,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:57:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469988813] [2024-06-27 21:57:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:04,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:57:04,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:57:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:57:04,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 21:57:04,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:04,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:04,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 21:57:04,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:04,988 INFO L124 PetriNetUnfolderBase]: 180/340 cut-off events. [2024-06-27 21:57:04,988 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-27 21:57:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 340 events. 180/340 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1196 event pairs, 69 based on Foata normal form. 34/351 useless extension candidates. Maximal degree in co-relation 611. Up to 251 conditions per place. [2024-06-27 21:57:04,993 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 28 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-06-27 21:57:04,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 153 flow [2024-06-27 21:57:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:57:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:57:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-06-27 21:57:05,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6176470588235294 [2024-06-27 21:57:05,007 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 74 flow. Second operand 3 states and 63 transitions. [2024-06-27 21:57:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 153 flow [2024-06-27 21:57:05,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 143 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:05,013 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 87 flow [2024-06-27 21:57:05,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2024-06-27 21:57:05,018 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2024-06-27 21:57:05,020 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 87 flow [2024-06-27 21:57:05,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:05,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:05,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:57:05,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:05,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash -9866054, now seen corresponding path program 1 times [2024-06-27 21:57:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:05,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384951311] [2024-06-27 21:57:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:05,233 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 21:57:05,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:05,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384951311] [2024-06-27 21:57:05,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384951311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:05,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:05,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 21:57:05,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037753920] [2024-06-27 21:57:05,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:05,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:05,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:57:05,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-06-27 21:57:05,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:05,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-06-27 21:57:05,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:05,460 INFO L124 PetriNetUnfolderBase]: 167/369 cut-off events. [2024-06-27 21:57:05,461 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-06-27 21:57:05,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 369 events. 167/369 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1484 event pairs, 112 based on Foata normal form. 13/354 useless extension candidates. Maximal degree in co-relation 383. Up to 252 conditions per place. [2024-06-27 21:57:05,469 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 9/42 dead transitions. [2024-06-27 21:57:05,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 175 flow [2024-06-27 21:57:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-27 21:57:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661764705882353 [2024-06-27 21:57:05,475 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 87 flow. Second operand 4 states and 77 transitions. [2024-06-27 21:57:05,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 175 flow [2024-06-27 21:57:05,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:57:05,480 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 100 flow [2024-06-27 21:57:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-06-27 21:57:05,482 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-06-27 21:57:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 100 flow [2024-06-27 21:57:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:05,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:57:05,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:05,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1685470555, now seen corresponding path program 1 times [2024-06-27 21:57:05,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723266045] [2024-06-27 21:57:05,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:05,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:05,649 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 21:57:05,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:05,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723266045] [2024-06-27 21:57:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723266045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:57:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877600818] [2024-06-27 21:57:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:57:05,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-06-27 21:57:05,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:05,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-06-27 21:57:05,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:05,749 INFO L124 PetriNetUnfolderBase]: 125/251 cut-off events. [2024-06-27 21:57:05,749 INFO L125 PetriNetUnfolderBase]: For 84/86 co-relation queries the response was YES. [2024-06-27 21:57:05,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 251 events. 125/251 cut-off events. For 84/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 834 event pairs, 36 based on Foata normal form. 32/270 useless extension candidates. Maximal degree in co-relation 533. Up to 170 conditions per place. [2024-06-27 21:57:05,751 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 27 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-06-27 21:57:05,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 165 flow [2024-06-27 21:57:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:05,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-06-27 21:57:05,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-27 21:57:05,753 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 100 flow. Second operand 4 states and 67 transitions. [2024-06-27 21:57:05,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 165 flow [2024-06-27 21:57:05,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 157 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:05,755 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 90 flow [2024-06-27 21:57:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-06-27 21:57:05,756 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-06-27 21:57:05,756 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 90 flow [2024-06-27 21:57:05,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:05,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:05,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:57:05,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:05,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1786245270, now seen corresponding path program 1 times [2024-06-27 21:57:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:05,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767293487] [2024-06-27 21:57:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:06,415 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 21:57:06,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:06,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767293487] [2024-06-27 21:57:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767293487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:06,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:06,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:06,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375778375] [2024-06-27 21:57:06,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:06,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:06,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 90 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:06,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:06,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:06,682 INFO L124 PetriNetUnfolderBase]: 182/360 cut-off events. [2024-06-27 21:57:06,683 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-27 21:57:06,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 360 events. 182/360 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1414 event pairs, 10 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 766. Up to 211 conditions per place. [2024-06-27 21:57:06,685 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 46 selfloop transitions, 13 changer transitions 5/70 dead transitions. [2024-06-27 21:57:06,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 317 flow [2024-06-27 21:57:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:57:06,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-06-27 21:57:06,691 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 90 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:57:06,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 317 flow [2024-06-27 21:57:06,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 21:57:06,694 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 160 flow [2024-06-27 21:57:06,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=160, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-27 21:57:06,695 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2024-06-27 21:57:06,696 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 160 flow [2024-06-27 21:57:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:06,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:06,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:06,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:57:06,697 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:06,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1270231464, now seen corresponding path program 2 times [2024-06-27 21:57:06,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:06,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491258768] [2024-06-27 21:57:06,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:06,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:07,153 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 21:57:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491258768] [2024-06-27 21:57:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491258768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:07,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:07,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710659646] [2024-06-27 21:57:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:07,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:07,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 160 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:07,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:07,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:07,381 INFO L124 PetriNetUnfolderBase]: 204/419 cut-off events. [2024-06-27 21:57:07,381 INFO L125 PetriNetUnfolderBase]: For 231/232 co-relation queries the response was YES. [2024-06-27 21:57:07,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1146 conditions, 419 events. 204/419 cut-off events. For 231/232 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1783 event pairs, 40 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 1133. Up to 238 conditions per place. [2024-06-27 21:57:07,385 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 46 selfloop transitions, 20 changer transitions 5/77 dead transitions. [2024-06-27 21:57:07,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 77 transitions, 446 flow [2024-06-27 21:57:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:57:07,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-06-27 21:57:07,387 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 160 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:57:07,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 77 transitions, 446 flow [2024-06-27 21:57:07,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 437 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:07,391 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 282 flow [2024-06-27 21:57:07,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=282, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 21:57:07,392 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2024-06-27 21:57:07,392 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 282 flow [2024-06-27 21:57:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:07,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:57:07,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:07,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:07,393 INFO L85 PathProgramCache]: Analyzing trace with hash 882601312, now seen corresponding path program 3 times [2024-06-27 21:57:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:07,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600014651] [2024-06-27 21:57:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:07,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:07,739 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 21:57:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600014651] [2024-06-27 21:57:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600014651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547588541] [2024-06-27 21:57:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:07,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:07,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 282 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:07,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:07,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:07,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:08,008 INFO L124 PetriNetUnfolderBase]: 213/458 cut-off events. [2024-06-27 21:57:08,008 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-06-27 21:57:08,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 458 events. 213/458 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2134 event pairs, 33 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 1437. Up to 224 conditions per place. [2024-06-27 21:57:08,012 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 53 selfloop transitions, 26 changer transitions 5/90 dead transitions. [2024-06-27 21:57:08,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 596 flow [2024-06-27 21:57:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:57:08,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:57:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-27 21:57:08,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48663101604278075 [2024-06-27 21:57:08,014 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 282 flow. Second operand 11 states and 182 transitions. [2024-06-27 21:57:08,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 596 flow [2024-06-27 21:57:08,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 573 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:08,023 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 357 flow [2024-06-27 21:57:08,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=357, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-06-27 21:57:08,026 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2024-06-27 21:57:08,027 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 357 flow [2024-06-27 21:57:08,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:08,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:08,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:57:08,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:08,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1700710324, now seen corresponding path program 4 times [2024-06-27 21:57:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:08,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879943528] [2024-06-27 21:57:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:08,395 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 21:57:08,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:08,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879943528] [2024-06-27 21:57:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879943528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:08,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:08,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306618564] [2024-06-27 21:57:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:08,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:08,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 357 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:08,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:08,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:08,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:08,617 INFO L124 PetriNetUnfolderBase]: 225/493 cut-off events. [2024-06-27 21:57:08,618 INFO L125 PetriNetUnfolderBase]: For 1022/1023 co-relation queries the response was YES. [2024-06-27 21:57:08,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 493 events. 225/493 cut-off events. For 1022/1023 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2360 event pairs, 52 based on Foata normal form. 2/495 useless extension candidates. Maximal degree in co-relation 1648. Up to 290 conditions per place. [2024-06-27 21:57:08,622 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 56 selfloop transitions, 23 changer transitions 5/90 dead transitions. [2024-06-27 21:57:08,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 683 flow [2024-06-27 21:57:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:57:08,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-06-27 21:57:08,624 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 357 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:57:08,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 683 flow [2024-06-27 21:57:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 90 transitions, 618 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:57:08,630 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 419 flow [2024-06-27 21:57:08,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=419, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-06-27 21:57:08,632 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2024-06-27 21:57:08,632 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 419 flow [2024-06-27 21:57:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:08,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:08,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:57:08,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:08,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash 904131860, now seen corresponding path program 5 times [2024-06-27 21:57:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:08,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547810860] [2024-06-27 21:57:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:08,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:08,984 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 21:57:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547810860] [2024-06-27 21:57:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547810860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:08,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:08,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228027728] [2024-06-27 21:57:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:08,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:09,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:09,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 419 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:09,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:09,228 INFO L124 PetriNetUnfolderBase]: 240/528 cut-off events. [2024-06-27 21:57:09,228 INFO L125 PetriNetUnfolderBase]: For 1269/1281 co-relation queries the response was YES. [2024-06-27 21:57:09,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 528 events. 240/528 cut-off events. For 1269/1281 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2609 event pairs, 38 based on Foata normal form. 3/531 useless extension candidates. Maximal degree in co-relation 1852. Up to 319 conditions per place. [2024-06-27 21:57:09,233 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 60 selfloop transitions, 23 changer transitions 5/94 dead transitions. [2024-06-27 21:57:09,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 94 transitions, 739 flow [2024-06-27 21:57:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 21:57:09,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2024-06-27 21:57:09,236 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 419 flow. Second operand 10 states and 168 transitions. [2024-06-27 21:57:09,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 94 transitions, 739 flow [2024-06-27 21:57:09,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 94 transitions, 695 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:09,242 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 468 flow [2024-06-27 21:57:09,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=468, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-06-27 21:57:09,243 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 45 predicate places. [2024-06-27 21:57:09,243 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 468 flow [2024-06-27 21:57:09,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:09,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:57:09,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:09,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2052669352, now seen corresponding path program 6 times [2024-06-27 21:57:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:09,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111020522] [2024-06-27 21:57:09,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:09,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:09,535 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 21:57:09,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:09,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111020522] [2024-06-27 21:57:09,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111020522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:09,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:09,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:09,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652297696] [2024-06-27 21:57:09,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:09,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:09,537 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 10 interpolants. [2024-06-27 21:57:09,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:09,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:09,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 468 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:09,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:09,739 INFO L124 PetriNetUnfolderBase]: 236/515 cut-off events. [2024-06-27 21:57:09,739 INFO L125 PetriNetUnfolderBase]: For 1910/1934 co-relation queries the response was YES. [2024-06-27 21:57:09,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1958 conditions, 515 events. 236/515 cut-off events. For 1910/1934 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2506 event pairs, 38 based on Foata normal form. 11/526 useless extension candidates. Maximal degree in co-relation 1927. Up to 323 conditions per place. [2024-06-27 21:57:09,744 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 54 selfloop transitions, 22 changer transitions 8/90 dead transitions. [2024-06-27 21:57:09,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 90 transitions, 754 flow [2024-06-27 21:57:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 21:57:09,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47941176470588237 [2024-06-27 21:57:09,746 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 468 flow. Second operand 10 states and 163 transitions. [2024-06-27 21:57:09,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 90 transitions, 754 flow [2024-06-27 21:57:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 689 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:09,752 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 458 flow [2024-06-27 21:57:09,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=458, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2024-06-27 21:57:09,753 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 48 predicate places. [2024-06-27 21:57:09,753 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 458 flow [2024-06-27 21:57:09,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:09,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:09,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:09,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:57:09,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:09,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:09,755 INFO L85 PathProgramCache]: Analyzing trace with hash 63360314, now seen corresponding path program 7 times [2024-06-27 21:57:09,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:09,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658606728] [2024-06-27 21:57:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:09,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:10,078 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 21:57:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658606728] [2024-06-27 21:57:10,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658606728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:10,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23021256] [2024-06-27 21:57:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:10,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:10,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:10,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 458 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:10,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:10,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:10,264 INFO L124 PetriNetUnfolderBase]: 232/518 cut-off events. [2024-06-27 21:57:10,265 INFO L125 PetriNetUnfolderBase]: For 1972/1989 co-relation queries the response was YES. [2024-06-27 21:57:10,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 518 events. 232/518 cut-off events. For 1972/1989 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2563 event pairs, 55 based on Foata normal form. 6/524 useless extension candidates. Maximal degree in co-relation 1935. Up to 315 conditions per place. [2024-06-27 21:57:10,269 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 58 selfloop transitions, 22 changer transitions 5/91 dead transitions. [2024-06-27 21:57:10,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 788 flow [2024-06-27 21:57:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 21:57:10,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-06-27 21:57:10,271 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 458 flow. Second operand 10 states and 165 transitions. [2024-06-27 21:57:10,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 788 flow [2024-06-27 21:57:10,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 736 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:10,276 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 474 flow [2024-06-27 21:57:10,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-06-27 21:57:10,277 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 49 predicate places. [2024-06-27 21:57:10,277 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 474 flow [2024-06-27 21:57:10,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:10,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:10,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:57:10,278 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:10,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1001161204, now seen corresponding path program 8 times [2024-06-27 21:57:10,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:10,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548007426] [2024-06-27 21:57:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:10,577 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 21:57:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:10,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548007426] [2024-06-27 21:57:10,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548007426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:10,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:10,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939172702] [2024-06-27 21:57:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:10,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:10,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:10,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:10,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:10,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:10,796 INFO L124 PetriNetUnfolderBase]: 228/505 cut-off events. [2024-06-27 21:57:10,796 INFO L125 PetriNetUnfolderBase]: For 2262/2279 co-relation queries the response was YES. [2024-06-27 21:57:10,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 505 events. 228/505 cut-off events. For 2262/2279 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2479 event pairs, 53 based on Foata normal form. 12/517 useless extension candidates. Maximal degree in co-relation 1943. Up to 309 conditions per place. [2024-06-27 21:57:10,800 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 54 selfloop transitions, 22 changer transitions 8/90 dead transitions. [2024-06-27 21:57:10,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 782 flow [2024-06-27 21:57:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:57:10,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-06-27 21:57:10,801 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 474 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:57:10,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 782 flow [2024-06-27 21:57:10,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 90 transitions, 722 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:10,808 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 465 flow [2024-06-27 21:57:10,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=465, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2024-06-27 21:57:10,809 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 51 predicate places. [2024-06-27 21:57:10,809 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 465 flow [2024-06-27 21:57:10,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:10,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:10,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:10,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:57:10,810 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:10,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:10,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2033774862, now seen corresponding path program 9 times [2024-06-27 21:57:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:10,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655644198] [2024-06-27 21:57:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:10,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,151 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 21:57:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655644198] [2024-06-27 21:57:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655644198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:11,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485790086] [2024-06-27 21:57:11,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:11,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:11,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:11,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 465 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:11,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:11,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:11,406 INFO L124 PetriNetUnfolderBase]: 240/534 cut-off events. [2024-06-27 21:57:11,406 INFO L125 PetriNetUnfolderBase]: For 2517/2542 co-relation queries the response was YES. [2024-06-27 21:57:11,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 534 events. 240/534 cut-off events. For 2517/2542 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2625 event pairs, 61 based on Foata normal form. 6/539 useless extension candidates. Maximal degree in co-relation 2057. Up to 315 conditions per place. [2024-06-27 21:57:11,410 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 62 selfloop transitions, 22 changer transitions 5/95 dead transitions. [2024-06-27 21:57:11,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 836 flow [2024-06-27 21:57:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 21:57:11,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-06-27 21:57:11,412 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 465 flow. Second operand 10 states and 169 transitions. [2024-06-27 21:57:11,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 836 flow [2024-06-27 21:57:11,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 784 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:11,418 INFO L231 Difference]: Finished difference. Result has 87 places, 68 transitions, 518 flow [2024-06-27 21:57:11,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=518, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2024-06-27 21:57:11,419 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2024-06-27 21:57:11,419 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 518 flow [2024-06-27 21:57:11,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:11,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:11,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:57:11,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash 931305234, now seen corresponding path program 10 times [2024-06-27 21:57:11,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277070412] [2024-06-27 21:57:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,674 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 21:57:11,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277070412] [2024-06-27 21:57:11,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277070412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:11,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:57:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:57:11,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407827126] [2024-06-27 21:57:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:11,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:57:11,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:11,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:57:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:57:11,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-06-27 21:57:11,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 518 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:11,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-06-27 21:57:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:11,870 INFO L124 PetriNetUnfolderBase]: 236/520 cut-off events. [2024-06-27 21:57:11,871 INFO L125 PetriNetUnfolderBase]: For 3349/3390 co-relation queries the response was YES. [2024-06-27 21:57:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 520 events. 236/520 cut-off events. For 3349/3390 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2541 event pairs, 61 based on Foata normal form. 14/533 useless extension candidates. Maximal degree in co-relation 2115. Up to 319 conditions per place. [2024-06-27 21:57:11,875 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 56 selfloop transitions, 21 changer transitions 8/91 dead transitions. [2024-06-27 21:57:11,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 835 flow [2024-06-27 21:57:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:57:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:57:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:57:11,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2024-06-27 21:57:11,877 INFO L175 Difference]: Start difference. First operand has 87 places, 68 transitions, 518 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:57:11,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 835 flow [2024-06-27 21:57:11,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 760 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:11,884 INFO L231 Difference]: Finished difference. Result has 90 places, 68 transitions, 498 flow [2024-06-27 21:57:11,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2024-06-27 21:57:11,885 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 56 predicate places. [2024-06-27 21:57:11,885 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 498 flow [2024-06-27 21:57:11,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:11,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:11,886 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] [2024-06-27 21:57:11,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:57:11,886 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:11,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2042637808, now seen corresponding path program 1 times [2024-06-27 21:57:11,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:11,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224510188] [2024-06-27 21:57:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:11,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224510188] [2024-06-27 21:57:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224510188] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:11,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152353631] [2024-06-27 21:57:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:11,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:11,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:12,020 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 21:57:12,048 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 21:57:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:12,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-27 21:57:12,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:12,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:12,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152353631] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:12,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:12,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-27 21:57:12,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462702437] [2024-06-27 21:57:12,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 21:57:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 21:57:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 21:57:12,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-06-27 21:57:12,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 498 flow. Second operand has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:12,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:12,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-06-27 21:57:12,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:12,513 INFO L124 PetriNetUnfolderBase]: 377/904 cut-off events. [2024-06-27 21:57:12,513 INFO L125 PetriNetUnfolderBase]: For 6069/6119 co-relation queries the response was YES. [2024-06-27 21:57:12,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3742 conditions, 904 events. 377/904 cut-off events. For 6069/6119 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5472 event pairs, 185 based on Foata normal form. 40/942 useless extension candidates. Maximal degree in co-relation 3706. Up to 391 conditions per place. [2024-06-27 21:57:12,520 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 109 selfloop transitions, 5 changer transitions 10/131 dead transitions. [2024-06-27 21:57:12,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 131 transitions, 1223 flow [2024-06-27 21:57:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:57:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:57:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 21:57:12,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-06-27 21:57:12,522 INFO L175 Difference]: Start difference. First operand has 90 places, 68 transitions, 498 flow. Second operand 6 states and 116 transitions. [2024-06-27 21:57:12,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 131 transitions, 1223 flow [2024-06-27 21:57:12,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 131 transitions, 1113 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 21:57:12,533 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 488 flow [2024-06-27 21:57:12,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=488, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2024-06-27 21:57:12,534 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2024-06-27 21:57:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 488 flow [2024-06-27 21:57:12,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:12,535 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] [2024-06-27 21:57:12,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:12,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 21:57:12,750 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:12,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash 618081967, now seen corresponding path program 2 times [2024-06-27 21:57:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183636460] [2024-06-27 21:57:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:13,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183636460] [2024-06-27 21:57:13,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183636460] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:13,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112275694] [2024-06-27 21:57:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:13,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:13,198 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 21:57:13,223 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 21:57:13,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:57:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:13,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 21:57:13,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:13,598 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:13,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-06-27 21:57:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:13,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:13,790 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:13,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 21:57:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112275694] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:13,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:13,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2024-06-27 21:57:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028088731] [2024-06-27 21:57:13,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:13,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-06-27 21:57:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-06-27 21:57:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-06-27 21:57:14,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:14,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 488 flow. Second operand has 24 states, 24 states have (on average 8.666666666666666) internal successors, (208), 24 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:14,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:14,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:14,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:15,496 INFO L124 PetriNetUnfolderBase]: 1231/2480 cut-off events. [2024-06-27 21:57:15,497 INFO L125 PetriNetUnfolderBase]: For 18631/18637 co-relation queries the response was YES. [2024-06-27 21:57:15,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9790 conditions, 2480 events. 1231/2480 cut-off events. For 18631/18637 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15188 event pairs, 124 based on Foata normal form. 101/2580 useless extension candidates. Maximal degree in co-relation 9375. Up to 484 conditions per place. [2024-06-27 21:57:15,516 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 241 selfloop transitions, 66 changer transitions 0/311 dead transitions. [2024-06-27 21:57:15,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 311 transitions, 2641 flow [2024-06-27 21:57:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 21:57:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 21:57:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 386 transitions. [2024-06-27 21:57:15,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541176470588235 [2024-06-27 21:57:15,520 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 488 flow. Second operand 25 states and 386 transitions. [2024-06-27 21:57:15,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 311 transitions, 2641 flow [2024-06-27 21:57:15,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 311 transitions, 2558 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 21:57:15,548 INFO L231 Difference]: Finished difference. Result has 127 places, 128 transitions, 1296 flow [2024-06-27 21:57:15,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1296, PETRI_PLACES=127, PETRI_TRANSITIONS=128} [2024-06-27 21:57:15,549 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 93 predicate places. [2024-06-27 21:57:15,550 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 128 transitions, 1296 flow [2024-06-27 21:57:15,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.666666666666666) internal successors, (208), 24 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:15,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:15,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 21:57:15,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 21:57:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 21:57:15,759 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:15,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1213584854, now seen corresponding path program 1 times [2024-06-27 21:57:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:15,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721995272] [2024-06-27 21:57:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721995272] [2024-06-27 21:57:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721995272] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605449241] [2024-06-27 21:57:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:15,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:15,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:15,857 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 21:57:15,874 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 21:57:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:15,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2024-06-27 21:57:15,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:15,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 21:57:15,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605449241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:57:15,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 21:57:15,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-06-27 21:57:15,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916958767] [2024-06-27 21:57:15,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:57:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:57:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:57:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:57:15,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-06-27 21:57:15,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 128 transitions, 1296 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:15,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:15,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-06-27 21:57:15,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:16,388 INFO L124 PetriNetUnfolderBase]: 1080/2436 cut-off events. [2024-06-27 21:57:16,388 INFO L125 PetriNetUnfolderBase]: For 32714/33022 co-relation queries the response was YES. [2024-06-27 21:57:16,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11760 conditions, 2436 events. 1080/2436 cut-off events. For 32714/33022 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 16340 event pairs, 268 based on Foata normal form. 143/2557 useless extension candidates. Maximal degree in co-relation 11630. Up to 1000 conditions per place. [2024-06-27 21:57:16,411 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 90 selfloop transitions, 24 changer transitions 29/155 dead transitions. [2024-06-27 21:57:16,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 155 transitions, 1742 flow [2024-06-27 21:57:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:57:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:57:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-27 21:57:16,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7132352941176471 [2024-06-27 21:57:16,413 INFO L175 Difference]: Start difference. First operand has 127 places, 128 transitions, 1296 flow. Second operand 4 states and 97 transitions. [2024-06-27 21:57:16,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 155 transitions, 1742 flow [2024-06-27 21:57:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 155 transitions, 1480 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:16,479 INFO L231 Difference]: Finished difference. Result has 128 places, 98 transitions, 897 flow [2024-06-27 21:57:16,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=897, PETRI_PLACES=128, PETRI_TRANSITIONS=98} [2024-06-27 21:57:16,480 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 94 predicate places. [2024-06-27 21:57:16,481 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 98 transitions, 897 flow [2024-06-27 21:57:16,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:16,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:16,482 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] [2024-06-27 21:57:16,497 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 21:57:16,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:16,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:16,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1919617110, now seen corresponding path program 3 times [2024-06-27 21:57:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:16,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869574752] [2024-06-27 21:57:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869574752] [2024-06-27 21:57:17,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869574752] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491973647] [2024-06-27 21:57:17,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:17,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:17,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:17,431 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 21:57:17,451 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 21:57:17,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:57:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:17,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 21:57:17,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:57:17,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:17,622 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-27 21:57:17,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-06-27 21:57:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-27 21:57:17,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491973647] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:17,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:17,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2024-06-27 21:57:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510868511] [2024-06-27 21:57:17,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:17,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-06-27 21:57:17,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-06-27 21:57:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-06-27 21:57:17,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:17,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 98 transitions, 897 flow. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 16 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:17,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:18,517 INFO L124 PetriNetUnfolderBase]: 1723/3323 cut-off events. [2024-06-27 21:57:18,519 INFO L125 PetriNetUnfolderBase]: For 46979/46979 co-relation queries the response was YES. [2024-06-27 21:57:18,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15604 conditions, 3323 events. 1723/3323 cut-off events. For 46979/46979 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 20005 event pairs, 351 based on Foata normal form. 56/3377 useless extension candidates. Maximal degree in co-relation 15296. Up to 1195 conditions per place. [2024-06-27 21:57:18,555 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 164 selfloop transitions, 47 changer transitions 0/215 dead transitions. [2024-06-27 21:57:18,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 215 transitions, 2362 flow [2024-06-27 21:57:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 21:57:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 21:57:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 178 transitions. [2024-06-27 21:57:18,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739495798319328 [2024-06-27 21:57:18,557 INFO L175 Difference]: Start difference. First operand has 128 places, 98 transitions, 897 flow. Second operand 14 states and 178 transitions. [2024-06-27 21:57:18,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 215 transitions, 2362 flow [2024-06-27 21:57:18,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 2012 flow, removed 160 selfloop flow, removed 16 redundant places. [2024-06-27 21:57:18,628 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 1080 flow [2024-06-27 21:57:18,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1080, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2024-06-27 21:57:18,629 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 75 predicate places. [2024-06-27 21:57:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 1080 flow [2024-06-27 21:57:18,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 16 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:18,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:18,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:18,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 21:57:18,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-06-27 21:57:18,844 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:18,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash -638619203, now seen corresponding path program 1 times [2024-06-27 21:57:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046190113] [2024-06-27 21:57:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:18,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046190113] [2024-06-27 21:57:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046190113] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:19,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999387739] [2024-06-27 21:57:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:19,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:19,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:19,875 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 21:57:19,915 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 21:57:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:20,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 21:57:20,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:57:20,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:21,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:21,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 21:57:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:57:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999387739] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:21,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:21,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 43 [2024-06-27 21:57:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309903993] [2024-06-27 21:57:21,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 21:57:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 21:57:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 21:57:22,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:22,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 1080 flow. Second operand has 44 states, 44 states have (on average 7.818181818181818) internal successors, (344), 44 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 21:57:22,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:22,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:22,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:25,253 INFO L124 PetriNetUnfolderBase]: 3070/5717 cut-off events. [2024-06-27 21:57:25,253 INFO L125 PetriNetUnfolderBase]: For 35090/35090 co-relation queries the response was YES. [2024-06-27 21:57:25,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23840 conditions, 5717 events. 3070/5717 cut-off events. For 35090/35090 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 37554 event pairs, 277 based on Foata normal form. 2/5719 useless extension candidates. Maximal degree in co-relation 19590. Up to 3053 conditions per place. [2024-06-27 21:57:25,293 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 243 selfloop transitions, 153 changer transitions 5/407 dead transitions. [2024-06-27 21:57:25,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 407 transitions, 4177 flow [2024-06-27 21:57:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-06-27 21:57:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-06-27 21:57:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 383 transitions. [2024-06-27 21:57:25,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35202205882352944 [2024-06-27 21:57:25,295 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 1080 flow. Second operand 32 states and 383 transitions. [2024-06-27 21:57:25,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 407 transitions, 4177 flow [2024-06-27 21:57:25,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 407 transitions, 4066 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 21:57:25,498 INFO L231 Difference]: Finished difference. Result has 145 places, 248 transitions, 3048 flow [2024-06-27 21:57:25,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3048, PETRI_PLACES=145, PETRI_TRANSITIONS=248} [2024-06-27 21:57:25,498 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 111 predicate places. [2024-06-27 21:57:25,499 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 248 transitions, 3048 flow [2024-06-27 21:57:25,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.818181818181818) internal successors, (344), 44 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 21:57:25,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:25,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:25,517 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 21:57:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 21:57:25,712 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:25,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1030540149, now seen corresponding path program 2 times [2024-06-27 21:57:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:25,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472084679] [2024-06-27 21:57:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:25,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:26,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:26,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472084679] [2024-06-27 21:57:26,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472084679] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:26,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849240976] [2024-06-27 21:57:26,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:57:26,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:26,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:26,898 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 21:57:26,917 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 21:57:27,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:57:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:27,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 21:57:27,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:28,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:28,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:28,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 21:57:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:29,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849240976] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:29,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:29,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-06-27 21:57:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962543397] [2024-06-27 21:57:29,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-06-27 21:57:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-06-27 21:57:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2024-06-27 21:57:30,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:30,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 248 transitions, 3048 flow. Second operand has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:30,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:30,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:30,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:39,107 INFO L124 PetriNetUnfolderBase]: 3673/6917 cut-off events. [2024-06-27 21:57:39,107 INFO L125 PetriNetUnfolderBase]: For 54046/54046 co-relation queries the response was YES. [2024-06-27 21:57:39,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33854 conditions, 6917 events. 3673/6917 cut-off events. For 54046/54046 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48469 event pairs, 287 based on Foata normal form. 3/6920 useless extension candidates. Maximal degree in co-relation 33780. Up to 3395 conditions per place. [2024-06-27 21:57:39,156 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 337 selfloop transitions, 359 changer transitions 10/712 dead transitions. [2024-06-27 21:57:39,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 712 transitions, 8084 flow [2024-06-27 21:57:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-06-27 21:57:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-06-27 21:57:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 829 transitions. [2024-06-27 21:57:39,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3294912559618442 [2024-06-27 21:57:39,160 INFO L175 Difference]: Start difference. First operand has 145 places, 248 transitions, 3048 flow. Second operand 74 states and 829 transitions. [2024-06-27 21:57:39,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 712 transitions, 8084 flow [2024-06-27 21:57:39,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 712 transitions, 7646 flow, removed 213 selfloop flow, removed 7 redundant places. [2024-06-27 21:57:39,512 INFO L231 Difference]: Finished difference. Result has 228 places, 488 transitions, 6487 flow [2024-06-27 21:57:39,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=6487, PETRI_PLACES=228, PETRI_TRANSITIONS=488} [2024-06-27 21:57:39,513 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 194 predicate places. [2024-06-27 21:57:39,513 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 488 transitions, 6487 flow [2024-06-27 21:57:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:39,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:39,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:39,525 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 21:57:39,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:39,714 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:39,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1399015815, now seen corresponding path program 3 times [2024-06-27 21:57:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:39,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427261094] [2024-06-27 21:57:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:40,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427261094] [2024-06-27 21:57:40,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427261094] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034649348] [2024-06-27 21:57:40,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:57:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:40,937 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 21:57:40,953 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 21:57:41,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:57:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:41,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 21:57:41,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:42,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:42,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:42,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 21:57:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:43,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034649348] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:57:43,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:57:43,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-06-27 21:57:43,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745396159] [2024-06-27 21:57:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:57:43,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-06-27 21:57:43,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:57:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-06-27 21:57:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2424, Unknown=0, NotChecked=0, Total=2652 [2024-06-27 21:57:43,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:57:43,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 488 transitions, 6487 flow. Second operand has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:43,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:57:43,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:57:43,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:57:51,984 INFO L124 PetriNetUnfolderBase]: 3930/7464 cut-off events. [2024-06-27 21:57:51,985 INFO L125 PetriNetUnfolderBase]: For 82123/82123 co-relation queries the response was YES. [2024-06-27 21:57:52,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42263 conditions, 7464 events. 3930/7464 cut-off events. For 82123/82123 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 53756 event pairs, 294 based on Foata normal form. 3/7460 useless extension candidates. Maximal degree in co-relation 42166. Up to 3779 conditions per place. [2024-06-27 21:57:52,051 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 388 selfloop transitions, 456 changer transitions 10/860 dead transitions. [2024-06-27 21:57:52,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 860 transitions, 11221 flow [2024-06-27 21:57:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-06-27 21:57:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-06-27 21:57:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 766 transitions. [2024-06-27 21:57:52,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313148788927336 [2024-06-27 21:57:52,060 INFO L175 Difference]: Start difference. First operand has 228 places, 488 transitions, 6487 flow. Second operand 68 states and 766 transitions. [2024-06-27 21:57:52,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 860 transitions, 11221 flow [2024-06-27 21:57:52,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 860 transitions, 10514 flow, removed 298 selfloop flow, removed 13 redundant places. [2024-06-27 21:57:52,442 INFO L231 Difference]: Finished difference. Result has 301 places, 647 transitions, 9512 flow [2024-06-27 21:57:52,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=9512, PETRI_PLACES=301, PETRI_TRANSITIONS=647} [2024-06-27 21:57:52,443 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 267 predicate places. [2024-06-27 21:57:52,443 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 647 transitions, 9512 flow [2024-06-27 21:57:52,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:57:52,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:57:52,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:57:52,457 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 21:57:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:52,650 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:57:52,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:57:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash -411507045, now seen corresponding path program 4 times [2024-06-27 21:57:52,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:57:52,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458289613] [2024-06-27 21:57:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:57:52,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:57:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:57:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:53,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:57:53,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458289613] [2024-06-27 21:57:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458289613] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:57:53,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836685781] [2024-06-27 21:57:53,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:57:53,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:57:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:57:53,714 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 21:57:53,715 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 21:57:53,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:57:53,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:57:53,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 46 conjunts are in the unsatisfiable core [2024-06-27 21:57:53,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:57:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:57:58,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:57:59,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:57:59,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2024-06-27 21:58:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836685781] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:00,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:00,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-06-27 21:58:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409802986] [2024-06-27 21:58:00,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:00,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 21:58:00,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:00,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 21:58:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 21:58:00,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:00,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 647 transitions, 9512 flow. Second operand has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:00,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:00,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:00,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:08,821 INFO L124 PetriNetUnfolderBase]: 4074/7776 cut-off events. [2024-06-27 21:58:08,821 INFO L125 PetriNetUnfolderBase]: For 115757/115757 co-relation queries the response was YES. [2024-06-27 21:58:08,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49272 conditions, 7776 events. 4074/7776 cut-off events. For 115757/115757 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 56780 event pairs, 314 based on Foata normal form. 4/7780 useless extension candidates. Maximal degree in co-relation 49138. Up to 3288 conditions per place. [2024-06-27 21:58:08,893 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 429 selfloop transitions, 523 changer transitions 9/967 dead transitions. [2024-06-27 21:58:08,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 967 transitions, 13994 flow [2024-06-27 21:58:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-06-27 21:58:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-06-27 21:58:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 828 transitions. [2024-06-27 21:58:08,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33360193392425463 [2024-06-27 21:58:08,896 INFO L175 Difference]: Start difference. First operand has 301 places, 647 transitions, 9512 flow. Second operand 73 states and 828 transitions. [2024-06-27 21:58:08,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 967 transitions, 13994 flow [2024-06-27 21:58:09,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 967 transitions, 13663 flow, removed 118 selfloop flow, removed 21 redundant places. [2024-06-27 21:58:09,496 INFO L231 Difference]: Finished difference. Result has 358 places, 734 transitions, 11955 flow [2024-06-27 21:58:09,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=11955, PETRI_PLACES=358, PETRI_TRANSITIONS=734} [2024-06-27 21:58:09,497 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 324 predicate places. [2024-06-27 21:58:09,497 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 734 transitions, 11955 flow [2024-06-27 21:58:09,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:09,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:09,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:09,508 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 21:58:09,697 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,SelfDestructingSolverStorable20 [2024-06-27 21:58:09,698 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:58:09,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:09,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2056046301, now seen corresponding path program 5 times [2024-06-27 21:58:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:09,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042857987] [2024-06-27 21:58:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:10,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:10,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:10,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042857987] [2024-06-27 21:58:10,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042857987] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:10,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172687115] [2024-06-27 21:58:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:58:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:10,569 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 21:58:10,570 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 21:58:10,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:58:10,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:10,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 48 conjunts are in the unsatisfiable core [2024-06-27 21:58:10,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:11,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:12,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:12,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2024-06-27 21:58:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172687115] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:12,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2024-06-27 21:58:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304667891] [2024-06-27 21:58:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:12,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-06-27 21:58:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-06-27 21:58:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2502, Unknown=0, NotChecked=0, Total=2756 [2024-06-27 21:58:13,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:13,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 734 transitions, 11955 flow. Second operand has 53 states, 53 states have (on average 7.528301886792453) internal successors, (399), 53 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:13,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:13,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:13,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:19,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-06-27 21:58:23,616 INFO L124 PetriNetUnfolderBase]: 4149/8006 cut-off events. [2024-06-27 21:58:23,616 INFO L125 PetriNetUnfolderBase]: For 149847/149847 co-relation queries the response was YES. [2024-06-27 21:58:23,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55032 conditions, 8006 events. 4149/8006 cut-off events. For 149847/149847 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 59830 event pairs, 197 based on Foata normal form. 5/8011 useless extension candidates. Maximal degree in co-relation 54763. Up to 3425 conditions per place. [2024-06-27 21:58:23,686 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 440 selfloop transitions, 547 changer transitions 25/1018 dead transitions. [2024-06-27 21:58:23,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1018 transitions, 16271 flow [2024-06-27 21:58:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-06-27 21:58:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-06-27 21:58:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 827 transitions. [2024-06-27 21:58:23,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3331990330378727 [2024-06-27 21:58:23,688 INFO L175 Difference]: Start difference. First operand has 358 places, 734 transitions, 11955 flow. Second operand 73 states and 827 transitions. [2024-06-27 21:58:23,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1018 transitions, 16271 flow [2024-06-27 21:58:24,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1018 transitions, 15920 flow, removed 101 selfloop flow, removed 32 redundant places. [2024-06-27 21:58:24,481 INFO L231 Difference]: Finished difference. Result has 403 places, 761 transitions, 13827 flow [2024-06-27 21:58:24,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=13827, PETRI_PLACES=403, PETRI_TRANSITIONS=761} [2024-06-27 21:58:24,482 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 369 predicate places. [2024-06-27 21:58:24,483 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 761 transitions, 13827 flow [2024-06-27 21:58:24,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 7.528301886792453) internal successors, (399), 53 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:24,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:24,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:24,495 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 21:58:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:24,688 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:58:24,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:24,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1378034985, now seen corresponding path program 6 times [2024-06-27 21:58:24,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:24,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266748873] [2024-06-27 21:58:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:24,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266748873] [2024-06-27 21:58:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266748873] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979467940] [2024-06-27 21:58:25,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 21:58:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:25,613 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 21:58:25,619 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 21:58:25,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 21:58:25,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:25,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2024-06-27 21:58:25,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:26,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:27,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:27,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 21:58:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:27,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979467940] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:27,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-06-27 21:58:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079090442] [2024-06-27 21:58:27,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-06-27 21:58:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-06-27 21:58:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2024-06-27 21:58:28,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:28,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 761 transitions, 13827 flow. Second operand has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:28,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:28,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:28,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:35,019 INFO L124 PetriNetUnfolderBase]: 4159/8074 cut-off events. [2024-06-27 21:58:35,020 INFO L125 PetriNetUnfolderBase]: For 176552/176552 co-relation queries the response was YES. [2024-06-27 21:58:35,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59505 conditions, 8074 events. 4159/8074 cut-off events. For 176552/176552 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 61246 event pairs, 326 based on Foata normal form. 4/8078 useless extension candidates. Maximal degree in co-relation 59372. Up to 4163 conditions per place. [2024-06-27 21:58:35,103 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 452 selfloop transitions, 509 changer transitions 16/983 dead transitions. [2024-06-27 21:58:35,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 983 transitions, 17275 flow [2024-06-27 21:58:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-06-27 21:58:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-06-27 21:58:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 671 transitions. [2024-06-27 21:58:35,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34026369168356996 [2024-06-27 21:58:35,107 INFO L175 Difference]: Start difference. First operand has 403 places, 761 transitions, 13827 flow. Second operand 58 states and 671 transitions. [2024-06-27 21:58:35,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 983 transitions, 17275 flow [2024-06-27 21:58:36,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 983 transitions, 16855 flow, removed 57 selfloop flow, removed 51 redundant places. [2024-06-27 21:58:36,147 INFO L231 Difference]: Finished difference. Result has 411 places, 775 transitions, 15298 flow [2024-06-27 21:58:36,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=13409, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15298, PETRI_PLACES=411, PETRI_TRANSITIONS=775} [2024-06-27 21:58:36,148 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 377 predicate places. [2024-06-27 21:58:36,148 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 775 transitions, 15298 flow [2024-06-27 21:58:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 7.5576923076923075) internal successors, (393), 52 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:36,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:36,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:36,159 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 21:58:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-06-27 21:58:36,349 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:58:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 265785521, now seen corresponding path program 7 times [2024-06-27 21:58:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330111328] [2024-06-27 21:58:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330111328] [2024-06-27 21:58:37,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330111328] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278777839] [2024-06-27 21:58:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 21:58:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:37,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:37,179 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 21:58:37,180 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 21:58:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:37,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 21:58:37,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 21:58:37,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:38,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:38,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 21:58:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:58:38,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278777839] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:38,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:38,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 43 [2024-06-27 21:58:38,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188758188] [2024-06-27 21:58:38,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:38,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 21:58:38,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 21:58:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 21:58:39,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 775 transitions, 15298 flow. Second operand has 44 states, 44 states have (on average 7.818181818181818) internal successors, (344), 44 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 21:58:39,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:39,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:58:43,332 INFO L124 PetriNetUnfolderBase]: 4230/8200 cut-off events. [2024-06-27 21:58:43,332 INFO L125 PetriNetUnfolderBase]: For 212557/212557 co-relation queries the response was YES. [2024-06-27 21:58:43,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64536 conditions, 8200 events. 4230/8200 cut-off events. For 212557/212557 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62125 event pairs, 308 based on Foata normal form. 5/8205 useless extension candidates. Maximal degree in co-relation 64400. Up to 4485 conditions per place. [2024-06-27 21:58:43,415 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 473 selfloop transitions, 447 changer transitions 20/946 dead transitions. [2024-06-27 21:58:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 946 transitions, 18671 flow [2024-06-27 21:58:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 21:58:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 21:58:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 373 transitions. [2024-06-27 21:58:43,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3538899430740038 [2024-06-27 21:58:43,417 INFO L175 Difference]: Start difference. First operand has 411 places, 775 transitions, 15298 flow. Second operand 31 states and 373 transitions. [2024-06-27 21:58:43,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 946 transitions, 18671 flow [2024-06-27 21:58:44,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 946 transitions, 18335 flow, removed 37 selfloop flow, removed 43 redundant places. [2024-06-27 21:58:44,686 INFO L231 Difference]: Finished difference. Result has 403 places, 796 transitions, 16996 flow [2024-06-27 21:58:44,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14976, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=16996, PETRI_PLACES=403, PETRI_TRANSITIONS=796} [2024-06-27 21:58:44,687 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 369 predicate places. [2024-06-27 21:58:44,687 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 796 transitions, 16996 flow [2024-06-27 21:58:44,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.818181818181818) internal successors, (344), 44 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 21:58:44,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:58:44,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:58:44,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-06-27 21:58:44,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 21:58:44,889 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:58:44,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:58:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2081371805, now seen corresponding path program 8 times [2024-06-27 21:58:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:58:44,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557375381] [2024-06-27 21:58:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:58:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:58:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:58:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:58:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557375381] [2024-06-27 21:58:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557375381] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:58:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513774337] [2024-06-27 21:58:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 21:58:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:58:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:58:45,886 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 21:58:45,886 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 21:58:45,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:58:45,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:58:45,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 21:58:45,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:58:46,326 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 11 treesize of output 3 [2024-06-27 21:58:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:46,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:58:47,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:58:47,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 21:58:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:58:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513774337] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:58:48,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:58:48,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 49 [2024-06-27 21:58:48,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192221042] [2024-06-27 21:58:48,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:58:48,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-06-27 21:58:48,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:58:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-06-27 21:58:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2024-06-27 21:58:48,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:58:48,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 796 transitions, 16996 flow. Second operand has 50 states, 50 states have (on average 7.6) internal successors, (380), 50 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:58:48,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:58:48,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:58:48,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:01,591 INFO L124 PetriNetUnfolderBase]: 5825/11194 cut-off events. [2024-06-27 21:59:01,591 INFO L125 PetriNetUnfolderBase]: For 369685/369685 co-relation queries the response was YES. [2024-06-27 21:59:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96184 conditions, 11194 events. 5825/11194 cut-off events. For 369685/369685 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 89412 event pairs, 294 based on Foata normal form. 5/11199 useless extension candidates. Maximal degree in co-relation 96019. Up to 4388 conditions per place. [2024-06-27 21:59:01,712 INFO L140 encePairwiseOnDemand]: 17/34 looper letters, 521 selfloop transitions, 1068 changer transitions 37/1632 dead transitions. [2024-06-27 21:59:01,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1632 transitions, 36325 flow [2024-06-27 21:59:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-06-27 21:59:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-06-27 21:59:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1145 transitions. [2024-06-27 21:59:01,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33676470588235297 [2024-06-27 21:59:01,715 INFO L175 Difference]: Start difference. First operand has 403 places, 796 transitions, 16996 flow. Second operand 100 states and 1145 transitions. [2024-06-27 21:59:01,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1632 transitions, 36325 flow [2024-06-27 21:59:03,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1632 transitions, 36116 flow, removed 38 selfloop flow, removed 22 redundant places. [2024-06-27 21:59:03,793 INFO L231 Difference]: Finished difference. Result has 514 places, 1372 transitions, 34438 flow [2024-06-27 21:59:03,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=16845, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=34438, PETRI_PLACES=514, PETRI_TRANSITIONS=1372} [2024-06-27 21:59:03,794 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 480 predicate places. [2024-06-27 21:59:03,794 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 1372 transitions, 34438 flow [2024-06-27 21:59:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 7.6) internal successors, (380), 50 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:03,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:03,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:03,805 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 21:59:03,994 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,SelfDestructingSolverStorable24 [2024-06-27 21:59:03,995 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:59:03,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2018048919, now seen corresponding path program 9 times [2024-06-27 21:59:03,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:03,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26321230] [2024-06-27 21:59:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:03,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26321230] [2024-06-27 21:59:04,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26321230] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:59:04,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695529434] [2024-06-27 21:59:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 21:59:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:04,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:04,816 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 21:59:04,817 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 21:59:04,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 21:59:04,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:59:04,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 21:59:04,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:05,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:59:06,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:59:06,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 21:59:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695529434] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:59:07,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:59:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-06-27 21:59:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698241533] [2024-06-27 21:59:07,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:59:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 21:59:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 21:59:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 21:59:07,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:59:07,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 1372 transitions, 34438 flow. Second operand has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:07,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:07,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:59:07,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:21,446 INFO L124 PetriNetUnfolderBase]: 5977/11509 cut-off events. [2024-06-27 21:59:21,446 INFO L125 PetriNetUnfolderBase]: For 476396/476396 co-relation queries the response was YES. [2024-06-27 21:59:21,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112768 conditions, 11509 events. 5977/11509 cut-off events. For 476396/476396 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 92347 event pairs, 395 based on Foata normal form. 4/11513 useless extension candidates. Maximal degree in co-relation 112547. Up to 5099 conditions per place. [2024-06-27 21:59:21,594 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 690 selfloop transitions, 951 changer transitions 12/1659 dead transitions. [2024-06-27 21:59:21,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1659 transitions, 41547 flow [2024-06-27 21:59:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-06-27 21:59:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-06-27 21:59:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 809 transitions. [2024-06-27 21:59:21,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3351284175642088 [2024-06-27 21:59:21,597 INFO L175 Difference]: Start difference. First operand has 514 places, 1372 transitions, 34438 flow. Second operand 71 states and 809 transitions. [2024-06-27 21:59:21,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1659 transitions, 41547 flow [2024-06-27 21:59:25,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1659 transitions, 40409 flow, removed 508 selfloop flow, removed 23 redundant places. [2024-06-27 21:59:25,282 INFO L231 Difference]: Finished difference. Result has 567 places, 1452 transitions, 38397 flow [2024-06-27 21:59:25,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=33386, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=38397, PETRI_PLACES=567, PETRI_TRANSITIONS=1452} [2024-06-27 21:59:25,284 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 533 predicate places. [2024-06-27 21:59:25,284 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1452 transitions, 38397 flow [2024-06-27 21:59:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:25,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:25,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:25,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 21:59:25,502 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,SelfDestructingSolverStorable25 [2024-06-27 21:59:25,503 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:59:25,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1616977617, now seen corresponding path program 10 times [2024-06-27 21:59:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221161041] [2024-06-27 21:59:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221161041] [2024-06-27 21:59:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221161041] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:59:26,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657333373] [2024-06-27 21:59:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 21:59:26,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:26,396 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 21:59:26,397 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 21:59:26,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 21:59:26,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:59:26,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 46 conjunts are in the unsatisfiable core [2024-06-27 21:59:26,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:27,002 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 12 treesize of output 3 [2024-06-27 21:59:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:27,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:59:28,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:59:28,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 21:59:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657333373] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:59:28,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:59:28,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-06-27 21:59:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319757042] [2024-06-27 21:59:28,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:59:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-06-27 21:59:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:28,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-06-27 21:59:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2024-06-27 21:59:29,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 21:59:29,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1452 transitions, 38397 flow. Second operand has 50 states, 50 states have (on average 7.62) internal successors, (381), 50 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:29,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:29,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 21:59:29,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:59:43,348 INFO L124 PetriNetUnfolderBase]: 6197/12006 cut-off events. [2024-06-27 21:59:43,348 INFO L125 PetriNetUnfolderBase]: For 563893/563893 co-relation queries the response was YES. [2024-06-27 21:59:43,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122157 conditions, 12006 events. 6197/12006 cut-off events. For 563893/563893 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 98283 event pairs, 391 based on Foata normal form. 5/12011 useless extension candidates. Maximal degree in co-relation 121937. Up to 6659 conditions per place. [2024-06-27 21:59:43,507 INFO L140 encePairwiseOnDemand]: 17/34 looper letters, 712 selfloop transitions, 1011 changer transitions 64/1793 dead transitions. [2024-06-27 21:59:43,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1793 transitions, 46878 flow [2024-06-27 21:59:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-06-27 21:59:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-06-27 21:59:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 968 transitions. [2024-06-27 21:59:43,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2024-06-27 21:59:43,510 INFO L175 Difference]: Start difference. First operand has 567 places, 1452 transitions, 38397 flow. Second operand 88 states and 968 transitions. [2024-06-27 21:59:43,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1793 transitions, 46878 flow [2024-06-27 21:59:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 1793 transitions, 46418 flow, removed 113 selfloop flow, removed 29 redundant places. [2024-06-27 21:59:48,173 INFO L231 Difference]: Finished difference. Result has 644 places, 1543 transitions, 44088 flow [2024-06-27 21:59:48,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=37963, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=916, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=44088, PETRI_PLACES=644, PETRI_TRANSITIONS=1543} [2024-06-27 21:59:48,175 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 610 predicate places. [2024-06-27 21:59:48,175 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 1543 transitions, 44088 flow [2024-06-27 21:59:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 7.62) internal successors, (381), 50 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:48,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:59:48,176 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:59:48,194 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 21:59:48,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:48,395 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 21:59:48,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:59:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash -712399359, now seen corresponding path program 11 times [2024-06-27 21:59:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:59:48,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701453021] [2024-06-27 21:59:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:59:48,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:59:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:59:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:59:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:59:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701453021] [2024-06-27 21:59:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701453021] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 21:59:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79470099] [2024-06-27 21:59:49,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 21:59:49,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 21:59:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:59:49,272 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 21:59:49,273 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 21:59:49,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 21:59:49,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 21:59:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 21:59:49,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 21:59:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:59:50,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 21:59:50,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 21:59:50,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2024-06-27 21:59:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 21:59:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79470099] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 21:59:50,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 21:59:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 43 [2024-06-27 21:59:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56782199] [2024-06-27 21:59:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 21:59:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 21:59:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:59:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 21:59:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1746, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 21:59:52,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 21:59:52,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 1543 transitions, 44088 flow. Second operand has 44 states, 44 states have (on average 9.795454545454545) internal successors, (431), 44 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:59:52,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:59:52,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 21:59:52,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:00:00,418 INFO L124 PetriNetUnfolderBase]: 6277/12245 cut-off events. [2024-06-27 22:00:00,418 INFO L125 PetriNetUnfolderBase]: For 690006/690006 co-relation queries the response was YES. [2024-06-27 22:00:00,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132548 conditions, 12245 events. 6277/12245 cut-off events. For 690006/690006 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 101466 event pairs, 399 based on Foata normal form. 6/12251 useless extension candidates. Maximal degree in co-relation 132326. Up to 6999 conditions per place. [2024-06-27 22:00:00,611 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 804 selfloop transitions, 905 changer transitions 26/1741 dead transitions. [2024-06-27 22:00:00,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1741 transitions, 50468 flow [2024-06-27 22:00:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 22:00:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 22:00:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 538 transitions. [2024-06-27 22:00:00,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057315233785822 [2024-06-27 22:00:00,613 INFO L175 Difference]: Start difference. First operand has 644 places, 1543 transitions, 44088 flow. Second operand 39 states and 538 transitions. [2024-06-27 22:00:00,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1741 transitions, 50468 flow [2024-06-27 22:00:06,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1741 transitions, 49943 flow, removed 105 selfloop flow, removed 45 redundant places. [2024-06-27 22:00:06,822 INFO L231 Difference]: Finished difference. Result has 634 places, 1579 transitions, 47967 flow [2024-06-27 22:00:06,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=43581, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=47967, PETRI_PLACES=634, PETRI_TRANSITIONS=1579} [2024-06-27 22:00:06,830 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 600 predicate places. [2024-06-27 22:00:06,830 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1579 transitions, 47967 flow [2024-06-27 22:00:06,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 9.795454545454545) internal successors, (431), 44 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:00:06,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:00:06,831 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:00:06,850 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 22:00:07,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 22:00:07,047 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 22:00:07,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:00:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1550533911, now seen corresponding path program 12 times [2024-06-27 22:00:07,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:00:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37548476] [2024-06-27 22:00:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:00:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:00:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:00:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:00:07,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:00:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37548476] [2024-06-27 22:00:07,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37548476] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 22:00:07,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413701681] [2024-06-27 22:00:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 22:00:07,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:00:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:00:07,926 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 22:00:07,927 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 22:00:08,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 22:00:08,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 22:00:08,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2024-06-27 22:00:08,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:00:08,474 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 11 treesize of output 3 [2024-06-27 22:00:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:00:09,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 22:00:09,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 22:00:09,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 22:00:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:00:10,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413701681] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 22:00:10,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 22:00:10,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-06-27 22:00:10,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476718421] [2024-06-27 22:00:10,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 22:00:10,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 22:00:10,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:00:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 22:00:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 22:00:10,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 22:00:10,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1579 transitions, 47967 flow. Second operand has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:00:10,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:00:10,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 22:00:10,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:00:30,338 INFO L124 PetriNetUnfolderBase]: 7707/14840 cut-off events. [2024-06-27 22:00:30,338 INFO L125 PetriNetUnfolderBase]: For 975407/975407 co-relation queries the response was YES. [2024-06-27 22:00:30,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171056 conditions, 14840 events. 7707/14840 cut-off events. For 975407/975407 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 122404 event pairs, 404 based on Foata normal form. 10/14850 useless extension candidates. Maximal degree in co-relation 170814. Up to 6482 conditions per place. [2024-06-27 22:00:30,557 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 895 selfloop transitions, 1292 changer transitions 67/2260 dead transitions. [2024-06-27 22:00:30,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 2260 transitions, 67199 flow [2024-06-27 22:00:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-06-27 22:00:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2024-06-27 22:00:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1163 transitions. [2024-06-27 22:00:30,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34205882352941175 [2024-06-27 22:00:30,560 INFO L175 Difference]: Start difference. First operand has 634 places, 1579 transitions, 47967 flow. Second operand 100 states and 1163 transitions. [2024-06-27 22:00:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 2260 transitions, 67199 flow [2024-06-27 22:00:38,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 708 places, 2260 transitions, 66619 flow, removed 112 selfloop flow, removed 23 redundant places. [2024-06-27 22:00:38,116 INFO L231 Difference]: Finished difference. Result has 732 places, 1913 transitions, 63154 flow [2024-06-27 22:00:38,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=47525, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=63154, PETRI_PLACES=732, PETRI_TRANSITIONS=1913} [2024-06-27 22:00:38,118 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 698 predicate places. [2024-06-27 22:00:38,118 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 1913 transitions, 63154 flow [2024-06-27 22:00:38,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:00:38,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:00:38,119 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:00:38,131 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 22:00:38,322 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,SelfDestructingSolverStorable28 [2024-06-27 22:00:38,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 22:00:38,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:00:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1315896591, now seen corresponding path program 13 times [2024-06-27 22:00:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:00:38,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039531718] [2024-06-27 22:00:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:00:38,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:00:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:00:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:00:39,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:00:39,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039531718] [2024-06-27 22:00:39,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039531718] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 22:00:39,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421322661] [2024-06-27 22:00:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 22:00:39,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:00:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:00:39,232 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 22:00:39,233 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 22:00:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:00:39,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 22:00:39,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:00:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 22:00:40,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 22:00:40,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 22:00:40,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2024-06-27 22:00:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 22:00:40,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421322661] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 22:00:40,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 22:00:40,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 12] total 43 [2024-06-27 22:00:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719475561] [2024-06-27 22:00:40,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 22:00:40,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-06-27 22:00:40,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:00:40,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-06-27 22:00:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1745, Unknown=0, NotChecked=0, Total=1892 [2024-06-27 22:00:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-06-27 22:00:41,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 1913 transitions, 63154 flow. Second operand has 44 states, 44 states have (on average 9.818181818181818) internal successors, (432), 44 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 22:00:41,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:00:41,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-06-27 22:00:41,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:00:53,929 INFO L124 PetriNetUnfolderBase]: 7846/15040 cut-off events. [2024-06-27 22:00:53,929 INFO L125 PetriNetUnfolderBase]: For 1174657/1174657 co-relation queries the response was YES. [2024-06-27 22:00:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186690 conditions, 15040 events. 7846/15040 cut-off events. For 1174657/1174657 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 123126 event pairs, 496 based on Foata normal form. 2/15042 useless extension candidates. Maximal degree in co-relation 186429. Up to 8450 conditions per place. [2024-06-27 22:00:54,187 INFO L140 encePairwiseOnDemand]: 18/34 looper letters, 958 selfloop transitions, 1138 changer transitions 40/2142 dead transitions. [2024-06-27 22:00:54,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 2142 transitions, 70855 flow [2024-06-27 22:00:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-06-27 22:00:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-06-27 22:00:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 619 transitions. [2024-06-27 22:00:54,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045751633986928 [2024-06-27 22:00:54,188 INFO L175 Difference]: Start difference. First operand has 732 places, 1913 transitions, 63154 flow. Second operand 45 states and 619 transitions. [2024-06-27 22:00:54,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 2142 transitions, 70855 flow [2024-06-27 22:01:04,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 2142 transitions, 68626 flow, removed 961 selfloop flow, removed 34 redundant places. [2024-06-27 22:01:05,030 INFO L231 Difference]: Finished difference. Result has 735 places, 1953 transitions, 66180 flow [2024-06-27 22:01:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=61016, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=66180, PETRI_PLACES=735, PETRI_TRANSITIONS=1953} [2024-06-27 22:01:05,032 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 701 predicate places. [2024-06-27 22:01:05,032 INFO L495 AbstractCegarLoop]: Abstraction has has 735 places, 1953 transitions, 66180 flow [2024-06-27 22:01:05,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 9.818181818181818) internal successors, (432), 44 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 22:01:05,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:01:05,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:01:05,044 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 22:01:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:01:05,234 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 22:01:05,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:01:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1363948039, now seen corresponding path program 14 times [2024-06-27 22:01:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:01:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38274392] [2024-06-27 22:01:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:01:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:01:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:01:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:06,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:01:06,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38274392] [2024-06-27 22:01:06,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38274392] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 22:01:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988525614] [2024-06-27 22:01:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 22:01:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 22:01:06,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:01:06,012 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 22:01:06,014 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 22:01:06,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 22:01:06,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 22:01:06,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-27 22:01:06,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 22:01:06,612 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 11 treesize of output 3 [2024-06-27 22:01:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:06,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 22:01:07,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 22:01:07,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-06-27 22:01:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:01:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988525614] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 22:01:08,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 22:01:08,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-06-27 22:01:08,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79771855] [2024-06-27 22:01:08,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 22:01:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-06-27 22:01:08,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:01:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-06-27 22:01:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2024-06-27 22:01:08,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 34 [2024-06-27 22:01:08,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1953 transitions, 66180 flow. Second operand has 51 states, 51 states have (on average 7.588235294117647) internal successors, (387), 51 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:01:08,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:01:08,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 34 [2024-06-27 22:01:08,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:01:27,111 INFO L124 PetriNetUnfolderBase]: 8192/15703 cut-off events. [2024-06-27 22:01:27,111 INFO L125 PetriNetUnfolderBase]: For 1383514/1383514 co-relation queries the response was YES. [2024-06-27 22:01:27,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199624 conditions, 15703 events. 8192/15703 cut-off events. For 1383514/1383514 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 129515 event pairs, 510 based on Foata normal form. 64/15765 useless extension candidates. Maximal degree in co-relation 199413. Up to 4802 conditions per place. [2024-06-27 22:01:27,378 INFO L140 encePairwiseOnDemand]: 17/34 looper letters, 807 selfloop transitions, 1516 changer transitions 51/2380 dead transitions. [2024-06-27 22:01:27,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 2380 transitions, 81024 flow [2024-06-27 22:01:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-06-27 22:01:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2024-06-27 22:01:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1077 transitions. [2024-06-27 22:01:27,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32996323529411764 [2024-06-27 22:01:27,380 INFO L175 Difference]: Start difference. First operand has 735 places, 1953 transitions, 66180 flow. Second operand 96 states and 1077 transitions. [2024-06-27 22:01:27,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 2380 transitions, 81024 flow